04-02-2009 10:21 AM - edited 03-06-2019 04:58 AM
Hello Guys,
I need suggestions from you all on attached proposed setup.
Actually I have three switches in network(Switch A,B,C). Switch A is the parent(main) switch from where two switches(B & C) connected for access node.
I am looking for solution where in case of failure of main uplinks i.e link between Switch A to B or between Switch A to C , L2 traffic of isolated switch diverted on direct path between Switch B & Switch C and then to uplink towards main switch A.
04-02-2009 10:41 AM
If you have spanning tree running , it should automatically take care of that situation assumeing all the vlans on b and c are allowed on the trunk between b and c. Make sure the root of all vlans are on switch "A" .
04-02-2009 06:35 PM
As Glen said, spanning-tree will take care of the redundancy for you. Make sure you set switch A as your root bridge for all vlans.
Also, if you can, try to run Rapid Spanning-tree instead of the old 802.1d. Your failover will be lightning fast as compared to 802.1d.
Single step on EACH switch:
# spanning-tree mode rapid-pvst
Do "show spanning-tree vlan 1" (or whichever vlan) and this will tell you which ports are blocked for the specific vlan.
04-03-2009 12:36 AM
@ Glen,
You mean excute below command of Switch "A"
spanning-tree vlan 1,2,3,4,5,6,7 root
One more thing....PVST is running on all switches.
Regards
Jimmy.
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