topic How the E2122 HA works when one unit fail ? in ExtremeCloud IQ Controller

How the E2122 HA works when one unit fail ?

AndréP — Fri, 06 May 2022 15:51:20 GMT

Does a pair of E2122 continue to support 32000 sessions if one of the two devices stops working (breaks down) ?

Re: How the E2122 HA works when one unit fail ?

Paulo_Francisco — Mon, 09 May 2022 04:51:21 GMT

Hi Andre,
Yes. In an High Availability setup, while AP balancing may be distributed based on HA mode (Active-Active, Active-Passive, Site-Assigned) each controller is engineered to be resilient to the whole capacity of the pair. I.e In the case of Failover event (Controller shutdown/upgrade for example), the peer controller will support the entire capacity of the pair. In the case of a pair of E2122, the 'surviving' member would indeed support up to 4000 APs and 32,000 end-user sessions.

Re: How the E2122 HA works when one unit fail ?

Jayden69 — Tue, 18 Oct 2022 06:33:09 GMT

I appreciate the information and advice you have shared. I will try to figure it out for more.
DMVNow

Re: How the E2122 HA works when one unit fail ?

Paulo_Francisco — Thu, 01 Dec 2022 03:33:35 GMT

Yes. Each controller is engineered to be able to withstand the full capacity of the High-availability pair (APs and end-user sessions) in a Failover event situation.