[c-nsp] OSPF over virtual-access interfaces

[Bruce Pinsky]

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Jeremiah Millay wrote:
> I'm trying to set up a customer router to run ospf over their ADSL line 
> to us. Here is a crude diagram:
> 
> Customer Router (Fa0/0) -----> ADSL Modem (PPPoE Client) -----> Provider 
> Cloud -----> LNS (One of our core routers)
> 
> I enable all of the commands on the customer router for a standard ospf 
> setup. Something like:
> 
> router ospf 1
>  log-adjacency-changes
>  passive-interface default
>  no passive-interface FastEthernet0/0
>  network 209.X.X.0 0.0.0.7 area 0
> 
> 
> On our side (the LNS):
> 
> router ospf 1
>  log-adjacency-changes
>  passive-interface default
>  no passive-interface Virtual-Template1
>  network 209.X.X.0 0.0.0.7 area 0
> 
> interface Virtual-Template1
>  mtu 1492
>  ip unnumbered Loopback1
>  no logging event link-status
>  peer default ip address pool DSL-POOL
>  ppp authentication chap
> !
> 
> int loopback 2
>  ip address 209.X.X.1 255.255.255.248
> 
> 
> 
> In my RADIUS config I'm returning some specific Cisco AVPairs:
> Framed-Address = 209.X.X.2
> Framed-Netmask= 255.255.255.248
> lcp:interface-config#1=ip unnumbered loopback 2
> lcp:interface-config#2=ip ospf authentication-key somekey
> 
> 
> I'm able to get the connection working just fine. I can ping from both 
> ends with no problems. But I'm not seeing any hellos from the either 
> router crossing the link (debug ip ospf hello / debug ip ospf adj). Is 
> there some trick to creating an OSPF adjacency over virtual-access 
> interfaces? Havn't found much info on the Cisco site.
> 

What does "show ip ospf int" indicate?  I'd start without authentication
until I got the basic adjacency running.

Here is a pointer to a doc that shows some dial solutions that includes
OSPF on virtual-template interface (near the bottom of the doc).

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bep

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