[j-nsp] Stub Router in OSPF

Nalkhande Tarique Abbas ntarique at juniper.net
Tue Aug 4 03:12:44 EDT 2009



The following is from RFC 2328, page 15.

"Interfaces to point-to-point networks need not be assigned IP
addresses.  When interface addresses are assigned, they are modelled as
stub links, with each router advertising a stub connection to the other
router's interface address. Optionally, an IP subnet can be assigned to
the point-to-point network. In this case, both routers advertise a stub
link to the IP subnet, instead of advertising each others' IP interface
addresses."


 
Thanks & Regards,
Tarique A. Nalkhande

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Fahad Khan
Sent: Tuesday, August 04, 2009 12:24 PM
To: Nilesh Khambal
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Stub Router in OSPF

I have seen that all the networks that are directly connected between
neighbours are there as stub lsa in database, why is that so??

R1 ---10.0.0.1/30---------------10.0.0.2/30---R2

R1 has 10.0.0.2 as stub lsa in its database....why??

regards,
On Tue, Aug 4, 2009 at 11:44 AM, Nilesh Khambal
<nkhambal at juniper.net>wrote:

> I think it is becuase no adjacencies are formed on the loopback
> interface.
>
> Thanks,
> Nilesh
>
>
> --------------------------------------------------
> Sent from my mobile handheld device
>
> On Aug 3, 2009, at 11:36 PM, "Fahad Khan" <fahad.khan at gmail.com>
wrote:
>
> > Dear All,
> >
> > Why in Junos, a Loopback Network is always advertised as a stub
> > route/LSA
> > (even if it is associated in the OSPF instance)???
> >
> > Thanks in advance,
> > regards,
> > --
> > Muhammad Fahad Khan
> > IT Specialist
> > Global Technology Services, IBM
> > fahad at pk.ibm.com
> > +92-321-2370510
> > +92-301-8247638
> > http://www.linkedin.com/in/muhammadfahadkhan
> > http://fahad-internetworker.blogspot.com
> > _______________________________________________
> > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/juniper-nsp
>



-- 
Muhammad Fahad Khan
IT Specialist
Global Technology Services, IBM
fahad at pk.ibm.com
+92-321-2370510
+92-301-8247638
http://www.linkedin.com/in/muhammadfahadkhan
http://fahad-internetworker.blogspot.com
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