From: Menga, Justin (Justin.Menga@xxxxxxxxxx)
Date: Tue Jan 08 2002 - 06:16:40 GMT-3
Hi,
A field exists within the DHCP packet called 'giaddr' which includes the
LAN IP address of the DHCP relay agent that generated the request. This
is what the DHCP server looks at...
Regards,
Justin Menga CCIE#6640 CCDP CCNP+Voice+ATM CSS1 MCSE+I CCSE
Network Solutions Architect
Wireless and E-Infrastructure
Compaq Computer NZ
*+64-9-918-9381
fax +64-9-918-9592
* http://www.compaq.co.nz
-----Original Message-----
From: Rob Hopkins [mailto:rshopkins@earthlink.net]
Sent: Tuesday, 8 January 2002 9:49 p.m.
To: Menga, Justin
Subject: Re: DHCP Relay Actions
It must use the same ip address/subnet as the request was generated on,
if it sent the serial IP, how would the DHCP server reference the LAN
address? it could not..
Thanks,
Rob Hopkins
CCIE #7428, MCSE, MCNE
----- Original Message -----
From: "Menga, Justin" <Justin.Menga@compaq.com>
To: <ccielab@groupstudy.com>
Sent: Monday, January 07, 2002 11:00 PM
Subject: DHCP Relay Actions
> Hi,
>
> Consider the following:
>
> DHCP Server(192.168.1.1)----WAN----(s0)Router(e0)----DHCP Client
>
> The Router has the following config:
>
> interface e0
> ip helper-address 192.168.1.1
>
> When the router relays a DHCPREQUEST to the DHCP server, does the
> router use the IP address of s0 as the source of the IP datagram, or
> the IP address of e0 as the source of the IP datagram?
>
> This is an important issue for VPN/DHCP Relay interoperability...
>
> Regards,
>
> Justin Menga CCIE#6640 CCDP CCNP+Voice+ATM CSS1 MCSE+I CCSE Network
> Solutions Architect Wireless and E-Infrastructure
> Compaq Computer NZ
>
> *+64-9-918-9381
> fax +64-9-918-9592
> * <http://www.compaq.co.nz/> http://www.compaq.co.nz
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