Should Both Servers in a Failover Pair Log All DHCPDISCOVERs?

sthaug at sthaug at
Tue Aug 18 19:36:05 UTC 2009

> We are suspecting that our failover pair may be out of sync on
> one of our wireless networks. Should both servers always log the
> DHCPDISCOVER packet from the same host even though only one will
> offer or has offered a lease?

Yes, *if* the DHCP relay agent transmits the DISCOVER to both servers!
I.e. this depends on the relay agent *and* the network between relay
agent and the servers.

Steinar Haug, Nethelp consulting, sthaug at

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