[j-nsp] Stub Router in OSPF

[Burhan Siddiqui]

Yes Tarique is rite @ p2p link stub question. Tarique coded the rite part of RFC. For the sake of clarity , one can understand it in these simple words,

"An OSPF router always forms an adjacency over a p2p link using an unnumbered interface and reports that connection in its router LSA using a link TYPE of 1 (P2P).
The subnets configured on those interfaces are then advertised as stub networks"

--  
 
Regards, 
Burhan Ali Siddiqui. 
 
Network Engineer.
Core Network Group. 
Supernet NOC. 
Voice : +92-321-2019267 , +92-343-3068978



--- On Tue, 8/4/09, Fahad Khan <fahad.khan at gmail.com> wrote:

From: Fahad Khan <fahad.khan at gmail.com>
Subject: Re: [j-nsp] Stub Router in OSPF
To: "Nalkhande Tarique Abbas" <ntarique at juniper.net>
Cc: juniper-nsp at puck.nether.net
Date: Tuesday, August 4, 2009, 4:09 AM

Tarique, Thank you very much

Exactly that behaviour is for ptp links and Loopbacks

regards,

On Tue, Aug 4, 2009 at 12:12 PM, Nalkhande Tarique Abbas <
ntarique at juniper.net> wrote:

>
>
> 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
> _______________________________________________
> 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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