cancel
Showing results for 
Search instead for 
Did you mean: 

What is Port-cpp in fdb tables?

What is Port-cpp in fdb tables?

dgsong
New Contributor

Hi everyone. Sometimes when I look at fdb tables when I can't communicate, it looks like Port-cpp, but after some time it changes to normal interface.

스크린샷 2024-05-07 120518.png

what is Port-cpp in fdb tables?

1 ACCEPTED SOLUTION

Just speculating here but it almost sounds like you have a loop or a misconfigured LAG (SMLT in your case).  Is the downstream switch configured properly via it's LAG using LACP (or static alternative) to your v-IST cluster?

View solution in original post

5 REPLIES 5

The failed mac is the mac on the Cisco switch.
The downstream switch is ERS3626GTS and is set to mlt, but the Cisco switch that has failed is connected to ERS.
No Loop failures occurred at that time.
Topology is VSP SW(Core) - ERS SW(Distribute) - Cisco SW(Access).
VSP switches are gateways for ERS switches and Cisco switches.
Multiple Cisco switches are connected to an ERS switch, but only one has been changed from a VSP switch to Port-cpp, making it impossible to communicate.
So I wondered what Port-cpp meant.
Thanks.

GTM-P2G8KFN