C H A P T E R 16

DCB

DCB is a term commonly used to describe Ethernet enhancements to improve Ethernet networking and management in the data center environments. The DCB framework defines these enhancements required for switches and endpoints and includes the following features:

- Priority Groups (PG)

Also known as Enhancement Transmission Selection ETS (IEEE definition). The priority grouping specification provides bandwidth management and a scheduling algorithm for various traffic classes on a converged link.

- Priority-based Flow Control (PFC)

PFC is an enhancement to the existing Ethernet pause protocol. This feature allows "no-drop" packet delivery for certain traffic classes.

The DCB features are discovered and exchanged using Data Center Exchange Protocol (DCBX). DCBX uses LLDP (Link Layer Discovery Protocol) to exchange parameters between two DCB enabled link peers. In addition to the type, length, and value (TLV) attributes described in the LLDP chapter, DCBX TLVs can also be advertised over an LLDP enabled link to the peer. The DCBX capabilities (PG and PFC) exchanged with a link partner become the operational configuration and are passed to the QoS management subsystem for configuring the hardware.

The SEFOS DCB for this release supports DCB version 1.0.1 which was specified by the DCB Task Group.

### 16.0.1 Priority Group Feature (PG)

The purpose of PG (ETS) is to allocate link bandwidth based on the priority group setting on a link. Different traffic types may have different network bandwidth requirements. For example, priority 7 can be assigned to a priority group that does not require a bandwidth limitation.

### 16.0.2 Priority Flow Control Feature (PFC)

This PFC feature is important to provide "no-drop" packet delivery for certain traffic classes while maintaining existing LAN behavior for other traffic classes on a converged link. Priority 3 is enabled by default for the flow control. To efficiently use the switch resources, the switch allows up to two priorities for Ethernet priority pause. The Ethernet pause is applied to the PFC packets only.

### 16.0.3 Application Protocol Feature

This application protocol feature allows the DCB node to advertise the upper layer protocols and associated priority mapping over a DCB link. Since SEFOS switch is only a DCB capable switch and it is not a FCoE capable switch, the only protocol supported is the EtherType for layer 2 protocols. Its main purpose is to advertise its capability to the link partner which is a CNA (converged network adapter) port and the host runs FCoE over this CNA link. The priority mapping is taken from what the PFC feature is configured.

The following table shows the default setting for PG, PFC and Application.

Priority | Priority Group | PG Bandwidth Allocation (%) | Priority Flow Control | Application Priority Mapping
--- | --- | --- | --- | ---
0 | 0 | 50 | disable | disable
1 | 0 | 50 | disable | disable
2 | 0 | 50 | disable | disable
3 | 1 | 30 | disable | disable
4 | 2 | 20 | disable | disable
5 | 2 | 20 | disable | disable
6 | 2 | 20 | disable | disable
7 | 15 | unrestricted | disable | disable

##

16.1 DCB Commands

The list of DCB commands is as follows:

- shutdown dcb

- set dcb {enable | disable}

- set dcb priority-group {enable | disable}

- set dcb priority-group mode

- set dcb priority-group

- set dcb priority-flow-control {enable | disable}

- set dcb priority-flow-control mode

- set dcb priority-flow-control vlan-priority

- set dcb application-etype-fcoe

- lldp tlv-select dcb1tlv

- show dcb global info

- show interfaces dcb priority-group

- show interfaces dcb priority-flow-control

- show interfaces dcb application-etype-fcoe

- show interfaces dcb counters

- clear interfaces dcb counters

### 16.1.1 `shutdown dcb`

Shutdowns DCB in the switch. The `no` form of this command starts DCB in the switch.

    shutdown dcb

    no shutdown dcb

Mode | Global Configuration
Default | DCB is shutdown.
Example | SEFOS(config)# no shutdown dcb SEFOS(config)# shutdown dcb
Notes | For DCB features to be advertised, LLDP must be started and enabled.

