[j-nsp] OSPF external routes in database but not in routing table

Mohammad Salbad masalbad at gmail.com
Mon Apr 28 18:23:43 EDT 2014


1.1.1.1 is PE router id

so far we believe the issue is due to DN bit is set by the provider and
hence the external routes are not injected in the routing table...as per
Alberto Santos below reply to me:

" as expected in rfc4577, Type 5 LSA must set DN bit, if the router does not
set it, domain tag should be used instead. I believe the PE router is
setting the DN bit and because of the routing instance was config as VRF it
is not installing the route, I think you should change to VR type instead."

So I'm wondering if there is any way to ignore the DN bit for the external
routes received from the provider ospf link? That I don't want to keep the
instance type to be vrf NOT VR...

Regards
M. Salbad

-----Original Message-----
From: Payam Chychi [mailto:pchychi at gmail.com] 
Sent: Tuesday, April 29, 2014 2:17 AM
To: Mohammad Salbad; juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] OSPF external routes in database but not in routing
table

Hi Mohammad,

- Any route-maps preventing the prefix from being installed?
- How are you learning 1.1.1.1?


Payam

On 2014-04-28, 2:13 PM, Mohammad Salbad wrote:
> Dear Experts
>
>   
>
> we have an MX router connected to a service provider network which 
> provides us with OSPF L3VPN connectivity with remote branches.
>
>
>
> at the beginning we used to have our connection with the provider into 
> a routing instance with type virtual router and we were able to 
> receive external routes from remote branches from our provider ospf 
> link.
>
> for special purposes we decided to change the instance type to be vrf 
> in our MX  router.
>
> once we have changed the instance type to be vrf external routes 
> received through our provider connection are no longer in the routing 
> table although they are in the ospf data base????
>
>   
>
> Below is a sample of ospf database for one of the external routes 
> which were not injected in routing table
>
>   
>
> Extern   10.10.10.10   1.1.1.1   0x80003a74   893  0x82 0x347d  36
>
>    mask 255.255.255.252
>
>    Topology default (ID 0)
>
>      Type: 2, Metric: 1, Fwd addr: 0.0.0.0, Tag: 0.0.0.0
>
>    Aging timer 00:45:07
>
>    Installed 00:14:52 ago, expires in 00:45:07
>
>    Last changed 01:03:59 ago, Change count: 1
>
>   
>
> Any Ideas???
>
>   
>
> Regards
>
> M. Salbad
>
>   
>
>   
>
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