Physical redundancy (CSS connected on two different switches)

[claeysg]

Hello,

Is it possible for redundancy reasons to connect a CSS to two different switches (like we do for access switches) ?

I know that one option is to configure both interfaces in the same vlan and use the spanning-tree for the redundancy. However, this will not be transparent for the end-user due to the slow convergence of the spanning-tree (uplinkfast or rapid-pvst is probably not supported).

Are there any other options ? One interface active, the other backup ?

Thanks in advance for your reply.

Gaetan

[Gilles Dufour · Accepted solution]

Gaetan,

for the CSS we suggest to be connected to only 1 switch and if the CSS detect a failure with the switch, force failover to the redundant css.

If you have ASR configured, failover will be stateful.

Gilles.