Fibre Channel (SAN)

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Occasional Contributor
Posts: 17
Registered: ‎11-26-2013

Looking for an explanation of what a fabric reconfiguration

Looking for an explanation of a fabric reconfiguration and the events that happen during a reconfiguration

Thanks

Regular Contributor
Posts: 161
Registered: ‎12-30-2009

Re: Looking for an explanation of what a fabric reconfiguration

Are you just asking in general or specific?

If the latter please provide more info (logs) on the events that took place.

 

Occasional Contributor
Posts: 17
Registered: ‎11-26-2013

Re: Looking for an explanation of what a fabric reconfiguration

I am looking for a general explanation of the events that transpire during a fabric reconfiguration.

Frequent Contributor
Posts: 104
Registered: ‎07-27-2009

Re: Looking for an explanation of what a fabric reconfiguration

Basically there are two "Fabric Reconfigurations":

 

1. BF - Build Fabric which is non-disruptive

2. RCF - Reconfigure Fabric  whihc is disruptive.

 

An RCF is only used if a discrepancy is observed in the fabric structure such as multiple principle switches in the same fabric or incorrectly used domain-id's where usual segmentation doesn't seem to occur. In this case all FC sequences are terminated, all domain-id lists are cleared and a new configuration is build via the normal EFP process. A principle switch selection occurs and the usual domain id distribution happens.

 

A BF does the same exept it does not terminate inflight sequences or class-1 connections. If you add a new switch then normally this BF is what happens.

Occasional Contributor
Posts: 17
Registered: ‎11-26-2013

Re: Looking for an explanation of what a fabric reconfiguration

If there are multiple switches in your fabric and you need to retire a switch that is currently serving as the principal switch, what would happen when that switch is removed?  Does it go thru a RCF when a new principal is elected from the remaining switches?

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