OSPF redistribution intra-area

[cbrun]

I have a static route in an ABR that I would like to have advertised in OSPF. The router config is:

router ospf 100

log-adjacency-changes

summary-address 106.40.0.0 255.255.240.0

summary-address 106.40.16.0 255.255.240.0

redistribute static subnets

network 106.40.0.0 0.0.15.255 area 0.0.0.0

network 106.40.16.0 0.0.15.255 area 11.11.11.11

!

ip classless

ip route 106.40.29.17 255.255.255.255 106.40.19.242

ip route 106.40.178.18 255.255.255.255 106.40.19.244

What is interesting is the the static route for the intER-area address (106.40.178.18) works and is seen in the routing tables across the network. However, the static entry for the subnet that is intRA-area (106.40.29.17) is NOT distributed. Why?

Thanks.

[Richard Burts]

Chris

I believe that it is because that static route is included within the range of one of your summary routes:

summary-address 106.40.16.0 255.255.240.0

The details included within the summary are not advertised as the summary is advertised.

HTH

Rick

[Edison Ortiz]

Please post the output from typing

show ip route 106.40.29.17

and

show ip ospf data | i 106.40.29.

from this router.

Edit: Nevermind, good catch by Rick. The summary-address is the culprit here.

__

Edison.

[Mohamed Sobair]

Hi,

Rick , Edison , I guess you didnt check the exact summary-address and the static route.

The summary: 106.40.16.0 255.255.240.0, doesnt include 106.40.178.18/32

this summary will start match the 3rd octet of 106.40.16.0 till 31.

so it would be: 106.40.16.0 -- 106.40.31.255

Hence: The static for 106.40.29.17/32 is part of the summary:106.40.16.0 255.255.240.0 , That's why its not included.

HTH

Mohamed

[Richard Burts]

Mohamed

In what way do you think that I did not check the exact summary-address? The point that I made is exactly the same as the point that you make here. And the summary address command that I included in my post is exactly the one that you discuss in your post.

HTH

Rick

[Edison Ortiz]

Mohamed,

Read the question again, the OP says that 106.40.178.18/32 works and he wants 106.40.29.17/32 to work the same way. The reason it doesn't work is due to the summary-address. I believe we are all in agreement, right?

[cbrun]

Thanks guys ... but shouldn't the summary only take effect on interAREA routes? No summarization should be taking place within the area ... right?

[Edison Ortiz · Accepted solution]

summary-address summarizes external routes while area range summarizes inter-area routes.

The routes in question are both external, they are brought into OSPF via redistribution. They aren't neither intra-area nor inter-area.

HTH,

__

Edison.

[Mohamed Sobair]

Rick , Edison,

I apologize. I didnt read the question well.

HTH

Mohamed