VSS Quad Sup Question

[bradleyordner]

Hi, 

We have two chassis 4500's with Quad Sup's. They are currently in VSS mode with Secondary Sup in each Chassis in Rom mon. 

Our problem is contained to the chassis themselves, not the VSS.

When we do power failure test, the chassis reboots but the now rom mon mode supervisor powers up and becomes Primary. It does not have the configuration of the Primary Supervisor. 

So we need to know -

1. Does the config get synced, if not do you have to manually load config from primary sup if it fails. 

2. Can you force a specific supervisor in a chassis to be Primary. 

Thanks

[Leo Laohoo]

When we do power failure test, the chassis reboots but the now rom mon mode supervisor powers up and becomes Primary. It does not have the configuration of the Primary Supervisor. 

Without VSS, if a chassis has dual-supervisor card, the configuration of the primary card is always synchronized to the standby card.  Same goes with VSS (single- or dual supervisor card per chassis):  The configuration is synchronized to all "on-line" supervisor card. 

The only time this doesn't happen is when the standby card is either in ROMmon or couldn't join the "redundancy" (of a dual-supervisor card per chassis or VSS) due to incorrect IOS.

[bradleyordner]

Thanks for the reply. 

Does this mean that before going into ROM MON mode we need to make sure the configuration is the same manually, or when it boots do we have to manually add the config?

The VSS config guide says we need to leave the Standby in Rom Mon mode, so for failover it looks manual?

Is there a way to force say Blade 3 to always be primary, or is it whoever powers up first?

[Leo Laohoo]

Does this mean that before going into ROM MON mode we need to make sure the configuration is the same manually, or when it boots do we have to manually add the config?

The standby card must have NO CONFIGURATION.  Zero.  Not even a VLAN.dat file.  Once the standby links up with the primary the configuration will be synchronized between the two.  

The main thing you need to ensure is the IOS must be the same.  If the standby card is running a different IOS, the standby card will boot into ROMmon.