Why leases are not renewed always via dhcp-relay ?

LEMORDANT Philippe RD-CORE-LAN philippe.lemordant at orange-ftgroup.com
Fri Jul 6 15:24:27 UTC 2007


Check the giaddr value of the client request-renew. It might be set to In this case the server directly answers to the client and bypass the relay-agent.

-----Message d'origine-----
De : dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] De la part de Sébastien CRAMATTE
Envoyé : vendredi 6 juillet 2007 16:28
À : dhcp-users at isc.org
Objet : Why leases are not renewed always via dhcp-relay ?


I've got some problems with DHCP relay

I'm running  Arris CMTS C3 to manage cable modems. This one act as my dhcp relay agent.
My dhcp server assign private IP for modems and public to the CPE  (end user computer).

When I connect a new user  cable modem and cpe  obtain IPs via Dhcp Relay as expected

But when it's time to renew the lease, the server renew the IP directly bypassing the dhcp relay

It's very strange ?
I want to force to use  dhcp relay  in every case ... I need option 82 datas so when a lease is renewed directly I loose these datas Any ideas or configuration tips ?


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