DHCP Relay over transit-network

Muenz, Michael m.muenz at spam-fetish.org
Tue Dec 30 13:20:15 UTC 2014

Am 30.12.2014 um 14:13 schrieb Simon Hobson:
> Same thing, different names. Check on FW2 that the packets are going 
> through, and whether there is any reply at all from the server. Then 
> look at the server logs. And assuming FW2 isn't the default gateway 
> for the server at that end, check that the server (or the default 
> router) has a route to the transit network.

Packets are leaving FW2's internal interface, but no reply. I'm not the 
dhcp crack, but in the dump I'm missing the Option 82 field. Should 
there be the GIaddr?
If I start dhcrelay with "-a -m append" I can see the Option 82 field 
with the value "vlan20", which is the internal interface name.

Is this correct behavior? Shouldn't there be an IP address?


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