FW: Running DHCP over PPP interface
adutta at telcordia.com
Wed May 24 00:44:30 UTC 2006
Folks, we have found this piece of email from this mailing list very useful.
From: dhcp-users-bounce at isc.org on behalf of Glenn Satchell
Sent: Fri 4/14/2006 11:35 AM
To: dhcp-users at isc.org
Subject: RE: Running DHCP over PPP interface
Ahhh, I hadn't thought of using it like that. That should be possible,
although the dhclient-script will need some modification so that it
doesn't try to re-initialise the PPP interface.
DHCP can be a bit fussy about broadcast ability of the interface, have
you tried compiling the client with USE_SOCKETS defined in
includes/site.h ? (This might already be the default for your platform?)
>Subject: RE: Running DHCP over PPP interface
>Date: Fri, 14 Apr 2006 10:43:37 -0400
>From: "Dutta, Ashutosh" <adutta at telcordia.com>
>Glenn thanks for your email. The applicability has been discussed in pppext
mailing list. It was suggested to use PPP to obtain IP address and use DHCP to
obtain the server address (e.g., SIP server etc.). This could be applicable in a
>In my case, I use PPP to obtain an IP address from the PPP server and use DHCP
to obtain other server related information. Thus PPP server can act like a relay
or DHCP server can always co-exist with the PPP server as well. At this time
when we run dhclient -d ppp0, the DISCOVER packet gets garbled and never reaches
the PPP server also.
>From: dhcp-users-bounce at isc.org on behalf of Glenn Satchell
>Sent: Fri 4/14/2006 6:29 AM
>To: dhcp-users at isc.org
>Subject: Re: Running DHCP over PPP interface
>>Subject: Running DHCP over PPP interface
>>Date: Thu, 13 Apr 2006 18:13:47 -0400
>>From: "Dutta, Ashutosh" <adutta at telcordia.com>
>>We are having problem running dhcpclient over a PPP interface. Does
>support PPP interface?
>Typically PPP interfaces use the PPP link control protocol (LCP) to
>acquire an IP address from the other end. I don't think DHCP will ever
>work in this situation.
>What typically happens on the 'server' end is that the remote
>access server might be configured to make a dhcp request and
>then use PPP-LCP to transmit this IP address to the other end of
>the PPP link.
>Perhaps a little more detail on what you are trying to achieve
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