C H A P T E R 8

OSPFv3

OSPFv3 is the modified form of OSPF to support version 6 of IP. The fundamental mechanisms of OSPF remain unchanged, such as: flooding, DR election, area support, SPF calculations, and so on. However, some changes have been necessary due to either changes in protocol semantics from IPv4 to IPv6, or simply to handle the increased address size of IPv6.

##

8.1 OSPFv3 Commands

The list of CLI commands for the configuration of OSPFv3 are as follows:

- ipv6 router ospf

- router-id - IPv4-address

- area - stub | nssa

- area - stability-interval

- area - translation-role

- timers spf

- abr-type

- area - default-metric value

- area - default-metric type

- area - virtual-link

- ASBR Router

- area - range

- area - range - cost

- area - summary-prefix

- redistribute

- passive-interface

- host - metric | area-id

- no area

- no area - range

- nssaAsbrDfRtTrans

- redist-config

- as-external lsdb-limit

- exit-overflow-interval

- demand-extensions

- reference-bandwidth

- auto-cost reference-bandwidth

- ipv6 ospf area

- ipv6 ospf demand-circuit

- ipv6 ospf retransmit-interval

- ipv6 ospf transmit-delay

- ipv6 ospf priority

- no ipv6 ospf priority

- ipv6 ospf hello-interval

- ipv6 ospf dead-interval

- ipv6 ospf poll-interval

- ipv6 ospf metric

- ipv6 ospf network

- ipv6 ospf neighbor

- ipv6 ospf passive-interface

- ipv6 ospf neighbor probing

- ipv6 ospf neighbor-probe retransmit-limit

- ipv6 ospf neighbor-probe interval

- debug ipv6 ospf - pkt

- debug ipv6 ospf

- debug ipv6 ospf - packet | events

- show ipv6 ospf interface

- show ipv6 ospf neighbor

- show ipv6 ospf - request/retrans-list

- show ipv6 ospf virtual-links

- show ipv6 ospf border-routers

- show ipv6 ospf - area-range / summary-prefix

- show ipv6 ospf - General Information

- show ipv6 ospf - LSA Database

- show ipv6 ospf route

- show ipv6 ospf areas

- show ipv6 ospf host

- show ipv6 ospf redist-config

### 8.1.1 `ipv6 router ospf`

Enables the OSPFv3 routing protocol. The `no` form of the command disables the OSPFv3 routing protocol.

    ipv6 router ospf

    no ipv6 router ospf

Mode | Global Configuration
Defaults | Disabled.
Example | SEFOS(config)# ipv6 router ospf
Notes | The `no` form of the command disables all the interfaces and triggers flushing of self-originated LSAs and deletes the router’s link state database.

### 8.1.2 `router-id - IPv4-address`

Sets a fixed router identifier.

    router-id IPv4-address

Syntax Description | IPv4-address - A 32-bit integer that uniquely identifies the router in the autonomous system.
Mode | Router Configuration
Defaults | IPv4-address - 0.0.0.0
Example | SEFOS(config-router)# router-id 11.0.0.1

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.3 `area - stub | nssa`

Defines an area as a stub area or an NSSA.

    area area-id {{stub | nssa} [no-summary]}

Syntax Description | area-id - A 32-bit integer. stub - Stub area. nssa - NSSA. no-summary - Allows an area to be a stubby or not-so-stubby but does not allow it to have summary routes injected into it.
Mode | Router Configuration
Example | SEFOS(config-router)# area 1.1.1.1 stub no-summary
Notes | In stub area, the generation of summary LSA is optional. If `no-summary` option is specified in the command, then the router neither originates nor propagates summary LSAs into the stubby area or NSSA. It relies entirely on its default route. If the no-summary option is not specified, the router summarizes and propagates summary LSAs. The`no-summary` option can be specified only in the area border Routers and by default, it is set to send summary.

#### Related Commands

- show ipv6 ospf areas - Displays the area table

### 8.1.4 `area - stability-interval`

Configures the stability interval (in seconds) for the NSSA. The `no` form of the command sets the default value of the stability interval for the NSSA.

    area area-id stability-interval seconds_1-65535

    no area area-id stability-interval

Syntax Description | area-id - A 32 bit integer. stability-interval - The number of seconds after which an elected translator determines that its services are no longer required, and that it must continue to perform its translation duties.
Mode | Router Configuration
Defaults | stability-interval - 40
Example | SEFOS(config-router)# area 0.0.0.1 stability-interval 50

#### Related Commands

- show ipv6 ospf areas - Displays the area table

### 8.1.5 `area - translation-role`

Configures the translation role for NSSA. The `no` form of the command configures the default translation role for the NSSA.

    area area-id translation-role {always | candidate}

    no area area-id translation-role

Syntax Description | area-id - A 32-bit integer. translation-role - An NSSA border router’s ability to perform NSSA Translation of Type-7 LSAs to Type-5 LSAs.
Mode | Router Configuration
Defaults | translation-role - candidate
Example | SEFOS(config-router)# area 0.0.0.1 translation-role always
Notes | When the translator role is set to always, the Type-7 LSAs are always translated into Type-5 LSAs. When translator role is set to candidate, an NSSA border router participates in the translator election process.

#### Related Commands

- show ipv6 ospf areas - Displays the area table

### 8.1.6 `timers spf`

Configures the delay time and the hold time between two consecutive SPF calculations. The `no` form of the command sets the default values for spf-delay and spf-holdtime.

Note - Delay time is the time interval when OSPFv3 receives a topology change and when it starts a Shortest Path First (SPF) calculation.

    timers spf spf-delay spf-holdtime

    no timers spf

Syntax Description | spf-delay - The interval by which SPF calculation is delayed after a topology change reception. spf-holdtime - The delay between two consecutive SPF calculations.
Mode | Router Configuration
Defaults | spf-delay - 5 spf-holdtime - 10
Example | SEFOS(config-router)# timers spf 10 20

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.7 `abr-type`

Sets the ABR (Area Border Router) type.

    abr-type {standard | cisco | ibm}

    no abr-type

Syntax Description | standard - Standard ABR type. cisco - CISCO ABR type. ibm - IBM ABR type.
Mode | Router Configuration
Defaults | standard
Example | SEFOS(config-router)# abr-type cisco

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.8 `area - default-metric value`

Sets the default metric value for an area of type NSS/stub only.

    area area-id default-metric metric

Syntax Description | area-id - A 32-bit integer. default-metric - Cost for the default summary route in a stub/NSS area.
Mode | Router Configuration
Defaults | default-metric - 1
Example | SEFOS(config-router)# area 1.1.1.1 default-metric 20
Notes | Default metric can be defined only for a valid area.

