DHCP Relay agent not forwarding messages to the client

[Doug Barton]

On 6/16/15 12:42 PM, dave c wrote:
> Referencing the RFCs that were posted earlier... what we are seeing here
> is how it's supposed to work. When the dhcp relay system doesn't opt to
> choose which server to relay requests to.

I think there is some confusion in this thread. If you're running 
failover it's correct that the IP helpers on the network gear need to 
send all of the DHCP packets to both servers.

Both servers will see the majority of the traffic, but what should be 
true is that only *one* server will actually send the DHCPACK. You 
should be able to see that in the logs, and verify it in the leases file 
on both servers.

If you are seeing a situation where both servers are handing out ACKs 
then it's almost certain that they are not operating in "normal" state.

hope this helps,

Doug

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