#### Related Commands

- show dcb global info - Displays DCB global information

- show lldp- Displays LLDP Global Configuration details

### 16.1.2 `set dcb {enable | disable}`

Enables and disables the DCB feature on a specific interface.

    set dcb {enable | disable}

Syntax Description | enable - Enables DCB on the port. disable - Disables DCB on the port.
Mode | Interface Configuration
Default | Disabled.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb enable SEFOS(config-if)# set dcb disable
Notes | DCB must be enabled before any of the DCB features can be advertised.

#### Related Commands

- show interfaces dcb mode - Displays the interface DCB parameters

- show interfaces dcb priority-group - Displays the PG parameters

- show interfaces dcb priority-flow-control - Displays the PFC parameters

- show interfaces dcb application-etype-fcoe - Displays the Application parameters

### 16.1.3 `set dcb priority-group {enable | disable}`

Enables and disables the priority group feature on the port.

    set dcb priority-group {enable | disable}

Syntax Description | enable - Enables PG on the port. disable - Disables PG on the port.
Mode | Interface Configuration
Default | Enabled.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-group enable SEFOS(config-if)# set dcb priority-group disable
Notes | PG must be enabled for using the priority group feature.

#### Related Commands

- shutdown dcb - Shuts down DCB capability

- set dcb priority-group mode - Configures PG mode for the port

- set dcb priority-group - Sets the priority grouping ID for vlan priorities

- show interfaces dcb mode - Displays the interface DCB parameters

- show interfaces dcb priority-group - Displays the PG parameters

### 16.1.4 `set dcb priority-group mode`

Configures the PG mode for the port.

    set dcb priority-group mode {auto | on | off}

Syntax Description | auto - Feature on after PG DCBX protocols are exchanged. on - Force-enable the PG. off - PG feature is off.
Mode | Interface Configuration
Default | auto
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-group mode auto
Notes | In normal operation, this command is not required to run since its default is auto.

#### Related Commands

- set dcb priority-group - Configures the priority grouping ID for vlan priorities

- show interfaces dcb mode - Display the PG mode for the port

- show interfaces dcb priority-group - Display the PG parameters

### 16.1.5 `set dcb priority-group`

Sets the priority grouping identifier for eight priorities and priority group percentage of link bandwidth.

    set dcb priority-group priority0-pgid_0-15 priority1-pgid_0-15 priority2-pgid_0-15 priority3-pgid_0-15 priority4-pgid_0-15 priority5-pgid_0-15 priority6-pgid_0-15 priority7-pgid_0-15 bandwidth prioritygroup0-bw_0-100 prioritygroup1-bw_0-100 prioritygroup2-bw_0-100 prioritygroup3-bw_0-100 prioritygroup4-bw_0-100 prioritygroup5-bw_0-100 prioritygroup6-bw_0-100 prioritygroup7-bw_0-100

Syntax Description | priority0-pgid_0-15 - Priority group ID of priority 0. priority1-pgid_0-15 - Priority group ID of priority 1. priority2-pgid_0-15 - Priority group ID of priority 2. priority3-pgid_0-15 - Priority group ID of priority 3. priority4-pgid_0-15 - Priority group ID of priority 4. priority5-pgid_0-15 - Priority group ID of priority 5. priority6-pgid_0-15 - Priority group ID of priority 6. priority7-pgid_0-15 - Priority group ID of priority 7. Bandwidth - Percentage of link bandwidth. Total bandwidth must be added up to 100%. prioritygroup0-bw_0-100 - Percentage of link bandwidth allocated to PG 0. prioritygroup1-bw_0-100 - Percentage of link bandwidth allocated to PG 1. prioritygroup2-bw_0-100 - Percentage of link bandwidth allocated to PG 2. prioritygroup3-bw_0-100 - Percentage of link bandwidth allocated to PG 3. prioritygroup4-bw_0-100 - Percentage of link bandwidth allocated to PG 4. prioritygroup5-bw_0-100 - Percentage of link bandwidth allocated to PG 5. prioritygroup6-bw_0-100 - Percentage of link bandwidth allocated to PG 6. prioritygroup7-bw_0-100 - Percentage of link bandwidth allocated to PG 7.
Mode | Interface Configuration
Default | Four priority groups are defined as default: priority 0, 1, 2 - PG group 0. priority 3 - PG group 1. priority 4, 5, 6 - PG group 2. priority 7 - PG group 15 (no limit on bandwidth). Bandwidth: priority group 0 - 50%. priority group 1 - 30%. priority group 2 - 20%. priority group 15 - Unrestricted priority group.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-group 0 0 0 1 2 2 2 2
Notes | The priority group ID values from 0 to 7 can be used for groups which require bandwidth allocation. Priority group 15 is used for unrestricted group. The priority group ID assigned must be entered in sequence except group ID 15 which is an unrestricted group. For example, the assignment of "1 0 0 0 0 0 0 2" is not allowed.

