topic Re: Does it matter what order the IP helpers are added in on EXOS? in ExtremeSwitching (EXOS/Switch Engine)

Does it matter what order the IP helpers are added in on EXOS?

MartinS — Tue, 14 Feb 2023 12:01:47 GMT

If I have multiple IP helpers on an Extreme EXOS switch, does it matter what order the IP helpers are added in, or does EXOS send the request, one-by-one, to ALL the IP helper servers configured one-by-one?

Re: Does it matter what order the IP helpers are added in on EXOS?

FredrikB-NN2 — Tue, 14 Feb 2023 13:40:51 GMT

All helpers will get a copy each, so the order doesn't matter. The client will receive multiple replies, even multiplied again if you have two routers with VRRP etc. It is common to see four DHCPOFFERs for each DHCPDISCOVER. The client will choose one (often the first) reply to use in it's DHCPREQUEST. The rest is, as we say, unicast (not history)!

Re: Does it matter what order the IP helpers are added in on EXOS?

MartinS — Tue, 14 Feb 2023 14:31:06 GMT

Thank you.