option82 "agent.remote-id " is missed in some lease ... Why ?
s.cramatte at wanadoo.fr
Wed Oct 25 14:56:27 UTC 2006
Thanks for this very clear answer ...
If I understand all I must set
If I reset all modems does the CPE lease will be renew from relay ?
I need to this one time because more than a half connected modems don't have the "agent.remote-id" data
Glenn Satchell a écrit :
>> Date: Wed, 25 Oct 2006 11:21:54 +0200
>> From: Sébastien CRAMATTE <s.cramatte at wanadoo.fr>
>> To: dhcp-users at isc.org
>> Subject: option82 "agent.remote-id " is missed in some lease ... Why ?
>> I've setup cable modem + arris c3 cmts with dhcp 3.0.4
>> My cmts act as a dhcp relay and add option82 to each CPE leases ...
>> It's very strange because some lease have "agent.remote-id " line (the
>> modem mac address added by option82) and someone doesn't have it ...
>> All this leases come from the CMTS relay ... so I should have
>> agent.remote-id line for each lease ?
>> Anyone have an idea ?
> Any broadcast requests, such as DHCPDISCOVER will be forwarded by the
> relay, but once the client has a lease it uses unicast requests direct
> to the dhcp server to renew the lease. The dhcp relay is not used with
> these, so it has no chance to add its remote id option.
> There is a setting you can add to dhcpd.conf to store the agent options
> on the lease so that they will be there for renews:
> stash-agent-options flag;
> If the stash-agent-options parameter is true for a given
> client, the server will record the relay agent information
> options sent during the client's initial DHCPREQUEST mes-
> sage when the client was in the SELECTING state and behave
> as if those options are included in all subsequent DHCPRE-
> QUEST messages sent in the RENEWING state. This works
> around a problem with relay agent information options,
> which is that they usually not appear in DHCPREQUEST mes-
> sages sent by the client in the RENEWING state, because
> such messages are unicast directly to the server and not
> sent through a relay agent.
> Glenn Satchell mailto:glenn.satchell at uniq.com.au | Some days we are
> Uniq Advances Pty Ltd http://www.uniq.com.au | the flies; some
> PO Box 70 Paddington NSW Australia 2021 | days we are the
> tel:0409-458-580 tel:02-9380-6360 fax:02-9380-6416 | windscreens...
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