#### Related Commands

- show interfaces dcb priority-group - Displays PG parameters

- set dcb priority-group {enable | disable} - Enables or disables PG feature

- set dcb priority-group mode - Configures PG mode

- show interfaces dcb mode - Displays PG mode

### 16.1.6 `set dcb priority-flow-control {enable | disable}`

Enables and disables the priority flow control feature on the port.

    set dcb priority-flow-control {enable | disable}

Syntax Description | enable - Enables PFC on the port. disable - Disables PFC on the port.
Mode | Interface Configuration
Default | Disabled.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-flow-control enable SEFOS(config-if)# set dcb priority-flow-control disable
Notes | PFC must be enabled for using the priority flow control feature.

#### Related Commands

- shutdown dcb - Shutdowns DCB capability

- set dcb priority-flow-control mode - Configures PFC mode

- set dcb priority-flow-control vlan-priority - Configures PFC parameters

- show interfaces dcb mode - Displays the interface DCB parameters

- show interfaces dcb priority-flow-control - Displays PFC parameters

### 16.1.7 `set dcb priority-flow-control mode`

Configures PFC mode for the port.

    set dcb priority-flow-control mode {auto | on | off}

Syntax Description | auto - Feature on after PG DCBX protocols are exchanged. on - Force-enable the PFC feature. off - PFC feature is off.
Mode | Interface Configuration
Default | auto
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-flow-control mode auto
Notes | In normal operation, this command is not required to run because its default is auto.

#### Related Commands

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- show interfaces dcb mode - Display the PFC mode

- show interfaces dcb priority-flow-control - Display the PFC parameters

### 16.1.8 `set dcb priority-flow-control vlan-priority`

Configures the priority flow control.

    set dcb priority-flow-control vlan-priority priority_0-1 priority_0-1 priority_0-1 priority_0-1 priority_0-1 priority_0-1 priority_0-1 priority_0-1

Syntax Description | Vlan-priority - VLAN priority to be priority flow control. priority_0-1: 0 - No priority flow control. 1 - Enables the priority pause.
Default | vlan priority 3
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb priority-flow-control vlan-priority 0 0 0 1 0 0 0 0
Notes | In normal operation, this command is not required since the default is priority 3.

#### Related Commands

- set dcb priority-flow-control {enable | disable} - Enables or disables PFC feature

- set dcb priority-flow-control mode - Configures the PFC mode

- show interfaces dcb mode - Displays the PFC mode

- show interfaces dcb priority-flow-control - Displays PFC parameters

### 16.1.9 `set dcb application-etype-fcoe`

Enables and disables the layer 2 Ethertype for FcoE protocol.

    set dcb application-etype-fcoe {enable | disable}

Mode | Interface Configuration
Default | Enabled.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# set dcb application-etype-fcoe enable
Notes | This command is mainly used when the switch port is connected to a host CNA (Converged Network Adapter) port which is capable of running FCoE (Fiber channel over Ethernet) and the host interface is configured to run FCoE.

