IBM Nortel Networks L2/3 Manual page 100

Ensure that PVST is selected as Spanning Tree mode, enter:
conf t
spanning-tree mode pvst
Core1 should become the Root Bridge for VLAN 5 and 10 while being backup Root for VLAN
20 and 99:
spanning-tree vlan 1-10 root primary
spanning-tree vlan 11-4094 root secondary
end
Vice versa for Core2, so that it will be elected as Root Bridge for VLAN 20 and 99, backing up
the Root for VLAN 5 and 10:
spanning-tree vlan 1-10 root secondary
spanning-tree vlan 11-4094 root primary
end
Reenable the ports
After verifying the correct cabling between all the devices, the ports can be re-enabled.
Enabling the ports on GbESM_1 and GbESM_2
/oper/port EXT1/ena
/oper/port EXT2/ena
/oper/port EXT5/ena
/oper/port EXT6/ena
Enabling the ports on Core1 and Core2
conf t
int range g0/1-2, g0/11-12
no shut
Verify the Spanning Tree status
As shown in Example 7-11, the port status and the VLAN assignment could be verified by
entering info/link and info/port on the GbESM.
Example 7-11 Verifying port status and VLAN assignment
>> GbESM_1 - Configuration# /i/link
------------------------------------------------------------------
Alias
-----
INT1
INT2
INT3
INT4
INT5
INT6
INT7
INT8
INT9
INT10
INT11
INT12
INT13
INT14
MGT1
MGT2
EXT1
EXT2
Nortel Networks L2/3 Ethernet Switch Module for IBM Eserver BladeCenter
86
Port Speed Duplex
---- ----- -------- --TX-----RX--
1 1000 full
2 1000 full
3 1000 full
4 1000 full
5 1000 full
6 1000 full
7 1000 full
8 1000 full
9 1000 full
10 1000 full
11 1000 full
12 1000 full
13 1000 full
14 1000 full
15 100 full
16 100 full
17 1000 full
18 1000 full
Flow Ctrl Link
------
yes yes up
yes yes up
yes yes up
yes yes up
yes yes up
yes yes up
yes yes up
yes yes down
yes yes down
yes yes down
yes yes down
yes yes down
yes yes down
yes yes down
yes yes up
yes yes disabled
no no up
no no up