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

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

MartinS
New Contributor III

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? 

1 ACCEPTED SOLUTION

FredrikB-NN2
Contributor

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)!

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2 REPLIES 2

FredrikB-NN2
Contributor

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)!

MartinS
New Contributor III

Thank you. 

GTM-P2G8KFN