Insert delay in dhcp3-relay ?
dhcp1 at thehobsons.co.uk
Wed May 4 06:53:43 UTC 2011
>I would like to know if it's possible to add a delay before
>forwarding the query in the dhcp relay ? Because my client use the
>relay in place of my primary DHCP server ... so if I can add a delay
>my client will use my primary server.
Can you clarify your setup, and what the actual problem is ?
Clients do not "choose" a relay or server, they simply broadcast
requests and *ALL* relays and servers will receive it. Some may
choose to ignore it for some reason, but all will receive it.
So if you have two relay agents serving a network, or a relay agent
in the same network as the server, then the server(s) will receive
more than one copy of a broadcast request. That is normal.
Once a client has an active lease then it will periodically attempt
to renew it. These renewals, while the lease is still active, are
initially made by unicast to the server that issued the lease - and
relay agents don't get involved, neither do other DHCP servers. If
the issuing server doesn't respond, the client will eventually fall
back to broadcasting a renewal request and other relay agents &
servers then get involved.
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