We’ve got an issue where a switch is giving a vlan666 to the output of cdp in VMware and it doesn’t exist. Any ideas how this can be resolved ?

We have some 9300s that us an old IP and helper on vLAN1 - previously the network team created vLAN80 and assigned a management IP here too so they didn't need to clean up the old one, so we have 2 MGMT IPs.We want to remove the old IP from VLAN1 - r...

I have just got some brand new C9300s, I have them ready and have stacked their cables per the required for using 3 but the master switch still wont see the others, did I miss something ?I tried booting each switch in order too.M

Hi there,We are trying to get some endpoint redundancy in place and have the following switch's.Room 1 - Catalyst 9300 x4 <- Brand NewRoom 2 - Catalyst 2960-X x4 <- EOL 2027Is it possible to create 2x 4 Stacks and then setup active/active between the...