DHCP Relay over transit-network
m.muenz at spam-fetish.org
Tue Dec 30 10:15:45 UTC 2014
I'm not an expert regarding dhcp relay, but I unterstand the principle
and got it running when DHCP server is at the other interface of the
Now I have 2 networks, connected at 2 firewalls which have a transit
LAN1: 10.0.0.0/24 - FIREWALL1 --- 10.5.5.0 transit --- FIREWALL2 - LAN2:
In both networks (LAN1, LAN2) is a DHCP server and has to be the
failover for the other one, configured via delayed replies.
When I start dhcp-relay on FW1 with "/usr/local/dhcp/sbin/dhcrelay -i
eth1 10.0.1.100", I can see the packet on FW2 going to 10.0.1.100, but
with the source ip 10.5.5.1.
The dhcp-server on LAN2 doesn't reply to this one.
Can dhcrelay work with this setup in general or isn't this possible?
Searching the web only shows me results when the dhcp server is
connected to the same firewall on another interface.
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