topic Question about port channel in General Topics

Question about port channel

RemoteUser — Mon, 23 Mar 2026 17:27:25 GMT

Hi Mates,
Hope you all doing well,

Does a failover occur if only one interface within the port channel is deactivated, or do all interfaces in the port channel need to be deactivated for the failover to take place?

Thanks

Re: Question about port channel

Bob_Zimmerman — Mon, 23 Mar 2026 17:47:31 GMT

That's controlled with 'set bonding group # min-links #' in clish. When fewer than that many members are up, the bond as a whole is marked down. For example, if you have a bond with four links, and you set it to 2, two of the members can be down without affecting the bond, but if a third member goes down, the whole bond goes down.

Re: Question about port channel

RemoteUser — Mon, 23 Mar 2026 20:47:14 GMT

Hi Bob,

Just to clarify my understanding:

In an HA deployment, if one interface within a bond on FW1 goes down, would this trigger a failover, or would the cluster remain active as long as the bond itself is still up?

In my scenario, I’m considering having redundancy across the links (cross + direct connections), effectively treating them as part of the same logical connectivity rather than separate bonds.

Please see the example below.

Re: Question about port channel

Bob_Zimmerman — Mon, 23 Mar 2026 20:52:17 GMT

By default, the bond only goes down if all of the member interfaces are down. If you want the bond to go down when any member interface is down, set the bond's min-links accordingly.