#### Related Commands

- area - stub | nssa - Defines an area as a stub area or an NSSA

### 8.1.9 `area - default-metric type`

Sets the default metric-type for an area type of NSS or stub only.

    area area-id default-metric type metric-type_1-3

Syntax Description | area-id - A 32 bit integer. default-metric type - Type of metric.
Mode | Router Configuration
Defaults | default-metric type - 1
Example | SEFOS(config-router)# area 1.1.1.1 default-metric type 2
Notes | Default metric can be defined only for a valid area.

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.10 `area - virtual-link`

Sets the virtual link between areas.

In OSPFv3, all areas must be connected to a backbone area. If there is a break in backbone continuity, or the backbone is purposefully partitioned, a virtual link can be established. The two endpoints of a virtual link are ABRs. The virtual link must be configured in both routers. The configuration information in each router consists of the other virtual endpoint (the other ABR) and the non-backbone area that the two routers have in common (called the transit area).

If 20.0.0.3 is the Router ID of the Neighbor and 100 is the Interface Index assigned to the OSPFv3 virtual interface, then this interface index is advertised in Hello packet sent over the virtual link and in the router’s router-LSAs.

    area area-id virtual-link router-id if-index [hello-interval seconds] [retransmit-interval seconds] [transmit-delay seconds] [dead-interval seconds]

Syntax Description | area-id - A 32-bit integer. router-id - The Router ID of the virtual neighbor. if-index - Interface Index assigned to the OSPFv3 virtual interface. hello-interval - The interval between hello packets on the OSPFv3 virtual link interface. This value ranges between 1 and 65535 seconds. retransmit-interval - The time between link-state advertisement (LSA) retransmissions for adjacencies belonging to the OSPFv3 virtual link interface. This value ranges between 1 and 1800 seconds. transmit-delay - The estimated time it takes to transmit a link state update packet over this interface. This value ranges between 1 and 1800 seconds. dead-interval - The interval at which hello packets must not be seen before its neighbors declare the router down. This value ranges between 1 and 65535 seconds.
Mode | Router Configuration
Defaults | hello-interval - 10 retransmit-interval - 20 transmit-delay - 1 dead-interval - 60
Example | SEFOS(config-router)# area 1.1.1.1 virtual-link 20.0.0.3 1 hello-interval 50 retransmit-interval 6 transmit-delay 6 dead-interval 100
Notes | Virtual links cannot be configured through stub areas. `hello-interval` and `dead-interval` values must be the same for all routers on a specific network.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

- show ipv6 ospf virtual-links - Displays the parameters and the current state of OSPFv3 virtual links

### 8.1.11 `ASBR Router`

Configures the router as an ASBR. The `no` form of the command disables the ASBR status of the router.

    ASBR Router

    no ASBR Router

Mode | Router Configuration
Example | SEFOS(config-router)# ASBR Router
Notes | Only when ASBR status is configured to enable, routes from other protocols are redistributed into OSPFv3 domain.

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.12 `area - range`

Creates the internal aggregation address range. The internal address range is of two types:

- Type-3 aggregation

- Type 7 translation aggregation

    area area-id range IPv6-prefix prefix-length [{advertise | not-advertise}] {summary | Type7} [tag tag-value]

Syntax Description | area-id - A 32-bit integer. range - Internal aggregation address range. ipv6-prefix - The IPv6 address prefix of the range. prefix-length - The prefix length of the address range. advertise - Flushes out all the routes (LSAs) falling in the range and generates aggregated LSA for the range. not-advertise - Suppresses routes that match the prefix/prefix-length pair. summary - Summary LSA. Type7 - Type-7 LSA. tag - Sets the tag value for the aggregated route.
Mode | Router Configuration
Defaults | tag - 0
Example | SEFOS(config-router)# area 0.0.0.0 range 3ffe:5000:481d::5 80 advertise Type7 tag 20
Notes | When parameter summary is specified, the configured range is used for aggregating Type-3 LSA. When parameter Type7 is specified, the configured range is used for aggregating Type-7 LSAs. The optional parameter tag is used to set the tag value for the aggregated route. This is not used by the OSPFv3 protocol alone. It can be used to communicate information between AS boundary routers.

#### Related Commands

- show ipv6 ospf - area-range / summary-prefix - Displays either the list of all area address ranges information or all external summary address configuration information

### 8.1.13 `area - range - cost`

Summarizes routes at an area boundary. This command operates similar to the command area - range.

    area area-id range IPv6-prefix | prefix-length [{advertise | not-advertise}] [tag value] [cost cost]

Syntax Description | area-id - Area identifier. This is a 32-bit integer. ipv6-prefix - The IPv6 address prefix of the range. prefix-length - The prefix length of the address range. advertise - Flushes out all the routes (LSAs) falling in the range and generates aggregated LSA for the range. not-advertise - Suppresses routes that match the prefix/prefix-length pair. tag - Sets the tag value for the aggregated route. The tag value is used to communicate information between AS boundary routers. cost - Metric or cost for a summary route, which is used during OSPF SPF calculation to determine the shortest paths to the destination. This value ranges between 0 and 16777215.
Mode | Router Configuration
Defaults | tag - 0
Example | SEFOS(config-router)# area 0.0.0.0 range 3ffe:5000:481d::5 / 80 advertise tag 20
Notes | The optional parameter tag is used to set the tag value for the aggregated route. This is not used by the OSPFv3 protocol alone. It can be used to communicate information between AS boundary routers.

