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08-11-2017 02:57 PM
08-11-2017 02:57 PM
IRF stacked switches and BAG
Hello!
let me explain the setup scenario:
I am building a new cluster with several nodes. Each with 4 x 10GBit interfaces. For HA reasons, 2 of the interfaces should point to swich A and the other 2 to switch B.
Switch A and B is a IRF stacked pair..
IRF is LACP aware but my question is how to connect the nodes:
- create one BAG with 4 x 10,GBit, 2 of them pointing to swich A and 2 of them to switch B
- create 2 BAGs, first of the BAG to switch A and the second BAG to switch B
In the past, I used the second method but I am not sure if this is the best setup.
Thans for any suggestions
Regards
Juergen Northe
Thanks for any advice
Regards Juergen
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08-12-2017 05:01 AM - edited 08-12-2017 06:24 AM
08-12-2017 05:01 AM - edited 08-12-2017 06:24 AM
Re: IRF stacked switches and BAG
So if you have, at core, a two members IRF Stack (you're calling IRF members 1 and 2 as Switch A and B, that's OK) and various edge Switches equipped with 4 x 10G interfaces...go with your first idea: create one LACP BAG with 4 x 10G members interfaces (this on relevant edge Switch(es) and on the IRF Stack too) and conveniently distribute 2 physical BAG member links to IRF Member 1 and remaining other 2 physical BAG member links to IRF Member 2.
Doing so you will have a single 4 x 10G BAG connected to the IRF Stack which, from the point of view of edge Switch(es), is seen as a single L2/L3 virtual Switch...clearly you should pay attention to throughput between IRF Members - IRF Port(s) - too (I assume you're interconnecting them accordingly): consider to enable, at system level, the lacp traffic-redirect-notification option on the IRF Stack *and* to keep enabled by default the long LACP timeout interval too.
In other words, avoid to create two separate BAGs on the same edge Switch, connecting the first BAG to IRF Member 1 and the second to IRF Member 2.
I'm not an HPE Employee
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08-18-2017 12:06 AM
08-18-2017 12:06 AM
Re: IRF stacked switches and BAG
Hi Parnassus,
thank you very much for your support and usefull hints!
Regards
Juergen