Cisco C350 does not clear ARP when failover occurs

[cisco_eng_1]

Hello,

Topology:

LAN -- >Switch_1 -- > FW_1 -- > C350_1 --> Velo Cloud_1 --> WAN

LAN -- >Switch_2 -- > FW_2 -- > C350_2--> Velo Cloud_1 --> WAN

We have a pair of C350's with a clustered pair of A/A Velo cloud devices configured on the north facing side and a clustered pair of A/P firewalls on the south facing side. 

The issue we are facing is that when either of the clusters fail over, the c350's maintain the old mac until a manual intervention takes place (e.g., reboot C350). We do not see the same behaviour with our C1000 switches in identical configuration.

Has anyone come across this issue?

Thanks

Cisco_guy

[Reza Sharifi]

Hi,

Not familiar with the C350 series, but if they are stacked, can you check and see if this command is configured?

stack-mac persistent timer 0

HTH

[Georg Pauwen · Accepted solution]

Hello,

tough one...as far as I recall, the 350 switches have only a limited set of commands available. I think you can change the mac-address table aging time to something like 10 seconds, that would cause the entries to age out within that amount of time.