#### Related Commands

- show ipv6 ospf - area-range / summary-prefix - Displays either the list of all area address ranges information or all external summary address configuration information

### 8.1.14 `area - summary-prefix`

Enables route aggregation or filtering while importing routes in the OSPFv3 domain. The command configures Type-5 and Type-7 address range specifying whether Type-5 or Type-7 LSAs are generated or not for the configured range for the particular area.

    area area-id summary-prefix IPv6-prefix prefix-length [{allowAll | denyAll | advertise | not-advertise}] [Translation {enabled | disabled}]

Syntax Description | area-id - A 32-bit integer. summary-prefix - Summary prefix. ipv6-prefix - The IPv6 address prefix of the range. prefix-length - The prefix length of the address range. allowAll - When set to `allowAll` and the associated area-id is `0.0.0.0`, aggregated Type-5 LSAs are generated for the specified range. In addition, aggregated Type-7 LSAs are generated in all the attached NSSAs for the specified range. denyAll - When set to denyAll, neither Type-5 LSA nor Type-7 LSAs are generated for the specified range. advertise - When the associated area-id is `0.0.0.0`, aggregated Type-5 LSAs are generated. Otherwise, if the associated area-id `is x.x.x.x` (other than `0.0.0.0`), aggregated Type-7 LSA is generated in NSSA area `x.x.x.x`. not-advertise - When the associated area-id is `0.0.0.0`, Type-5 LSA is not generated for the specified range, while all the NSSA LSAs within this range are flushed out and aggregated Type-7 LSA is generated in all attached NSSAs. If associated area-id `is x.x.x.x` (other than `0.0.0.0`), Type-7 LSA is not generated in NSSA `x.x.x.x` for the specified range. Translation - When set to enabled, the P-Bit is set in the generated Type-7 LSA. When set to disabled, the P-Bit is cleared in the generated Type-7 LSA for the range.
Mode | Router Configuration
Defaults | Translation - enabled advertise
Example | SEFOS(config-router)# area 0.0.0.0 summary-prefix 3ffe:5000::481d::5 80 allowall Translation enabled
Notes | The value `allowAll/denyall` is not valid for area-id other than `0.0.0.0`.

#### Related Commands

- show ipv6 ospf - area-range / summary-prefix - Displays either the list of all area address ranges information or all external summary address configuration information

### 8.1.15 `redistribute`

Configures the protocol from which the routes have to be redistributed into OSPFv3. The `no` form of the command disables the redistribution of routes from the given protocol into OSPFv3.

    redistribute {static | connected | ripng | bgp}

    no redistribute {static | connected | ripng | bgp}

Syntax Description | static - Advertises routes, configured statically in the OSPFv3 routing process. connected - Advertises directly connected networks routes in the OSPFv3 routing process. ripng - Advertises routes that are learnt by the RIP process in the OSPFv3 routing process. bgp - Advertises routes that are learnt by the BGP process in the OSPFv3 routing process.
Mode | Router Configuration
Example | SEFOS(config-router)# redistribute static
Notes | To configure Redistribution of routes from other protocols, the following steps must be performed. 1. Configure the router as ASBR. 2. Configure redistribution of routes from particular protocol. The above order must be maintained and ASBR setting must be done before enabling redistribution.

#### Related Commands

- ASBR Router - Configures the router as an ASBR

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.16 `passive-interface`

Sets the global default passive interface status. All the interfaces created after executing this command become passive interfaces. The `no` form of the command resets the global default passive interface status. All the interfaces created after executing this command become non-passive interfaces.

    passive-interface

    no passive-interface

Mode | Router Configuration
Defaults | Disabled.
Example | SEFOS(config-router)# passive-interface

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.17 `host - metric | area-id`

Configures a host entry with metric or area-id.

    host IPv6-address {metric cost} [area-id {area-id}]

    no host IPv6-address

Syntax Description | IPv6-address - IPV6 address prefix. metric - Metric to be advertised. area-id - A 32-bit integer.
Mode | Router Configuration
Example | SEFOS(config-router)# host 3ffe:481d::5 metric 10 area-id 0.0.0.1

#### Related Commands

- show ipv6 ospf host - Displays the host table information

### 8.1.18 `no area`

Deletes an area and does any one of the following based on the optional parameter.

- Coverts stub or nss area to normal area

- Deletes virtual link

- Deletes stub cost

- Deletes `area-range` or `summary-prefix` values

    no area area-id [{stub | nssa | virtual-link router-id | default-metric | {range {summary | Type7} | summary-prefix} IPv6-prefix prefix-length}]

Syntax Description | area-id - A 32-bit integer stub - Stub area. nssa - Not so stubby area. virtual-link - The Router ID of the virtual neighbor. default-metric - Cost for the default summary route in a stub/NSS area. range - Type-3 or Type-7 or external LSA range. IPv6-prefix - The IPv6 address prefix of the range. prefix-length - The prefix length of the address range.
Mode | Router Configuration
Example | SEFOS(config-router)# no area 1.1.1.1 SEFOS(config-router)# no area 1.1.1.1 stub SEFOS(config-router)# no area 1.1.1.1 default-metric SEFOS(config-router)# no area 1.1.1.1 virtual-link 20.0.0.3 SEFOS(config-router)# no area 1.1.1.1 range summary 3ffe:3010:481d::5 80
Notes | Before deleting an area, it is necessary to delete all the interfaces attached to that area.

#### Related Commands

- show ipv6 ospf areas - Displays the Area Table

- show ipv6 ospf - area-range / summary-prefix - Displays either the list of all area address ranges information or all external summary address configuration information

- `no` ipv6 ospf area - Disables OSPFv3 routing protocol on the interface

### 8.1.19 `no area - range`

Deletes an area-range. This command operates similar to that of the command no area.

    no area area-id range IPV6-prefix | prefix-length [{advertise | not-advertise}] [cost cost]

Syntax Description | area-id - Area identifier. This is a 32-bit integer. IPv6-prefix - The IPv6 address prefix of the range. prefix-length - The prefix length of the address range. advertise - Flushes out all the routes (LSAs) falling in the range and generates aggregated LSA for the range. not-advertise - Suppresses routes that match the prefix/prefix-length pair. cost - Metric or cost for a summary route, which is used during OSPF SPF calculation to determine the shortest paths to the destination. This value ranges between 0 and 16777215.
Mode | Router Configuration
Example | SEFOS(config-router)# no area 1.1.1.1 range 3ffe:3010:481d::5 / 80
Notes | All the interfaces attached to an area must be deleted before deleting an area.