#### Related Commands

- shutdown dcb - Shutdowns DCB capability

- set dcb application-etype-fcoe - Displays application fcoe ethertype parameter

- show interfaces dcb mode - Displays DCB mode

### 16.1.10 `lldp tlv-select dcb1tlv`

Configures DCBX TLV (type, length, value) types to be transmitted on a port. The `no` form of the command disables the transmission of DCBX TLV types on a port.

    lldp tlv-select dcb1tlv {[priority-group] [priority-flow-control] [application-etype-fcoe]}

    no lldp tlv-select dcb1tlv {[priority-group] [priority-flow-control] [application-etype-fcoe]}

Syntax Description | priority-group - PG TLV. priority-flow-control - PFC TLV. application-etype-fcoe - Application TLV.
Mode | Interface Configuration
Default | All three TVLs are enabled.
Example | SEFOS(config)# interface extreme-ethernet 0/18 SEFOS(config-if)# lldp tlv-select dcb1tlv priority-group priority-flow-control application-etype-fcoe SEFOS(config-if)# no lldp tlv-select dcb1tlv priority-group priority-flow-control application-etype-fcoe SEFOS(config-if)# no lldp tlv-select dcb1tlv application-etype-fcoe SEFOS(config-if)# lldp tlv-select dcb1tlv priority-flow-control
Notes | Currently, all three DCB TLVs must be entered in order as shown in the above example. The first TLV is `priority-group` and followed by `priority-flow-control` and `application-etype-fcoe`.

#### Related Commands

- show lldp - Displays LLDP Global Configuration details

- show lldp neighbors - Displays information about neighbors learned on an interface or all interfaces

### 16.1.11 `show dcb global info`

Displays DCB Global Configuration.

    show dcb global info

Mode | Privileged EXEC
Example | SEFOS# show dcb global info DCB Global Information ---------------------- System Control : Start

#### Related Commands

- show interfaces dcb priority-group - Displays the PG parameters

- show interfaces dcb priority-flow-control - Displays PFC parameters

- show interfaces dcb application-etype-fcoe - Displays application Ethertype parameters

- shutdown dcb - shutdowns the DCB

### 16.1.12 `show interfaces dcb priority-group`

Displays configuration and status of priority group feature on an interface or all interfaces.

    show interfaces [interface-type interface-id] dcb priority-group [detail]

Syntax Description | interface-type - Interface type. interface-id - Interface identifier. detail - Display the following configuration and status: Local configuration of PG, operational status of PG, and peer configuration of PG. Without the `detail` key word, this command displays the local PG configuration only.
Mode | Privileged EXEC
Example | SEFOS# show interfaces extreme-ethernet 0/18 dcb priority-group detail Port : Ex0/18 Show Type : Admin Config Feature : Priority Group Enable : true Advertise : false Willing : false Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 2 2 2 15 Max Traffic Class: 8 Show Type : Oper Config Feature : Priority Group Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : true Syncd with Peer : true Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 2 2 2 15 Max Traffic Class: 8 Show Type : Peer Config Feature : Priority Group Local Interface : Ex0/18 Status : successful Enable : true Willing : true Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 1 2 2 15 Max Traffic Class: 8 ------------------------------------------------------------ Total Entries Displayed : 1
| The operational and peer configurations will not be displayed if "detail" keyword is omitted as shown below. SEFOS# show interfaces extreme-ethernet 0/18 dcb priority-group Port : Ex0/18 Show Type : Admin Config Feature : Priority Group Enable : true Advertise : true Willing : false Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 1 2 2 15 Max Traffic Class: 8
| The peer configuration will not be shown if the interface is connected to a non-DCB capable peer as shown below. SEFOS# show interfaces extreme-ethernet 0/19 dcb priority-group detail Port : Ex0/19 Show Type : Admin Config Feature : Priority Group Enable : true Advertise : true Willing : false Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 2 2 2 15 Max Traffic Class: 8 Show Type : Oper Config Feature : Priority Group Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : false Syncd with Peer : false Group Bandwidth : 0% 0% 0% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 0 0 0 0 0 Max Traffic Class: 8

