Hey Parnassus,
maybe you can help me out with the split recovery mode. I saw it's enabled by default but I'm not sure how it works.
From the release notes:
Split recovery mode has been added. Split-recovery mode prevents traffic loss when the ISL goes out-of-sync and keepalive subsequently fails. When the ISL goes out-of-sync and keepalive is established, the secondary VSX lags will be brought down. If keepalive also fails, this causes a split condition. In this case, if split recovery mode is enabled, the secondary will continue to keep its VSX lags down. Split recovery mode is enabled by default
If I have a pair of 8400s and the primary hangs for some reason, ISL will go out of sync and VSX keepalives will stop being sent.
With split recovery enabled (default), the secondary will just shutdown all it's multichassis LAG interfaces? Is this right or am I missing something?
If that's the case, a simple reboot/upgrade of the primary 8400 will cause a service disruption, wouldn't it?
I'm considering upgrading and I want to fully understand how this works and I couldn't find anything on the documenation.
Best regards