Skip Navigation Links
Exit Print View
| Sun Ethernet Fabric Operating System ### PVRST+ Administration Guide

Search Scope:

- This Document
- Entire Library

## Enable IPv6 Support and Assign IPv6 Addresses

Before you execute the following instructions, ensure that all of the switches are in their default configuration. Also, disable GVRP, and start and enable PVRST+ on all switches. In the default configuration, vlan 1 is the default VLAN. If you plan to use another VLAN ID as the default VLAN, you must configure and enable the VLAN ID.

In the following examples, ports are configured as trunk, and vlan 10 is enabled on all three switches. vlan 10 is also used to show spanning tree status on switch C. See VLAN Module for information about configuring the VLAN module.

After the topology stabilizes, switch A is elected as the root because it has the lowest MAC address. All ports on all switches, except port 57 on switch C, should be in forwarding state. Port 57 on switch C should be detected as an alternate port in the discarding state.

Complete the following task on all three switches before setting the priority on switch C for the STP. Note that the following examples are run on switch C and similar commands must be run on switches A and B as well.

1. Enter the configuration mode.

       TOR-2 SEFOS# configure terminal
       TOR-2 SEFOS(config)#

2. Disable the GVRP module.

       TOR-2 SEFOS(config)# set gvrp disable
       TOR-2 SEFOS(config)#

3. Enable `VLAN 10`.

       TOR-2 SEFOS(config)# vlan 10
       TOR-2 SEFOS(config-vlan)# vlan active
       TOR-2 SEFOS(config-vlan)# exit
       TOR-2 SEFOS(config)#

4. Configure and bring up port 1 and port 57 as trunk.

       TOR-2 SEFOS(config)# interface extreme-ethernet 0/1
       TOR-2 SEFOS(config-if)# switchport mode trunk
       TOR-2 SEFOS(config-if)# no shutdown
       TOR-2 SEFOS(config-if)# exit
       TOR-2 SEFOS(config)#
       TOR-2 SEFOS(config)# interface extreme-ethernet 0/57
       TOR-2 SEFOS(config-if)# switchport mode trunk
       TOR-2 SEFOS(config-if)# no shutdown
       TOR-2 SEFOS(config-if)# exit
       TOR-2 SEFOS(config)#

5. Configure IP address and mask for `VLAN 10`.

       TOR-2 SEFOS(config)# interface vlan 10
       TOR-2 SEFOS(config-if)# shutdown
       TOR-2 SEFOS(config-if)# ip address 192.168.10.149 255.255.255.0
       TOR-2 SEFOS(config-if)# no shutdown
       TOR-2 SEFOS(config-if)# end
       TOR-2 SEFOS#

6. Repeat Steps 1 - 5 on switches A and B with their own port numbers, IP addresses, and masks.
7. After all three switches are properly configured and the spanning tree topology is stabilized, display the spanning tree information for VLAN 10 on switch C.

   Port 57 should be in discarding state.

       TOR-2 SEFOS# show spanning-tree vlan 10

       -----------------------------------------------------------------

       Spanning-tree for VLAN 10
       Root Id         Priority   32778
                       Address    00:14:4f:6c:56:6f
                       Cost       2000
                       Port       Ex0/1
                       Hello Time 2 Sec, Max Age 20 Sec, Forward Delay 15 Sec

       Spanning Tree Enabled Protocol PVRST
       Bridge Id       Priority 32778
                       Address 00:14:4f:6c:6e:0d
                       Hello Time 2 sec, Max Age 20 sec, Forward Delay 15 sec
       Name     Role         State        Cost     Prio   Type
       ----     ----         -----        ----     ----   ------
       Ex0/1    Root         Forwarding   2000     128    P2P
       Ex0/57   Alternate    Discarding   2000     128    P2P

       TOR-2 SEFOS#

8. Ping the `VLAN 10` IP address of switch A or B from C.

       TOR-2 SEFOS# ping 192.168.10.199
       Reply Received From :192.168.10.199, TimeTaken : 160 msecs
       Reply Received From :192.168.10.199, TimeTaken : 110 msecs
       Reply Received From :192.168.10.199, TimeTaken : 90 msecs

       --- 192.168.10.199 Ping Statistics ---
       3 Packets Transmitted, 3 Packets Received, 0% Packets Loss
       TOR-2 SEFOS#

       TOR-2 SEFOS# ping 192.168.10.144
       Reply Received From :192.168.10.144, TimeTaken : 100 msecs
       Reply Received From :192.168.10.144, TimeTaken : 100 msecs
       Reply Received From :192.168.10.144, TimeTaken : 110 msecs

       --- 192.168.10.144 Ping Statistics ---
       3 Packets Transmitted, 3 Packets Received, 0% Packets Loss
       TOR-2 SEFOS#

9. To display the effect of the bridge priority on the port spanning tree state, in switch C, set the priority for the STP.