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configured the Application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-flow-control - Displays PFC parameters

### 16.1.13 `show interfaces dcb priority-flow-control`

Displays configuration and status of priority flow control feature on an interface or all interfaces.

    show interfaces [interface-type interface-id] dcb priority-flow-control [detail]

Syntax Description | interface-type - Interface type. interface-id - Interface identifier. detail - Display the following configuration and status: Local configuration of PFC, operational status of PFC, and peer configuration of PFC. Without the `detail` key word, this command displays the local PFC configuration only.
Mode | Privileged EXEC
Example | SEFOS# show interfaces extreme-ethernet 0/18 dcb priority-flow-control detail Port : Ex0/18 Show Type : Admin Config Feature : Priority Flow Control Enable : true Advertise : false Willing : false Priority Mask : 0 0 0 1 0 0 0 0 Max Traffic Class: 8 Show Type : Oper Config Feature : Priority Flow Control Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : true Syncd with Peer : true Priority Mask : 0 0 0 1 0 0 0 0 Max Traffic Class: 8 Show Type : Peer Config Feature : Priority Flow Control Local Interface : Ex0/18 Status : successful Enable : true Willing : true Priority Mask : 0 0 0 1 0 0 0 0 Max Traffic Class: 8 ------------------------------------------------------------ Total Entries Displayed : 1
| The operational and peer configurations will not be displayed if "detail" keyword is omitted as shown below. SEFOS# show interfaces extreme-ethernet 0/18 dcb priority-group Port : Ex0/18 Show Type : Admin Config Feature : Priority Group Enable : true Advertise : true Willing : false Group Bandwidth : 50% 30% 20% 0% 0% 0% 0% 0% Priority Group ID: 0 0 0 1 1 2 2 15 Max Traffic Class: 8
| The peer configuration will not be shown if the interface is connected to a non-DCB capable peer as shown below. SEFOS# show interfaces extreme-ethernet 0/19 dcb priority-flow-control detail Port : Ex0/19 Show Type : Admin Config Feature : Priority Flow Control Enable : true Advertise : true Willing : false Priority Mask : 0 0 0 1 0 0 0 0 Max Traffic Class: 8 Show Type : Oper Config Feature : Priority Flow Control Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : false Syncd with Peer : false Priority Mask : 0 0 0 0 0 0 0 0 Max Traffic Class: 8

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configures the Application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-group - Displays PG parameters

### 16.1.14 `show interfaces dcb application-etype-fcoe`

Displays configuration and status of priority flow control feature on an interface or all interfaces.

    show interfaces [interface-type interface-id] dcb application-etype-fcoe [detail]

Syntax Description | interface-type - Interface type. interface-id - Interface identifier. detail - Display the following configuration and status: Local configuration of application feature, and peer configuration of application feature. Without the `detail` key word, this command displays the local application configuration only.
Mode | Interface Configuration
Example | SEFOS# show interfaces extreme-ethernet 0/18 dcb application-etype-fcoe detail Port : Ex0/18 Show Type : Admin Config Feature : Application FCoE Enable : true Advertise : false Willing : false Priority Map : 0 0 0 1 0 0 0 0 Show Type : Oper Config Feature : Application FCoE Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : true Syncd with Peer : true Priority Map : 0 0 0 1 0 0 0 0 Show Type : Peer Config Feature : Application FCoE Local Interface : Ex0/18 Status : successful Enable : true Willing : true Priority Map : 0 0 0 1 0 0 0 0 ------------------------------------------------------------ Total Entries Displayed : 1
| The operational and peer configurations will not be displayed if "detail" keyword is omitted as shown below. SEFOS# show interfaces extreme-ethernet 0/18 dcb application-etype-fcoe Port : Ex0/18 Show Type : Admin Config Feature : Application FCoE Enable : true Advertise : true Willing : false Priority Map : 0 0 0 1 0 0 0 0
| The peer configuration will not be shown if the interface is connected to a non-DCB capable peer as shown below. SEFOS# show interfaces extreme-ethernet 0/19 dcb application-etype-fcoe detail Port : Ex0/19 Show Type : Admin Config Feature : Application FCoE Enable : true Advertise : true Willing : false Priority Map : 0 0 0 1 0 0 0 0 Show Type : Oper Config Feature : Application FCoE Oper Version : 0 Max Version : 0 Errors : 0x0 - none Operational Mode : false Syncd with Peer : false Priority Map : 0 0 0 0 0 0 0 0 Total Entries Displayed : 0
Notes | If application feature is enabled, its priority mapping will be taken from the PFC setting since both PFC priority sets and the application priority mapping must have the same priority set. The default priority mapping is 0x08 (priority 3 is enabled for priority flow control).

