Hi,
I am confguring a 6500 with IP helper-address.. done it before on
Why?
I thought if it caches the helper bootp request it should recognise the offer coming back!?
It is some funky ARP inspection thing (I switched it all off)..
Its a base config with secondaries on both interfaces (Vlan 2 & Vlan 3) and a helper address... thats it!
Any ideas?!
do you run proxy ARP ? Does all your SVI's have the ip helper command ? (Interface Vlan 1, Interface vlan 2 etc) Are there any ACL's ?
Can you drop the config snip-let ? Do you mean standby=secondaries or IP ? HTH Martin
Hi.. Yes secondaries.. many of them...
I have come a lot further.. I notice that the relay helper is pushing the requests forward with Src and St prt set at 67 but my server is replying back on 68... hence the port unreachable..
But it still leaves me the quetion that in the field is this still going to be a problem... will I have to PAT the replies in these instances.. does anyone know a good DHCP server that reponds correctly?!
Found this excellent link..
Well, some DHCP servers will respond on udp/67 with reply on udp/67 or udp/68 It is a setup/config problem at your DHCP server.
Are you, by any chance, setting an IP helper on an interface that is in the same subnet as the DHCP server ?
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