[j-nsp] Missing OSPF routes in ABR

[Ihsan Junaidi Ibrahim]

Hi all,

For the lack of better title, I'm not quite sure how best to title the 
problem. The situation goes like this:

  R2----R3
  |      |
  |      |
R1	R4----P1----P2----R5

It's a CoC arrangement with provider P. R1, R4 and R5 are located in 
OSPF area 1500, R2 and R3 are ABRs (0 & 1500). P1 and P2 are P's CoC 
PEs. R4 and R5 are the CoC CEs.

Connectivity from R4 to R5 has been successfully established. They can 
see each other loopbacks. Ping works. R1, R2 and R3 connectivities to R4 
are also good. R1 and R4 can see R5's loopback but R2 and R3 can't. So 
traffic from R1 to R5 is blackholed at R2.

10.254.250.30 is R5 loopback. If R5 loopback NLRI is not established at 
R2 and R3, then how did R1 managed to do that?

I'm not sure if it's related but I find it interesting that at R4, R5 
loopback is received as summary LSA not as router LSA.

The following are the diagnostics that I've run.

 From R1
---
ihsan at R1> show route 10.254.250.30 table inet.0 terse

inet.0: 204564 destinations, 408396 routes (204559 active, 0 holddown, 5 
hidden)
+ = Active Route, - = Last Active, * = Both

A Destination        P Prf   Metric 1   Metric 2  Next hop       AS path
* 10.254.250.30/32   O  10         52            >211.24.210.129

R2
---
ihsan at R2> show route 10.254.250.30 table inet.0 terse

inet.0: 204621 destinations, 409809 routes (204572 active, 0 holddown, 
148 hidden)
+ = Active Route, - = Last Active, * = Bo

A Destination        P Prf   Metric 1   Metric 2  Next hop       AS path
* 0.0.0.0/0          O 150          0            >211.24.210.1

R3
---
ihsan at R3> show route 10.254.250.30 table inet.0 terse

inet.0: 204630 destinations, 410225 routes (204580 active, 0 holddown, 
146 hidden)
+ = Active Route, - = Last Active, * = Both

A Destination        P Prf   Metric 1   Metric 2  Next hop       AS path
* 0.0.0.0/0          O 150          0            >211.24.210.9

R4
---
ihsan at R4> show route 10.254.250.30 terse

inet.0: 204573 destinations, 408456 routes (204547 active, 0 holddown, 
51 hidden)
+ = Active Route, - = Last Active, * = Both

A Destination        P Prf   Metric 1   Metric 2  Next hop       AS path
* 10.254.250.30/32   O  10         49            >e1-0/2/0.0

inet.3: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

A Destination        P Prf   Metric 1   Metric 2  Next hop       AS path
* 10.254.250.30/32   L   9          1            >e1-0/2/0.0

ihsan at R4> ping 10.254.250.30 rapid count 5
PING 10.254.250.30 (10.254.250.30): 56 data bytes
!!!!!
--- 10.254.250.30 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 19.494/19.542/19.626/0.058 ms

hsan at GLSFB3_MBONE> show ospf database area 0.0.5.220 advertising-router 
58.139.71.5

     OSPF link state database, area 0.0.5.220
  Type       ID               Adv Rtr           Seq      Age  Opt  Cksum 
  Len
Router   58.139.71.5     58.139.71.5   0x800000bf  1390  0x22 0x5b4e  48
Summary  10.254.250.30   58.139.71.5   0x8000006a   381  0xa2 0x53ca  28
Summary  58.139.71.12    58.139.71.5   0x80000092   878  0xa2 0x55ac  28

OSPF database R2
---
ihsan at R2> show ospf database area 0.0.5.220 | match 10.254.250.30
Summary  10.254.250.30   58.139.71.5    0x8000006a   45  0xa2 0x53ca  28

R3
---
ihsan at R3> show ospf database area 0.0.5.220 | match 10.254.250.30
Summary  10.254.250.30  58.139.71.5    0x8000006a   108  0xa2 0x53ca  28

Any suggestions would be much appreciated.

Thank you for your time,
Ihsan Junaidi Ibrahim