From: Tony Paterra (apaterra@gmail.com)
Date: Mon Jun 05 2006 - 13:04:34 ART
All,
Between the DocCD and previous posts I'm a little bit confused
regarding how DHCP works with remote DHCP servers... From what I
understand...
If you have a router acting as a relay agent (i.e. there is no DHCP
server local to the LAN), you configure a 'helper address' that
points to the real DHCP server under the LAN interface you want to
provide DHCP services to (basically for the relay agent router to
forward all DHCP messages to). Where I start to get confused is when
the documentation starts talking about the giAddr field and what that
is set to? Also when do you need to use Option 82 and configure
classes? And when you configure your helper addresses, can they be
any IP address on the DHCP server (e.g. a loopback that is in your
routing table)?
As an example:
If Router A is acting as a relay agent for two directly connected LAN
segments (we'll call them Ethernet0/0 and Ethernet0/1) and relaying
to Router B (who is acting as the DHCP server) how does Router B
figure out which pools to map the two different LAN segments on
Router A to?
ASCII Visio:
E0/0 and E0/1 on RouterA <--Serial0/0--> RouterB (acting as DHCP server)
From previous posts...
<snip>
Hello,
Basically, DHCP server consults either incoming interface or "giaddr"
field (relay agent IP) in DHCP packet.
HTH
Petr
</snip>
Tony Paterra
apaterra@gmail.com
This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:32 ART