#### Related Commands

- show ipv6 ospf areas - Displays the Area Table

- show ipv6 ospf - area-range / summary-prefix - Displays either the list of all area address ranges information or all external summary address configuration information

- `no` ipv6 ospf area - Disables OSPFv3 routing protocol on the interface

### 8.1.20 `nssaAsbrDfRtTrans`

This command enables setting of P bit in the default Type-7 LSA generated by an NSSA internal ASBR. The no form of the command disables setting of P bit in the default Type-7 LSA generated by an NSSA internal ASBR.

    nssaAsbrDfRtTrans

    no nssaAsbrDfRtTrans

Mode | Router Configuration
Defaults | Disabled
Example | SEFOS(config-router)# nssaAsbrDfRtTrans

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.21 `redist-config`

Configures the information to be applied to routes learnt from RTM. The `no` form of the command deletes the information applied to routes learnt from RTM.

    redist-config IPv6-prefix prefix-length [metric-value metric] [metric-type {asExttype1 | asExttype2}] [tag tag-value]

    no redist-config IPv6-prefix prefix-length

Syntax Description | IPv6-prefix - The IPv6 address prefix. prefix-length - The prefix length of the address. metric-value - The metric value applied to the route before it is advertised into the OSPFv3 Domain. metric-type - The metric type applied to the route before it is advertised into the OSPFv3 Domain. tag - The tag type describes whether tags will be automatically generated or will be manually configured.
Mode | Router Configuration
Example | SEFOS(config-router)# redist-config 3ffe:5000:481d::5 80 metric-value 30 metric-type asExttype1 tag 12

#### Related Commands

- show ipv6 ospf redist-config - Displays the configuration information to be applied to the routes learnt from the RTM

### 8.1.22 `as-external lsdb-limit`

Sets the maximum number of non-default AS-external-LSA entries that can be stored in the link-state database. If the value is -1, then there is no limit.

    as-external lsdb-limit lsdb-limit_-1-0x7fffffff

Mode | Router Configuration
Defaults | lsdb-limit - -1
Example | SEFOS(config-router)# as-external lsdb-limit 10
Notes | When the number of non-default AS-external-LSAs in a router’s link-state database reaches the configured limit, the router enters Overflow- State. The router never holds more than the configured non-default AS-external-LSAs in its database. The LSDB limit MUST be set identically in all routers attached to the OSPFv3 backbone and/or any regular OSPFv3 area. (i.e. OSPFv3 stub areas and NSSAs are excluded).

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

- exit-overflow-interval - Sets the number of seconds after which a router will attempt to leave the overflow state

### 8.1.23 `exit-overflow-interval`

Sets the number of seconds after which a router will attempt to leave the overflow state.

    exit-overflow-interval interval

Mode | Router Configuration
Defaults | interval - 0
Example | SEFOS(config-router)# exit-overflow-interval 10

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.24 `demand-extensions`

Enables routing support for demand routing. The `no` form of the command disables routing support for demand routing.

    demand-extensions

    no demand-extensions

Mode | Router Configuration
Defaults | Enabled.
Example | SEFOS(config-router)# demand-extensions

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.25 `reference-bandwidth`

Sets the reference bandwidth in kilobits per second for calculating the default interface metrics.

    reference-bandwidth ref-bw

Mode | Router Configuration
Defaults | ref-bw - 100,000 KBPS
Example | SEFOS(config-router)# reference-bandwidth 1000000

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.26 `auto-cost reference-bandwidth`

Sets the reference bandwidth in kilobits per second for calculating the default interface metrics. The `no` form of the command sets the reference bandwidth to the default value. This command operates similar to that of the command reference-bandwidth.

    auto-cost reference-bandwidth ref-bw

    no auto-cost reference-bandwidth

Syntax Description | ref-bw - Reference bandwidth (in kilobits per second) for calculating the default interface metrics.
Mode | Router Configuration
Defaults | ref-bw - 100,000 kbps.
Example | SEFOS(config-router)# auto-cost reference-bandwidth 1000000

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.27 `ipv6 ospf area`

Enables OSPFv3 for IPv6 on an interface. The `no` form of the command disables OSPFv3 routing protocol on the interface.

    ipv6 ospf area IPv4-address

    no ipv6 ospf

Syntax Description | IPv4-address - A 32-bit integer.
Mode | Router Configuration
Defaults | Disabled.
Example | SEFOS(config-if)# ipv6 ospf area 0.0.0.0
Notes | The `no` form of the command disables an interface and triggers flushing of self-originated link scope LSAs, and deletes the link scope LSAs associated with this interface from the link state database. If there is a single interface in the associated area, then this command deletes its area scope LSAs from the link state database.

#### Related Commands

- no area - range - Deletes an area

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.28 `ipv6 ospf demand-circuit`

Configures OSPFv3 to treat the interface as an OSPFv3 demand circuit. The command indicates whether demand OSPFv3 procedures (hello suppression to FULL neighbors and setting the `DoNotAge` flag on propagated LSAs) must be performed on the configured interface. The `no` form of the command disables the demand circuit on an interface.

    ipv6 ospf demand-circuit

    no ipv6 ospf demand-circuit

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | Disabled.
Example | SEFOS(config-if)# ipv6 ospf demand-circuit
Notes | The routing support for demand routing must have been enabled (using the demand-extensions command) prior to the execution of this command.

#### Related Commands

- demand-extensions - Enables routing support for demand routing

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.29 `ipv6 ospf retransmit-interval`

Sets the time between LSA retransmissions for adjacencies belonging to interface. The `no` form of the command sets the default retransmit interval for an interface.

    ipv6 ospf retransmit-interval interval

    no ipv6 ospf retransmit-interval

Syntax Description | Interface Configuration Applicable only in VLAN Interface.
Mode | Router Configuration
Defaults | interval - 5
Example | SEFOS(config-if)# ipv6 ospf retransmit-interval 10
Notes | The retransmit time interval is the number of seconds between the link-state advertisement retransmissions for adjacencies belonging to an interface. The retransmit-interval value is also used while retransmitting database description and link-state request packets.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.30 `ipv6 ospf transmit-delay`

Sets the estimated time taken to transmit LS update packet over a particular interface. The `no` form of the command sets the default transmit delay for an interface.

    ipv6 ospf transmit-delay 1-1800

    no ipv6 ospf transmit-delay

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | delay - 1
Example | SEFOS(config-if)# ipv6 ospf transmit-delay 10

