Dear Sir, I have point-point ethernet connections to my linux boxes on which I am running Zebra OSPFD. I am unable to understand the output of the tcpdump. Please clarify the terms in the output. The output of the command tcpdump on BOX 1 is as follows: I have also shown a part of my network below. 14:0831.849801 eth0 M 192.168.2.2 > 224.0.0.5: OSPF v2-hello 48: rtrid 192.168.4.2 backbone dr 192.168.2.1 bdr 192.168.2.1 [ttl1] 14:0831.849801 eth1 M 192.168.1.5 > 224.0.0.5: OSPF v2-hello 48: rtrid 192.168.7.5 backbone dr 192.168.1.5 bdr 192.168.1.1 [ttl1] 14:0831.849802 eth1 > 192.168.1.1 > 224.0.0.5: OSPF v2-hello 48: rtrid 192.168.2.1 backbone dr 192.168.1.5 bdr 192.168.1.1 [ttl1] 14:0831.849802 eth0 > 192.168.2.1 > 224.0.0.5: OSPF v2-hello 48: backbone dr 192.168.2.2 bdr 192.168.2.1 [ttl1] ---------- ---------------- | BOX 2 | | BOX 3 | ---------- ---------------- eth0:192.168.1.2 =eth0:192.168.1.5 = = = = = = = ------------------- 192.168.2.1|eth0 BOX 1 eth1|192.168.1.1 ------------------- Regards, Sanjeev. __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com