       TOR-2 SEFOS# configure terminal
       TOR-2 SEFOS(config)# spanning-tree vlan 10 brg-priority 4096
       TOR-2 SEFOS(config)# end
       TOR-2 SEFOS#

   In the PVRST+ software, the spanning-tree parameters apply only to the specified VLAN.

   For `brg-priority`, you can provide a value from 0 to 61440 in increments of 4096. The priority you provide is combined with the VLAN ID to obtain the actual priority for the instance created for the VLAN. If you do not specify a value, the VLAN ID is combined with a default value of 32768. If the combined number is lower than the other switches, the more likely it is that the switch will be chosen as the root switch.

   Valid priority values are: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, and 61440.

   Note - After you configure the bridge priority, you should confirm that switch C has been detected as the root and that port 1 of switch B is the alternate port.

10. In switch A, review the spanning-tree information.

        NEM-1 SEFOS# show spanning-tree vlan 10

        -------------------------------------------------------------------
        Spanning-tree for VLAN 10
        Root Id         Priority   4106
                        Address    00:14:4f:6c:6e:0d
                        Cost       2000
                        Port       Ex0/7
                        Hello Time 2 Sec, Max Age 20 Sec, Forward Delay 15 Sec

        Spanning Tree Enabled Protocol PVRST
        Bridge Id       Priority 32778
                        Address 00:14:4f:6c:56:6f
                        Hello Time 2 sec, Max Age 20 sec, Forward Delay 15 sec
        Name     Role         State        Cost     Prio   Type
        ----     ----         -----        ----     ----   ------
        Ex0/3    Designated   Forwarding   2000     128    P2P
        Ex0/7    Root         Forwarding   2000     128    P2P
        Ex0/20   Designated   Forwarding   2000     128    P2P
        NEM-1 SEFOS#

11. In switch B, review the spanning-tree information.

        TOR-1 SEFOS# show spanning-tree vlan 10

        -------------------------------------------------------------------
        Spanning-tree for VLAN 10
        Root Id         Priority   4106
                        Address    00:14:4f:6c:6e:0d
                        Cost       2000
                        Port       Ex0/57
                        Hello Time 2 Sec, Max Age 20 Sec, Forward Delay 15 Sec

        Spanning Tree Enabled Protocol PVRST
        Bridge Id       Priority 32778
                        Address 00:14:4f:6c:69:ed
                        Hello Time 2 sec, Max Age 20 sec, Forward Delay 15 sec
        Name     Role         State        Cost     Prio   Type
        ----     ----         -----        ----     ----   ------
        Ex0/1    Alternate    Discarding   2000     128    P2P
        Ex0/57   Root         Forwarding   2000     128    P2P

        TOR-1 SEFOS#

12. In switch C, review the spanning-tree information.

        TOR-2 SEFOS# show spanning-tree vlan 10

        -------------------------------------------------------------------
        Spanning-tree for VLAN 10

        We are the root of the Spanning Tree
        Root Id         Priority   4106
                        Address    00:14:4f:6c:6e:0d
                        Cost       0
                        Port       0
                        Hello Time 2 Sec, Max Age 20 Sec, Forward Delay 15 Sec
        Spanning Tree Enabled Protocol PVRST
        Bridge Id       Priority 4106
                        Address 00:14:4f:6c:6e:0d
                        Hello Time 2 sec, Max Age 20 sec, Forward Delay 15 sec
        Name     Role         State        Cost     Prio   Type
        ----     ----         -----        ----     ----   ------
        Ex0/1    Designated   Forwarding   2000     128    P2P
        Ex0/57   Designated   Forwarding   2000     128    P2P

        TOR-2 SEFOS#

13. In switch C, reset the priority to the default value. Switch A should be reelected as root again.

        TOR-2 SEFOS# configure terminal
        TOR-2 SEFOS(config)# no spanning-tree vlan 10 brg-priority
        TOR-2 SEFOS(config)# end
        TOR-2 SEFOS#

14. In switch A, review the spanning-tree information (it shows switch A is a root again).

        NEM-1 SEFOS# show spanning-tree vlan 10

        -------------------------------------------------------------------
        Spanning-tree for VLAN 10
        We are the root of the Spanning Tree

        Root Id         Priority   32778
                        Address    00:14:4f:6c:56:6f
                        Cost       0
                        Port       0
                        Hello Time 2 Sec, Max Age 20 Sec, Forward Delay 15 Sec

        Spanning Tree Enabled Protocol PVRST
        Bridge Id       Priority 32778
                        Address 00:14:4f:6c:56:6f
                        Hello Time 2 sec, Max Age 20 sec, Forward Delay 15 sec
        Name     Role         State        Cost     Prio   Type
        ----     ----         -----        ----     ----   ------
        Ex0/3    Designated   Forwarding   2000     128    P2P
        Ex0/7    Designated   Forwarding   2000     128    P2P
        Ex0/20   Designated   Forwarding   2000     128    P2P

        NEM-1 SEFOS#

Copyright © 2010, 2012, Oracle and/or its affiliates. All rights reserved. Legal Notices |