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.31 `ipv6 ospf priority`

Sets the router priority, which helps to determine the designated router for this network. The `no` form of the command sets the default router priority for an interface.

    ipv6 ospf priority 1-255

    no ipv6 ospf priority

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | priority - 1
Example | SEFOS(config-if)# ipv6 ospf priority 7
Notes | A priority value of 0 signifies that the router is not eligible to become the designated router on a particular network.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.32 `no ipv6 ospf priority`

Sets the default router priority for an interface. This command operates similar to that of the command ipv6 ospf priority.

    no ipv6 ospf priority priority-value

Syntax Description | priority-value - Priority value of the router. A priority value of 0 signifies that the router is not eligible to become the designated router on a particular network.
Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | priority - 1
Example | SEFOS(config-if)# no ipv6 ospf priority 7

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.33 `ipv6 ospf hello-interval`

Specifies the time interval between the OSPFv3 hello packets on a particular interface (the length of time, in seconds, between the Hello packets that the router sends on the interface). The `no` form of the command sets the default hello interval for an interface.

    ipv6 ospf hello-interval seconds_1-65535

    no ipv6 ospf hello-interval

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | interval - 10
Example | SEFOS(config-if)# ipv6 ospf hello-interval 20
Notes | The hello interval value must be same for all routers attached to a common link.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.34 `ipv6 ospf dead-interval`

Configures the router dead interval. The command is configured in seconds and indicates the time period for which the router waits for hello packet from the neighbor before declaring this neighbor down. The `no` form of the command sets the interface dead interval to default value.

    ipv6 ospf dead-interval seconds_1-65535

    no ipv6 ospf dead-interval

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | interval - 40
Example | SEFOS(config-if)# ipv6 ospf dead-interval 50
Notes | This value must be a multiple of the hello interval and must be same for all routers attached to a common link.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.35 `ipv6 ospf poll-interval`

Configures the larger time interval, in seconds, between the hello packets sent to an inactive non-broadcast multi-access neighbor. The `no` form of the command sets the default poll interval for an interface.

    ipv6 ospf poll-interval seconds_1-65535

    no ipv6 ospf poll-interval

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | interval - 120
Example | SEFOS(config-if)# ipv6 ospf poll-interval 30

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.36 `ipv6 ospf metric`

Explicitly specifies the metric value for sending a packet on an interface. The `no` form of the command sets the default value for the interface metric.

    ipv6 ospf metric 1-65535

    no ipv6 ospf metric

Mode | Interface Configuration This command is applicable only in VLAN Interface.
Defaults | metric - 10
Example | SEFOS(config-if)# ipv6 ospf metric 20

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.37 `ipv6 ospf network`

Sets the network type for an interface. The `no` form of the command sets the default value for the network type.

    ipv6 ospf network {broadcast | non-broadcast | point-to-multipoint | point-to-point}

    no ipv6 ospf network

Syntax Description | broadcast - Networks supporting many (more than two) attached routers, together with the capability to address a single physical message to all of the attached routers (broadcast). non-broadcast - Networks supporting many (more than two) routers, but having no broadcast capability. point-to-multipoint - Treats the non-broadcast network as a collection of point-to-point links. point-to-point - A network that joins a single pair of routers.
Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | broadcast
Example | SEFOS(config-if)# ipv6 ospf network non-broadcast
Notes | If the Interface Network type is NBMA or Point-to-Multipoint, neighbor must be configured. When there are few configured neighbors on the interface, then both network type change command and the no form of the command do not succeed.

#### Related Commands

- show ipv6 ospf neighbor - Configures a neighbor on non-broadcast networks and sets the priority value for the neighbor if specified

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.38 `ipv6 ospf neighbor`

Configures a neighbor on non-broadcast networks and sets the priority value for the neighbor if specified. The `no` form of the command deletes a configured neighbor or sets the default priority value (if the priority option is specified).

    ipv6 ospf neighbor IPv6-address [priority 1-255]

    no ipv6 ospf neighbor IPv6-address [priority 1-255]

Syntax Description | IPv6-address - IPv6 Address prefix. priority - A number that specifies the router priority.
Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | priority - 1
Example | SEFOS(config-if)# ipv6 ospf neighbor fe80::220:35ff:fe43:6020 priority 2
Notes | In the OSPFv3 protocol packets, the IPv6 address indicates the source address of the neighbor. The link local address of the neighbor must be used for this field. Neighbors can be configured only in NBMA networks and point-to-multipoint networks.

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

- show ipv6 ospf neighbor - Displays OSPFv3 neighbors information

### 8.1.39 `ipv6 ospf passive-interface`

Configures an OSPFv3 interface to be passive. The execution of the command results in suppressing OSPFv3 protocol packets traffic on this interface. The `no` form of the command configures an OSPFv3 interface to be non-passive.

    ipv6 ospf passive-interface

    no ipv6 ospf passive-interface

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | Disabled
Example | SEFOS(config-if)# ipv6 ospf passive-interface

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3 related interface information

### 8.1.40 `ipv6 ospf neighbor probing`

Enables neighbor probing on demand-circuit enabled interface. The no form of the command disables neighbor probing on demand-circuit enabled interface.

    ipv6 ospf neighbor probing

    no ipv6 ospf neighbor probing

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | Disabled.
Example | SEFOS(config-if)# ipv6 ospf neighbor probing

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.41 `ipv6 ospf neighbor-probe retransmit-limit`

Sets the number of consecutive LSA retransmissions before the neighbor is deemed inactive. The `no` form of the command sets the default neighbor probe retransmission limit.

    ipv6 ospf neighbor-probe retransmit-limit retrans-limit

    no ipv6 ospf neighbor-probe retransmit-limit

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | retrans-limit - 10
Example | SEFOS(config-if)# ipv6 ospf neighbor-probe retransmit-limit 30

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.42 `ipv6 ospf neighbor-probe interval`

Sets the number of seconds, that indicates how often neighbor will be probed. The `no` form of the command sets the default neighbor probe interval.

    ipv6 ospf neighbor-probe interval interval

    no ipv6 ospf neighbor-probe interval

Mode | Interface Configuration Applicable only in VLAN Interface.
Defaults | interval - 120
Example | SEFOS(config-if)# ipv6 ospf neighbor-probe interval 200

