[j-nsp] Issues with OSPF between J-series and SSG over a serial interface

Brandon Psmythe psmythe-lists at prostructure.com
Thu Oct 25 18:51:15 EDT 2007


Hello,

I am having an issue with OSPF between a J-series router and an SSG that
are connected via a serial interface (a T1) that is using PPP as the
encapsulation method.  We are not having any issues with OSPF between
routers and SSGs when they are connected via a fastethernet connection. 

Rough drawing of our setup:

   rtrA----[fastethernet]-----rtrB
    |                           |
    |                           |
[fastethernet]              [serial-T1]
    |                           |
    |                           |
   ssgA----[fastethernet]-----ssgB   



The J-Series router does see the SSG as an OSPF neighbor with full
adjacency:
    admin at routerA> show ospf neighbor
      Address         Interface             State      ID             
Pri  Dead
    10.21.50.1      fe-0/0/0.0             Full      172.16.1.3      
128   31 
    10.21.60.1      t1-0/0/2.0             Full      172.16.1.2        
1   34   

The SSG does see the router as an OSPF neighbor with full adjacency:
    SSGB-> get interface serial1/0 protocol ospf
    VR: trust-vr RouterId: 172.16.1.2
    ----------------------------------
    Interface: serial1/0
    IpAddr: 10.21.60.1/24, OSPF: enabled, Router: enabled
    Type: Point-to-Point  Area: 0.0.0.0  Priority: 1  Cost: 64  Passive: No
    Transit delay: 1s  Retransmit interval: 5s  Hello interval: 10s
    Router Dead interval: 40s  Authentication-Type: MD-5
    Authentication-Key: ****************
    TxKeyId: 1 RxKeyId(s): 1
    Ignore-MTU: no Reduce-flooding: no Demand-circuit: no
    State: Point-to-Point
    Neighbors:
            RtrId: 172.16.1.1 IpAddr: 10.21.60.2 Pri: 128 State: Full


However, rtrB is not learning any routes form ssgB and vice versa.  rtrB
is learning about all the networks connected to ssgB via rtrA, and ssgB
is learning about all the networks connected to rtrB from ssgA.

Does anyone have any experience with a configuration or issue similar to
this?

thanks,
    brandon

-- 
A. Brandon Psmythe                           (503) 288-1566 ext200
ProStructure Consulting                http://www.prostructure.com
High-Availability Infrastructure | Information Security | Wireless
              "Crafting Connectivity that Matters"




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