Solved: Switching loop in Stack switch

anoop_mohan · ‎06-01-2009

Hi,

I have two 3560 switch which needs to be configure as a stack. will it form a swithing loop if i uplink each of those switches to a single core switch.if yes how to avoid it ?

andrew.prince · ‎06-01-2009

Anoop,

Yes you would, it's the same as if you just connected 1 switch to 2 seperate core switches, this also would create a switch loop.

HTH>

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andrew.prince · ‎06-01-2009

if you interlink the two 3560's via the stack cable - then become 1 logical switch, even though they are 2 physicals switches.

You can have multiple uplinks to your core switches, STP will recognise the switch stack as 1 logical switch - there will be no switching loop.

HTH>

anoop_mohan · ‎06-01-2009

Hi andrew,

Thank you very much for your response to my query.Could you also confirm if we need to run STP in switch stack as well?

thanks

Anoop M

andrew.prince · ‎06-01-2009

Anoop,

Yes you would, it's the same as if you just connected 1 switch to 2 seperate core switches, this also would create a switch loop.

HTH>

anoop_mohan · ‎06-01-2009

thanks

andrew.prince · ‎06-01-2009

np - glad to help