topic RE: MLAG configuration for stacks in Network Architecture & Design

MLAG configuration for stacks

Gabriel3 — Tue, 12 Jan 2016 19:51:00 GMT

Hello,

I have two stacks, and i would like to build a MLAG pair
Each stack is composed of a Summit X670V (slot 1) and a X670 (slot 2)
To make the ISC link, i want to use a sharing of two links, and i was wondering if there is any recommandation about what ports to use for this link ?
Can i use 2 ports on the X670V switchs for the first link, and 2 ports on the X670 switchs for the second link ?
This would look like that :

If this is not possible and i have to connect the two links on the same switchs (for example Slot 1 <=> Slot 1), i could have the situation where one of these switchs fails (let's say for example Slot 1 on the left has a power outage), so the MLAG is broken (split brain) but i still have dual-attached devices (servers, routers) that are dual-attached to the two "Slot 2" switchs and then continue to think the MLAG is up

Thanks in advance for tour advice
Gabriel

RE: MLAG configuration for stacks

Kevin_Eaton1 — Tue, 12 Jan 2016 20:03:00 GMT

Hi Gabriel,

Yes this is entirely possible, just create a sharing group on each stack with members in either switch, for example:

On switch 1: enable sharing 1:1 grouping 1:1, 2:1 algorithm address-based l3_l4
on switch 2: enable sharing 1:1 grouping 1:1, 2:1 algorithm address-based l3_l4

Then connect ports 1:1 on each stack and 2:1 on each stack.

Cheers

Kevin

RE: MLAG configuration for stacks

Ryan_Mathews — Tue, 12 Jan 2016 20:03:00 GMT

Thanks for joining the Hub Kevin. Great to have you.

Already helping the community. Impressive!

RE: MLAG configuration for stacks

Gabriel3 — Tue, 12 Jan 2016 20:18:00 GMT

Hi Kevin,

Thanks for the information

Best regards
Gabriel