OSPF LSA3 on ABR

GRANT3779 · ‎09-03-2014

Hi,

I'm looking on an ABR and see the following below -

Now does this mean that these LSA 3s are being advertised from Area 11 into Area 0? Or are these being advertised from Area 0 into Area 11?
I'm a bit confused as to what is being represented here. I guess I'm just used to seeing the type 3 LSAs on an Internal router only and not from ABR perspective.

192.168.240.1 - Is the Router ID of the ABR that I'm pulling this info from.

Summary Net Link States (Area 11)

Link ID ADV Router Age Seq# Checksum
10.44.0.0 192.168.240.1 330 0x80000001 0x006049
10.44.1.0 192.168.240.1 330 0x80000001 0x005553
10.44.10.0 192.168.240.1 330 0x80000001 0x00F1AD
10.52.0.0 192.168.240.1 30 0x8000007E 0x008909
10.52.3.0 192.168.240.1 30 0x8000007E 0x006827
10.52.4.0 192.168.240.1 30 0x8000007E 0x005D31
172.25.132.0 192.168.240.1 542 0x8000003D 0x005D6A
172.27.4.0 192.168.240.1 290 0x80005513 0x00812F

Akash Agrawal · ‎09-03-2014

Hi,

These are LSA of area 0 which will be advertised to area 11.

Since these are summary LSA in area 11, then it can not be LSA of area 11. Similarly LSA1,LSA2 of area 11 will be seen on ABR twice. First as LSA1,LSA2 of area 11, second summary LSA of area 0.

Regards,

Akash