[LARTC] tcpdump output --zebra ospfd

[LARTC] tcpdump output --zebra ospfd

[Sanjeev Lakshmanan]

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.



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