I have a Catalyst 3750 switch configured in a network. I would like an additional 3750 switch as a "hot" standby.
A 2nd 3750 switch was purchased, and the same configuration was entered in to the new switch, so I have 2 switches with the exact same configuration.
When I move the connections to the new switch, I have a few VLANs that do not come up. One VLAN does come up and work normally.
The VLANs in question show down, protocol down, and a show ip route reveals routes to the networks on these VLANs are not there
When I put everything back on the original switch, everything works normally.
Why would the new switch not work with the exact same configuration?