#### Related Commands

- show ipv6 ospf interface - Displays the OSPFv3-related interface information

### 8.1.43 `debug ipv6 ospf - pkt`

Sets the trace levels.

    debug ipv6 ospf [pkt ([{high | low | hex}] [hp] [ddp] [lrq] [lsu] [lsa])] [level ([fn_entry] [fn_exit] [critical] [mem_alloc_succ] [mem_alloc_fail])] [module ([ppp] [rtm] [nssa] [rt_aggrg] [adj_formation] [lsdb]  [ism] [nsm] [rt_calc] [interface] [config])]

    no debug ipv6 ospf [ pkt  ([{high | low | hex}] [hp] [ddp] [lrq] [lsu] [lsa])] [level ([fn_entry] [fn_exit] [critical] [mem_alloc_succ]  [mem_alloc_fail])] [module ([ppp] [rtm] [nssa] [rt_aggrg] [adj_formation] [lsdb] [ism] [nsm] [rt_calc] [interface] [config])]

Syntax Description | pkt - Packet high level dump debug messages. high - Packet high level dump trace. low - Packet low level dump trace. hex - Packet hex dump trace. hp - Hello packet trace. ddp - DDP packet trace. lrq - Link state request packet trace. lsu - Link state update packet trace. lsa - Link state acknowledge packet trace. level - Trace level debug messages. fn_entry - Function entry trace. fn_exit - Function exit trace. critical - Critical trace. mem_alloc_succ - Memory allocation success trace. mem_alloc_fail - Memory allocation failure trace. module - OSPFv3 module debug messages. ppp - Protocol packet processing trace. rtm - RTM module trace. nssa - NSSA trace.
Mode | Privileged EXEC
Defaults | Debugging is disabled.
Example | SEFOS# debug ipv6 ospf pkt high hp level fn_entry module ppp

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.44 `debug ipv6 ospf`

Sets the IPv6 OSPF trace levels. The `no` form of the command resets the IPv6 OSPF trace levels. This command operates similar to the command debug ipv6 ospf - pkt.

    debug ipv6 ospf {adj | ipsec | database-timer | flood | hello | lsa-gen | retransmission | lsdb | spf statistic}

    no debug ipv6 ospf {adj | ipsec | database-timer | flood | hello | lsa-gen | retransmission | lsdb}

Syntax Description | adj - Adjacency information. ipsec - The interaction between OSPF and IPSec in IPv6 networks, including creation and removal of policy definitions. database-timer - Database-timer information. flood - Flooding information. hello - Hello packet information. lsa-gen - Link-state advertisement (LSA) generation information for all LSA types. retransmission - Retransmission information. lsdb - Link state database information. spf statistic - Shortest path first statistics information.
Mode | Privileged EXEC
Defaults | Debugging is disabled.
Example | SEFOS# debug ipv6 ospf adj

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.45 `debug ipv6 ospf - packet | events`

Sets the IPv6 OSPF event trace. The `no` form of the command resets the IPv6 OSPF event trace. This command operates similar to that of the command debug ipv6 ospf - pkt.

    debug ipv6 ospf {packet | events}

    no debug ipv6 ospf {packets | events}

Syntax Description | packet - Received OSPFv3 packet information. events - OSPFv3-related events information.
Mode | Privileged EXEC
Defaults | Debugging is disabled.
Example | SEFOS# debug ipv6 ospf adj

#### Related Commands

- show ipv6 ospf - General Information - Displays general information about the OSPFv3 routing process

### 8.1.46 `show ipv6 ospf interface`

Displays the OSPFv3-related interface information.

    show ipv6 ospf interface [vlan 1-4094]

Syntax Description | vlan - VLAN identifier.
Mode | User/Privileged EXEC
Example | SEFOS# show ipv6 ospf interface vlan 1 OSPFv3 Interface Information Interface Name: vlan2 Interface Id: 1 Area Id: 0.0.0.0 Local Address: fe80::211:22ff:fe33:4412 Router Id: 11.0.0.2 Network Type: BROADCAST Cost: 10 State: WAITING Designated Router Id: 0.0.0.0 local address: (null) Backup Designated Router Id: 0.0.0.0 local address: (null) Transmit Delay: 1 sec Priority: 1 IfOptions: 0x0 Timer intervals configured: Hello: 10, Dead: 40, Retransmit: 5, Poll: 120 Demand Circuit: Disable Neighbor Probing: Disable Nbr Probe Retrans Limit: 10 Nbr Probe Interval: 120 Hello due in 4 sec Neighbor Count is: 1 Adjacent with the neighbor 11.0.0.1

#### Related Commands

- area - virtual-link - Sets the Virtual Link between Areas

- ipv6 ospf area - Enables OSPFv3 for IPv6 on an interface

- ipv6 ospf demand-circuit - Configures OSPFv3 to treat the interface as an OSPFV3 demand circuit

- ipv6 ospf retransmit-interval - Sets the time between LSA retransmissions for adjacencies belonging to an interface

- ipv6 ospf transmit-delay - Sets the estimated time taken to transmit LS update packet over a particular interface

- ipv6 ospf priority - Sets the router priority, which helps to determine the Designated Router for this network

- no ipv6 ospf priority - Sets the default router priority for an interface

- ipv6 ospf hello-interval - Specifies the time interval between the OSPFv3 hello packets on a particular interface

- ipv6 ospf dead-interval - Configures the router dead interval

- ipv6 ospf poll-interval- Configures the larger time interval, in seconds, between the Hello packets sent to an inactive non-broadcast multi-access neighbor

- ipv6 ospf metric- Specifies the metric value for sending a packet on an interface

- ipv6 ospf network - Sets the network type for an interface

- ipv6 ospf neighbor - Configures a neighbor on non-broadcast networks and sets the priority value for the neighbor if specified

- ipv6 ospf passive-interface - Configures an OSPFv3 interface to be Passive

- ipv6 ospf neighbor probing - Enables neighbor probing on demand-circuit enabled interface

- ipv6 ospf neighbor-probe retransmit-limit - Sets the number of consecutive LSA retransmissions before the neighbor is deemed inactive

- ipv6 ospf neighbor-probe interval - Sets the number of seconds, that indicates how often neighbor will be probed

