Re: Next HOP on IBGP

Hey yall,

I just labbed it up and tested w/ first ipv4 and vpnv4. As mentioned this
is normal behavior for your scenario that you described. The ebgp peer
changes the next hop automatically ...

My earlier email flip flopped between comments on ipv4 and vpnv4 and my
comments are not clear ... sorry to be confusing.

Also thanks for the question and email exchanges... always good to practice
and see this. I am glad you did since, I got a chance to do some lab
testing in order to understand the concepts better, thanks!!!

Have a good one team!

Andrew

On Tue, Aug 18, 2009 at 11:53 AM, Mark Stephanus Chandra <
mark.chandra_at_gmail.com> wrote:

> Hi Divin
>
>
>
> Thanks a lot for your explanation.
>
>
>
> I Just starting to learn MPLS. It happens to be related to my work, so I
> have to learn MPLS.
>
>
>
> So, now I clearly know this is happen in MPLS Environment. Thanks a lot for
> that.
>
>
>
> Regards
>
>
>
> Mark
>
>
>
> From: Divin Mathew John [mailto:divinjohn_at_gmail.com]
> Sent: 18 Agustus 2009 22:43
> To: mark.chandra_at_gmail.com
> Cc: Marko Milivojevic; markom_at_gmail.com; ccielab_at_groupstudy.com
> Subject: Re: Next HOP on IBGP
>
>
>
> check pg 330
>
> http://books.google.com/books?id=1ov-2vEyFCUC
> <
> http://books.google.com/books?id=1ov-2vEyFCUC&pg=PA324&lpg=PA324&dq=mpls+ne
>
>
xt-hop+behaviour&source=bl&ots=N9aa6MAgr8&sig=-rgrlFtUPgeDHv2Ktx-6y5E25hs&hl
>
>
=en&ei=JcaKSs2AKoS8jAe2-uBp&sa=X&oi=book_result&ct=result&resnum=3#v=onepage
>
&q=&f=false<http://books.google.com/books?id=1ov-2vEyFCUC&pg=PA324&lpg=PA324&
dq=mpls+ne%0Axt-hop+behaviour&source=bl&ots=N9aa6MAgr8&sig=-rgrlFtUPgeDHv2Ktx
-6y5E25hs&hl%0A=en&ei=JcaKSs2AKoS8jAe2-uBp&sa=X&oi=book_result&ct=result&resn
um=3#v=onepage%0A&q=&f=false>
> >
>
>
&pg=PA324&lpg=PA324&dq=mpls+next-hop+behaviour&source=bl&ots=N9aa6MAgr8&sig=
>
>
-rgrlFtUPgeDHv2Ktx-6y5E25hs&hl=en&ei=JcaKSs2AKoS8jAe2-uBp&sa=X&oi=book_resul
> t&ct=result&resnum=3#v=onepage&q=&f=false
>
> Sent from Qatar
>
> On Tue, Aug 18, 2009 at 6:17 PM, Divin Mathew John <divinjohn_at_gmail.com>
> wrote:
>
> I think when u use VRFs the PE router automatically changes the NEXT-HOP to
> itself. because the CE router has no idea of the PE --P --P Connections.!
> it
> only knows abt the interface in its VRF . The vrf interface.
>
> Sent from Qatar
>
>
>
> On Tue, Aug 18, 2009 at 6:07 PM, <mark.chandra_at_gmail.com> wrote:
>
> This bgp using vrf.
>
> I have asked my friend who learn mpls and he said this is a normal
> behaviour.
>
>
>
> ------Original Message------
> From: Marko Milivojevic
> Sender: markom_at_gmail.com
> To: Mark Stephanus Chandra
> Cc: ccielab_at_groupstudy.com
>
> Sent: Aug 18, 2009 20:43
> Subject: Re: Next HOP on IBGP
>
> > FYI, this is all inside the same VRF
>
> Are these VPNv4 or IPV4 sessions, then? Are you sure that "next-hop
> self" is not set for the VPNv4 AFI?
>
> I'll also second request for relevant configs and "show ip bgp"
> outputs (if it's VPNv4, then do show for relevant CRF and "vpnv4
> all")...
>
> --
> Marko
> CCIE #18427 (SP)
> My network blog: http://cisco.markom.info/
>
>
>
> Sent from my BlackBerry. wireless device from XL GPRS/EDGE/3G network
>
>
>
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--
Andrew Lee Lissitz
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Blogs and organic groups at http://www.ccie.net