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тАО09-03-2010 04:48 PM
тАО09-03-2010 04:48 PM
I have 2 6600 switches that I'd like to configure so that it has both L2 & L3 redundancy. I.e. if 1 switch fails, the other switch will continue to route network and SAN traffic. Is VRRP the best/only option for this?
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тАО09-03-2010 05:41 PM
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тАО09-08-2010 10:41 AM
тАО09-08-2010 10:41 AM
Re: 6600 layer 3 redundancy
Since you specifically mention SAN traffic :
keep in mind that a failover of your L3 functionality is (obviously) significantly slower then L2 failovers.
Depending on the sensitivity to a 'network silence' during such a failover, all SAN-connected hosts might have died during the VRRP-failover, since it will feel to them as if you hot-plugged the harddrive.
I can't think of anything to prevent that from happening, so in some environments it is 'relatively useless' to have this VRRP-failover.
You might want to look into Distributed Trunking (havent used it on 6600s; I think they will support it) but there are a lot of features that are 'mutualy exclusive' with Distributed Trunking.
keep in mind that a failover of your L3 functionality is (obviously) significantly slower then L2 failovers.
Depending on the sensitivity to a 'network silence' during such a failover, all SAN-connected hosts might have died during the VRRP-failover, since it will feel to them as if you hot-plugged the harddrive.
I can't think of anything to prevent that from happening, so in some environments it is 'relatively useless' to have this VRRP-failover.
You might want to look into Distributed Trunking (havent used it on 6600s; I think they will support it) but there are a lot of features that are 'mutualy exclusive' with Distributed Trunking.
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тАО09-08-2010 02:09 PM
тАО09-08-2010 02:09 PM
Re: 6600 layer 3 redundancy
Thank you all for the responses, I'll give both VRRP and distributed trunking a try
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