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10-07-2009 02:59 PM
10-07-2009 02:59 PM
Link Aggregation across cluster switches
I want to have a host Ethernet connect to different switches for redundancy.
This message was edited by rvincenty on 10-8-09 @ 1:10 PM
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10-08-2009 10:43 AM
10-08-2009 10:43 AM
Re: Link Aggregation across cluster switches
No. The 4500G stacks or clusters don't supports distributed link-aggregation. A few weeks ago I faced the same problem when implementing 4500G stacks. I've tried to setup MSTP, it works well initially; but when one of the links is disconnected and then reconnected the stack doesn't converge, it lost connectivity and just after 30~40 seconds it came up again.
You can use link-aggregation connected straight to the master switch; this was the better way I found to provide resilience and stability to the stack.
Regards
Fred Mancen
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10-08-2009 01:09 PM
10-08-2009 01:09 PM
Re: Link Aggregation across cluster switches
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10-15-2009 01:56 PM
10-15-2009 01:56 PM
Re: Link Aggregation across cluster switches
Regards.
This message was edited by Fred_Mancen on 10-15-09 @ 1:56 PM
Fred Mancen
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10-15-2009 05:30 PM
10-15-2009 05:30 PM
Re: Link Aggregation across cluster switches
Since we are talking about servers, alternatively, you could bridge your two network cards(if we are talking Windows).
I believe gnu/Linux's bonding feature has an operational mode setting that wont rely on LACP and that is specifically used when there is no support from a switch. (its called balance-alb).
I can not predict what would happen if you used that mode on your stack.
Either way, it wouldnt be seen by the stack as single logical unit. =-z
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04-14-2011 02:59 PM
04-14-2011 02:59 PM
Re: Link Aggregation across cluster switches
Can you tell me if the A5120's or A5500's support Distributed Link Aggregation? I'm having a devil of a time finding clear specifications on them. My thoughts are to connect the switches via an IRF/XRN link and use distributed link aggregation to connect to my ISCSI storage array.
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05-08-2011 10:58 AM - edited 05-08-2011 10:59 AM
05-08-2011 10:58 AM - edited 05-08-2011 10:59 AM
Re: Link Aggregation across cluster switches
Yes, both A5120 and A5500 supports DLA.
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