Arista EOS, SSO support starts from 4.20.5F

On Sand platform, 7500R/E series. And 4.20.5F was released around Arp 2018. (bl)

We have 2 commands to check if system is sso-ready:

• wait-for-warmup checks for any agent to be not ready
• show redundancy stat is to ensure sso stage participating agents to be warm

And better to run these 2 commands on both sup:

bn302.10:49:50#wait-for-warmup

bn302.10:51:11#show redundancy states

  my state = ACTIVE

peer state = STANDBY HOT

      Unit = Primary

   Unit ID = 1

Redundancy Protocol (Operational) = Stateful Switchover

Redundancy Protocol (Configured) = Stateful Switchover

Communications = Up

switchover completion timeout = 120.0 seconds (default)

Not ready for switchover (Agents not ready in standby supervisor)

Agents not ready =

   Sand

  Last switchover time = 10:00:13 ago

Last switchover reason = Supervisor has control of the active supervisor lock

bn302.10:51:16#sess peer-supervisor wait-for-warmup

bn302.10:51:29#sess peer-supervisor show redu stat

  my state = STANDBY HOT

peer state = ACTIVE

      Unit = Secondary

   Unit ID = 2

Redundancy Protocol (Operational) = Stateful Switchover

Redundancy Protocol (Configured) = Stateful Switchover

Communications = Up

switchover completion timeout = 120.0 seconds (default)

Not ready for switchover (Agents not ready in standby supervisor)

Agents not ready =

   Sand