DHCP Relay doesn't receive OFFER msg

[sundararaman.dheivanayagam at wipro.com]

Hi,



Setup:

DHCP Server[eth0] --------[eth0]Router1 App[eth1]<----P2P link---->[tun0]Router2 App & RELAY[eth0]---------PC



DHCP Server eth0: 10.46.185.77/24

Router 1 App eth0: 10.46.185.1/24

Router 1 App eth1: 10.46.186.1/24

Router 2 App tun0: 40.40.40.40/24

Router 2 App eth0: 30.30.30.30/24



Running dhcp relay as ./dhcrelay -4 -d 10.46.185.77. Am able to ping DHCP Relay eth0 address 30.30.30.30 from DHCP server 10.46/185.77 and vice versa. Relay forward the DISCOVER to DHCP server and server responds to send OFFER to DHCP relay but relay application is not receiving and forwarding it to client. but I ran an application which listens on port 67 and interface eth0 30.30.30.30 receives the OFFER but not relay application.



Please let me know the reason. Is there any issue in ISC DHCP relay over p2p or tun link to communicate with DHCP Server.



Sundar



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