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configures the Application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-group - Displays PG parameters

### 16.1.15 `show interfaces dcb mode`

Displays the DCB state and feature mode on all interfaces or on a specific interface.

    show interfaces [interface-type interface-id] dcb mode

Syntax Description | interface-type - Interface type. interface-id - Interface identifier.
Mode | Privileged EXEC
Example | SEFOS# show interfaces extreme-ethernet 0/18 dcb mode Port : Ex0/18 Show Type : Admin State DCB Capable State : on Priority Group : auto Priority Flow Control : auto

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configures the Application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-group - Displays PG parameters

- show lldp - Displays the local current LLDP switch information

### 16.1.16 `show interfaces dcb counters`

Displays the DCB control and counters on all interfaces or on a specific interface.

    show interfaces [interface-type interface-id] dcb counters

Syntax Description | interface-type - Interface type. interface-id - Interface identifier.
Mode | Privileged EXEC
Example | SEFOS# show interfaces extreme-ethernet 0/18 dcb counters Port : Ex0/18 Show Type : Control and Feature Stats Control Info Stats : SeqNo : 1 AckNo : 1 Frames Out : 1 Frames In : 2 Priority Group : Frames Out : 1 Frames In : 2 Priority Flow Control: Frames Out : 1 Frames In : 2 Application Proto : Frames Out : 1 Frames In : 2
| If the interface is not yet connected to a DCB capable peer, no DCB packets will be received by the interface as shown below. SEFOS# show interfaces extreme-ethernet 0/19 dcb counters Port : Ex0/19 Show Type : Control and Feature Stats Control Info Stats : SeqNo : 1 AckNo : 0 Frames Out : 1 Frames In : 0 Priority Group : Frames Out : 1 Frames In : 0 Priority Flow Control: Frames Out : 1 Frames In : 0 Application Proto : Frames Out : 1 Frames In : 0
| If the interface is down, no DCB will be transmitted and received by the interface as shown below. SEFOS# show interfaces extreme-ethernet 0/20 dcb counters Port : Ex0/20 Show Type : Control and Feature Stats Status : Link Down

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configures the application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-group - Displays PG parameters

- show lldp local - Displays the local current LLDP switch information

### 16.1.17 `clear interfaces dcb counters`

Clears the DCB control and counters on all interfaces or on a specific interface.

    clear interfaces [interface-type interface-id] dcb counters

Syntax Description | interface-type - Interface type. interface-id - Interface identifier.
Mode | Privileged EXEC
Example | SEFOS# clear interfaces extreme-ethernet 0/18 dcb counters

#### Related Commands

- set dcb priority-group - Configures the PG parameters

- set dcb priority-flow-control vlan-priority - Configures the PFC parameters

- set dcb application-etype-fcoe - Configures the application parameters

- show dcb global info - Displays the DCB global information

- show interfaces dcb priority-group - Displays PG parameters

- show interfaces dcb counters - Displays DCB control information and counters

- show lldp local - Displays the local current LLDP switch information

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