DHCP Relay
William Jobs
wllmjbs at gmail.com
Tue Apr 28 12:56:54 UTC 2009
Thanks for the info. It appears I misunderstood. My understanding was that
the remote-id option was added by the DHCP relay server...
I'm running version 3.1.1 on a Linux platform.
On Tue, Apr 28, 2009 at 2:59 PM, Glenn Satchell
<Glenn.Satchell at uniq.com.au>wrote:
>
> >Date: Tue, 28 Apr 2009 13:17:36 +0300
> >From: William Jobs <wllmjbs at gmail.com>
> >
> > I'd also appreciate it if someone could let me know, if I'm attempting
> > something that is just not possible. That way I could stop banging my
> head
> > against the wall :)
> >
> >
> > On Tue, Apr 28, 2009 at 12:49 PM, William Jobs <wllmjbs at gmail.com>
> wrote:
> >
> > > Hi all,
> > >
> > > I've been trying out ISC's dhcp software as a relay server and
> everything
> > > is working fine except for the remote-id sub-option of Option 82. For
> some
> > > reason dhcrelay will not include this sub-option in the packets it
> forwards
> > > to the DHCP server. I get the circuit-id sub-option, just fine.
> > >
> > > Is there a specific way to enable this feature? I'm currently running
> > > dhcrelay as follows for debugging purposes:
> > >
> > > dhcrelay -d -a 10.0.0.1
> > >
> > > Any help would be appreciated.
> > >
> > > Thanks.
>
>
> Which version of dhcrelay and dhcpd are you using? What platform? (linux,
> *bsd,
> solaris, hp and so on...)
>
> This is from the 4.1.1b1 dhcrelay man page, note the last sentence.
>
> -a Append an agent option field to each request before
> forwarding it to the server. Agent option fields in
> responses sent from servers to clients will be stripped
> before forwarding such responses back to the client.
> The agent option field will contain two agent options:
> the Circuit ID suboption and the Remote ID suboption.
> Currently, the Circuit ID will be the printable name of
> the interface on which the client request was received.
> The client supports inclusion of a Remote ID suboption
> as well, but this is not used by default.
>
> This is the equivalent section from the 3.1.1 dhcrelay man page.
>
> If the -a flag is set the relay agent will append an agent
> option field to each request before forwarding it to the
> server. Agent option fields in responses sent from servers
> to clients will be stripped before forwarding such responses
> back to the client.
>
> The agent option field will contain two agent options: the
> Circuit ID suboption and the Remote ID suboption.
> Currently, the Circuit ID will be the printable name of the
> interface on which the client request was received. The
> client supports inclusion of a Remote ID suboption as well,
> but this is not used by default.
>
> So it seems the remote-id is not added by default. The remote-id is
> mentioned in the source, but there is no way to set it. Looks like if
> the packet arrives with a remote-id then the remote-id will not be
> removed.
>
> Sorry it's not much use to you...
>
> regards,
> -glenn
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
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