Spanning tree converge

ezsurf0902 · ‎06-22-2008

Hi,

I am planning to connect a edge switch direct to our core switch.

What I have currently is a â€œprimary coreâ€ and â€œsecondary coreâ€ etherchannel together and both are configure with lower bridge priority (24577).

My question are:

1. If I have to connect the edge switch with default priority to the â€œprimary coreâ€, will it cause the network to converge?

2. what if I connect the same edge switch to both â€œprimary coreâ€ and â€œsecondary coreâ€, will it cause the network to converge as the edge switch is configure with default priority?

Thanks in advance.

ohassairi · ‎06-22-2008

of course it will converge . why do you think STP will not converge?

lee.reade · ‎06-23-2008

Hi,

Since you have configured your core with a primary and secondary, when you plug in the new edge switch, the new switch will converge, in that it will accept the core switche as the stp root, it will not cause any outages or downtime, so dont worry bout that!

You mention that you have priority 24577 on primary and secondary, you should really have the primary on a lower priority than secondary, will secondary lower than default.

Finally, if you connect the new edge switch not both primary and secondary, highly recommended, then STP will simply block the link to the secondary switch, and use the link to primary switch.

Hope this helps.

Cheers,

LR