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What is Port-cpp in fdb tables?

What is Port-cpp in fdb tables?

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dgsong
New Contributor

‎05-06-2024 08:05 PM - edited ‎05-09-2024 02:32 AM

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?

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Configterminal
Contributor
In response to dgsong

‎05-09-2024 05:26 AM

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?

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dgsong
New Contributor
In response to Configterminal

‎05-12-2024 06:24 PM - edited ‎05-12-2024 06:25 PM

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.

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