### 8.1.47 `show ipv6 ospf neighbor`

Displays OSPFv3 neighbor information.

    show ipv6 ospf neighbor [neighbor-router-id]

Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf neighbor ID PriStateDead Address Time 11.0.0.41FULL/PTOP 31 fe80::211:22ff:fe33:4434 11.0.0.510FULL/BACKUP 35 fe80::260:83ff:fe38:8aa2

#### Related Commands

- ipv6 ospf neighbor - Configures a neighbor on non-broadcast networks and sets the priority value for the neighbor if specified

### 8.1.48 `show ipv6 ospf - request/retrans-list`

Displays the list of all LSAs in request-list or in retransmission-list.

    show ipv6 ospf {request-list | retrans-list} [neighbor-router-id]

Syntax Description | request-list - The list of link state advertisements for which the neighbor has more up-to-date instances. retrans-list - The list of link state advertisements that have been sent but not acknowledged. neighbor-router-id - Neighbor router identifier.
Mode | User/Privileged EXEC
Example | SEFOS# show ipv6 ospf retrans-list NeighborId 20.0.0.3, Nbr Address fe80::220:35ff:fe43:6020 Type LsId AdvRtr SeqNo Age Checksum 0x2001 0.0.0.2 11.0.0.2 0x80000011 0 0xcddf SEFOS# show ipv6 ospf request-list Neighbor 20.0.0.3, Address fe80::220:35ff:fe43:6020 Type LSID ADVRTR SeqNo Age Checksum 8193 0.0.0.1 11.0.0.3 0x80000002 6 0x1211

### 8.1.49 `show ipv6 ospf virtual-links`

Displays the parameters and the current state of OSPFv3 virtual links.

    show ipv6 ospf virtual-links

Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf virtual-links Interface State: PointToPoint, Neighbor State: FULL Transit Area: 2.2.2.2, Virtual Neighbor: 11.0.0.7 Intervals Configured for the Virtual Interface: Hello: 10, Dead: 60, Transit: 1, Retransmit : 20

#### Related Commands

- area - virtual-link - Sets the virtual link between Areas

### 8.1.50 `show ipv6 ospf border-routers`

Displays the internal OSPFv3 routing table entries to an ABR or ASBR.

    show ipv6 ospf border-routers

Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf border-routers OSPFv3 Process Border Router Information Destination Type NextHop Cost Rt Area Type Id 11.0.0.2 ABR fe80::211:22ff:fe33:4412 10 intraArea 0.0.0.0 11.0.0.2 ABR fe80::211:22ff:fe33:4422 10 intraArea 0.0.0.1 11.0.0.2 ASBR fe80::211:22ff:fe33:4412 10 intraArea 0.0.0.0 11.0.0.2 ASBR fe80::211:22ff:fe33:4422 10 intraArea 0.0.0.0

#### Related Commands

- abr-type - Sets the ABR type

- ASBR Router - Configures the router as an ASBR

### 8.1.51 `show ipv6 ospf - area-range / summary-prefix`

Displays either the list of all area address ranges information or all external summary address configuration information.

    show ipv6 ospf {area-range | summary-prefix}

Syntax | area-range - Area associated with the OSPFv3 address range. summary-prefix - Aggregate addresses for OSPFv3.
Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf area-range OSPFv3 Summary Address Configuration Information Network Pfx LSA Area Effect Tag Length Type 3ffe::100:0:0:0 80 Summary 0.0.0.0 advertise 0 3ffe::110:0:0:0 80 Summary 0.0.0.0 doNotAdvertise 0 3ffe::120:0:0:0 80 Summary 0.0.0.1 advertise 0 3ffe::130:0:0:0 80 Type7 0.0.0.1 advertise 0 SEFOS# show ipv6 ospf summary-prefix OSPFv3 External Summary Address Configuration Information Prefix Pfx Area-id Effect TranslationState Length 3ffe::200:0:0:0 80 0.0.0.0 advertise enabled 3ffe::210:0:0:0 80 0.0.0.0 advertise disabled 3ffe::220:0:0:0 80 0.0.0.0 doNotAdvertise enabled 3ffe::230:0:0:0 80 0.0.0.0 allowAll enabled 3ffe::240:0:0:0 80 0.0.0.0 denyAll enabled

#### Related Commands

- area - range - Creates the internal aggregation address range

- area - range - cost - Summarizes routes at an area boundary

- area - summary-prefix - Enables route aggregation or filtering while importing routes in the OSPFv3 domain

- no area / no area - range - Deletes an area

### 8.1.52 `show ipv6 ospf` - General Information

Displays general information about OSPFv3 routing process.

    show ipv6 ospf

Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf Router Id: 11.0.0.1 ABR Type: Standard ABR SPF schedule delay: 5 secs Hold time between two SPFs: 10 secs Exit Overflow Interval: 0 Ref BW: 100000000 Ext Lsdb Limit: -1 Trace Value: 0x00000800 As Scope Lsa: 0 Checksum Sum: 0x0 Demand Circuit: Enable Passive Interface: Disable Nssa Asbr Default Route Translation: Disable Autonomous System Boundary Router Number of Areas in this router 2 Area 0.0.0.0 Number of interfaces in this area is 1 Number of Area Scope Lsa: 4 Checksum Sum: 0x1210e Number of Indication Lsa: 0 SPF algorithm executed: 6 times Area 0.0.0.1 Number of interfaces in this area is 1 Number of Area Scope Lsa: 3 Checksum Sum: 0x18d41 Number of Indication Lsa: 0 SPF algorithm executed: 2 times

#### Related Commands

- router-id - IPv4-address - Sets a fixed router identifier

- timers spf - Configures the delay time and the hold time between two consecutive SPF calculations

- abr-type - Sets the ABR type

- ASBR Router - Configures the router as an ASBR

- passive-interface - Sets the global default passive interface status

- nssaAsbrDfRtTrans - Enables setting of P bit in the default Type-7 LSA generated by an NSSA internal ASBR

- as-external lsdb-limit - Sets the maximum number of non-default AS-external-LSAs entries that can be stored in the link-state database

- exit-overflow-interval - Sets the number of seconds after which a router will attempt to leave the Overflow State

