I got some problems with DHCP relay, I hope somone can help me out!
I've set up the environment in my lab and get the same result:
* Client (set to DHCP)
* Router 1 (Cisco 871) (LAN IP-add (VLAN1): 1.1.1.1/8)
* Router 2 (Cisco 871) (LAN IP-add: 3.3.3.1/8)
* DHCP-server (IP-add: 3.3.3.3/8)
I set the IP helper command on VLAN 1 on Router 1 to 3.3.3.3.
With Etherreal on the client I can see the DHCP-discover-packets go out.
And with Etherreal on the DHCP-server I can see the discover-packets arrive and dchp-offer-packets go back out.
With 'debug ip udp', 'debug ip dhcp packet' and accesslists set to the interfaces with log command on the interfaces on Router1 I can see the dhcp-offer arrive, but the Router1 doesn't forward this information to the client.
Instead the router sends back an ICMP - UDP Port unreachable to the DHCP server?!?
Can someone please explain to me what's going on here? :-)
