OSPF External Routes Summarization II

From: Annu (annu_roopa@xxxxxxxxx)
Date: Fri Dec 21 2001 - 03:23:00 GMT-3


   
Group,

I have the folllowing scenario.

            RIP (223.1.1.x subnets)
             |
             |
  R5--------R4------------- R10
   |<area0> | <---NSSA---->
   |
  R9

R5/R4/R9 are in Area 0.
R4 is ASBR/ABR (same as one of Doyles case studies.
R4 and R10 in NSSA area.

Configs of R4 are as follows:

r4#show runn
Building configuration...

router ospf 100
summary-address 223.1.1.0 255.255.255.0 not-advertise
 redistribute rip metric 30 subnets
 network 10.0.0.0 0.255.255.255 area 0
 network 193.1.1.0 0.0.0.255 area 2

Question: Has anyone used the not-advertise option(Ver
12.1 code).As i understand the option prevents
advertising summary address when it does Type 7
translation.

But here for network 223.1.1.x subnets i feel there IS
NO TRANSLATION NEEDED TO SEND IT TO R9/R5. i dont see
the routes on R9/R5.

I know the translation will take place on R4 for NSSA
area for R10.What am i doing wrong ? or am i
understanding it wrong ?

The database on R4 is as follows:

r4#show ip ospf database
OSPF Router with ID (223.1.1.25) (Process ID 100)

Type-7 AS External Link States (Area 2)
Link ID ADV Router Age Seq#
Checksum Tag
0.0.0.0 223.1.1.25 397 0x80000002
0x862F 0
160.1.1.0 193.1.1.1 1886 0x80000001
0x6796 0
160.1.2.0 193.1.1.1 1863 0x80000001
0x5CA0 0
160.1.3.0 193.1.1.1 1849 0x80000001
0x51AA 0
223.1.1.0 223.1.1.25 301 0x80000001
0xBE33 0

Type-5 AS External Link States
Link ID ADV Router Age Seq#
Checksum Tag
222.1.1.0 222.1.1.1 1517 0x80000005
0x8C4D 0
223.1.1.0 223.1.1.25 302 0x80000001
0x5267 0

Thanks for ur answers and replies.
Annu



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