- demand-extensions - Enables routing support for demand routing

- reference-bandwidth / auto-cost reference-bandwidth - Sets the reference bandwidth in kilobits per second for calculating the default interface metrics

- ipv6 ospf area - Enables OSPFv3 for IPv6 on an interface

- debug ipv6 ospf - pkt - Sets the trace levels

- debug ipv6 ospf - Sets the IPv6 OSPF trace levels

- debug ipv6 ospf - packet | events - Sets the IPv6 OSPF event trace

### 8.1.53 `show ipv6 ospf` - LSA Database

Displays the LSA information.

    show ipv6 ospf [area area-id] database [{router | network | as-external | inter-prefix | inter-router | intra-prefix | link | nssa}] [{detail | HEX}]

Syntax Description | area - A 32-bit integer. database - Displays the number of each type of LSA for each area in the database. router - Router LSAs. network - Network LSAs. as-external - AS-external LSAs. inter-prefix - Inter-prefix LSAs. inter-router - Inter-router LSAs. intra-prefix - Intra-prefix LSAs. link - Link State LSAs. nssa - NSSA LSAs. detail - Displays the LSAs information in detail. HEX - Displays the LSAs information in hexadecimal format.
Mode | User/Privileged EXEC
Example | SEFOS# show ipv6 ospf database Area-id RtrId LsaType Age Seq# Checksum 0.0.0.0 11.0.0.1 0x0008 300 0x80000002 0x323f 0.0.0.0 11.0.0.2 0x0008 300 0x80000001 0xa426 0.0.0.0 11.0.0.1 0x2001 1 0x80000003 0x3b9a
| 0.0.0.0 11.0.0.2 0x2001 0 0x80000006 0x2fa2 0.0.0.0 11.0.0.2 0x2002 0 0x80000001 0x6081 0.0.0.0 11.0.0.2 0x2009 0 0x80000002 0x504c
| SEFOS# show ipv6 ospf database detail Age: 0 Seconds LS Type: Router Lsa Link State Id: 0.0.0.0 Adv Rtr Id: 12.0.0.2 Sequence: 0x80000001 Checksum: 0x7c85 Length: 24 Router is an AS Boundary Router Number of Links: 0 Options: 0x33
| Age: 0 Seconds LS Type: Intra Area Prefix Lsa Link State Id: 0.0.0.0 Adv Rtr Id: 12.0.0.2 Sequence: 0x80000001 Checksum: 0x4966 Length: 52 #Prefixes: 1 Referenced LS Type: Router Lsa Ref Link State Id: 0.0.0.0 Ref Adv Router: 12.0.0.2 Prefix Length (Bytes): 16 Prefix Options: 0x00 Metric: 0xa Prefix: 3ffe:481d::5
| SEFOS# show ipv6 ospf database hex 00 00 00 08 00 00 00 02 0b 00 00 01 80 00 00 02 e9 d0 00 2c 01 00 00 33 fe 80 00 00 00 00 00 00 02 11 22 ff fe 33 44 21 00 00 00 00 00 07 00 08 00 00 00 02 0b 00 00 02 80 00 00 02 f9 be 00 2c 01 00 00 33 fe 80 00 00 00 00 00 00 02 11 22 ff fe 33 44 22 00 00 00 00
| 00 00 20 01 00 00 00 00 0b 00 00 01 80 00 00 01 fe e2 00 28 00 00 00 33 01 00 00 02 00 00 00 02 00 00 00 02 0b 00 00 02 00 06 20 01 00 00 00 00 0b 00 00 02 80 00 00 03 e7 f4 00 28 03 00 00 33 01 00 00 02 00 00 00 02 00 00 00 02 0b 00 00 01

### 8.1.54 `show ipv6 ospf route`

Displays routes learned by the OSPFv3 process.

    show ipv6 ospf route

Mode | User or Privileged EXEC
Example | SEFOS# show ipv6 ospf route OSPFV3 Process Routing Table Dest/Prefix-Length NextHop/IfIndex Cost Rt.Type Area 3333::/96 fec0::4444:0:2/vlan4 10 type2Ext 0.0.0.0 fec0::3003:0:0/96 :: /vlan5 1 intraArea 0.0.0.4 fec0::4444:0:0/96 :: /vlan4 1 intraArea 0.0.0.3

#### Related Commands

- ipv6 router ospf - Enables the OSPFv3 routing protocol

- router-id - IPv4-address - Sets a fixed router ID

### 8.1.55 `show ipv6 ospf areas`

Displays the area table.

    show ipv6 ospf areas

Mode | Useror Privileged EXEC
Example | SEFOS# show ipv6 ospf areas OSPFV3 AREA CONFIGURATION INFORMATION AreaId: 0.0.0.0 Area Type: NORMAL AREA Spf Calculation: 3 (times) Area Bdr Rtr Count: 1 As Bdr Rtr Count: 0 Area Summary: Send Summary Area-id: 0.0.0.1 Area Type: NSS AREA Spf Calculation: 0 (times) Area Bdr Rtr Count: 1 As Bdr Rtr Count: 0 Area Summary: Send Summary Stub Metric: 0x1 Stub Metric Type: 1 Translator Role: Candidate Translator State: Disabled Nssa Stability Interval: 40

#### Related Commands

- area - stub | nssa - Defines an area as a stub area or an NSSA

- area - stability-interval - Configures the stability interval (in seconds) for the NSSA

- area - translation-role - Configures the translation role for NSSA

- no area / no area - range - Deletes an area

### 8.1.56 `show ipv6 ospf host`

Displays the host table information.

    show ipv6 ospf host

Mode | User/Privileged EXEC
Example | SEFOS# show ipv6 ospf host OSPFv3 HOST CONFIGURATION Information Address Area-id StubMetric 3ffe::80:0:1 0.0.0.0 30

#### Related Commands

- host - metric | area-id - Configures a host entry with metric and area-id

### 8.1.57 `show ipv6 ospf redist-config`

Displays the configuration information to be applied to the routes learnt from the RTM.

    show ipv6 ospf redist-config

Mode | User/Privileged EXEC
Example | SEFOS# show ipv6 ospf redist-config Address Prefix PfxLength MetricType Metric TagType TagValue 3ffe:: 64 asExt Type2 10 manual 10

#### Related Commands

- redist-config - Configures the information to be applied to routes learnt from RTM

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