As everyone says VSS with SSO with Quad SUP is not supported in CAT4500, but at the same time it is also mentioned that in case of failure of ICA, we have to boot the ICS manually from ROMMON mode.But it not mentioned anywhere how that SUP wil participate in VSS or rather how it will get synced with VSS active SUP at that time.
You may have a look here. I spent many hours testing this. This will walk you through the installation and help you with some of the pitfalls of this deployment. Just ensure you understand the limitations before diving in.
Document which you provided is very helpful on front of configuring VSS with Quad SUP in CAT4500. but it does not describe fail-over scenarios. As mentioned in the document we will have connectivity VSL between Active SUP in both the chassis and similarly standby SUP in both the chassis. But in this case following points are not clear...
what will happen when one of the in-chassis active sup fails & we make in-chassis standby SUP up?
What will be status of that SUP in VSS?
This questions are still unanswered.... So please help me to understand the fail-over scenarios of VSS.
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