RE: How to COMPLETE the END - TO - END LSP btw non-directly

well PRAKASH I fully agree with you , I have tried that also , the BGP SEND
label is working fine for one leg which only works for point-to-point link
between the ASBR R9 and the first router R6 connected to it, the problem comes
when I am trying to further expand the LSP from R6 to R2 which is another
ASBR.

R9--------R6-------R2

its only ebgp between the three and the routes are exchainging easily. The
problem is that the LSP is not completed btw these three !
R7/R8(not drawn above) which are both connected to R9 are vpnv4 peered with
R2(ebgp-multihop)
We have VRF's on R2 and R7/R8. The routes are exchanged end to end but its the
LSP making troubles.

One more point why do we require to put match mpls label and set mpls label on
R6 , since we are just running bgp labels for the both ebgp links on R6, when
its working fine for one leg (towards R9) why not for the other (towards R2)
??

Date: Sun, 5 Dec 2010 11:47:29 +0530
Subject: Re: How to COMPLETE the END - TO - END LSP btw non-directly
conncedted ASBR's in InterAS-VPN??? PLEASE Suggest ???
From: kalsaria.prakash_at_gmail.com
To: vidhatevivek_at_gmail.com
CC: s_asfar_at_hotmail.com; tscott_at_ipexpert.com; ccielab_at_groupstudy.com;
pearlgaurav_at_gmail.com

You need a send-label between R9---R6 and R6--- R2 and do not forget to set
and match the mpls label where ever necessary
Regards;Prakash Kalsariahttp://prakashkalsaria.wordpress.com

On Sun, Dec 5, 2010 at 11:42 AM, vivek vidhate <vidhatevivek_at_gmail.com>
wrote:

Hi Asfer,

Pls paste the tracroute for respective sites and ping responses along with

related configurations if possible.

So that we can troubleshoot.

On Sun, Dec 5, 2010 at 10:51 AM, Asfer Shah <s_asfar_at_hotmail.com> wrote:

> Thanks Scott for your reply !

> well I have done that at the first place and the problem is that the BGP

> send-label is working fine between the R6 and R9 , where R6 is generating

> the

> Labels for the prefixes, its the other side making troubles for God knows

> what

> reason R2 and R6 are not building up the LSP between them !!

>

> I have tried every possible thing and the LSP will not be UP !!!

> IS this a CISCO BUG ?

> I might be sounding wrong but with so many efforts i seem to lost it !!

>

>

>

> > From: tscott_at_ipexpert.com

> > To: s_asfar_at_hotmail.com; ccielab_at_groupstudy.com; pearlgaurav_at_gmail.com

> > Subject: RE: How to COMPLETE the END - TO - END LSP btw non-directly

> conncedted ASBR's in InterAS-VPN??? PLEASE Suggest ???

> > Date: Sat, 4 Dec 2010 13:46:09 -0500

> >

> > On R6 and R9 you need to make sure you do "no bgp default route-target

> > filter"

> >

> >

> >

> > For the recursive problem you need to make sure you are not announcing

> your

> > tunnel sources thru the tunnel. That is basic recursive lookup problem

> >

> >

> >

> > Regards,

> >

> >

> >

> > Tyson Scott - CCIE #13513 R&S, Security, and SP

> >

> > Managing Partner / Sr. Instructor - IPexpert, Inc.

> >

> > Mailto: tscott_at_ipexpert.com

> >

> >

> >

> >

> >

> > From: Asfer Shah [mailto:s_asfar_at_hotmail.com]

> > Sent: Saturday, December 04, 2010 12:18 AM

> > To: ccielab_at_groupstudy.com; pearlgaurav_at_gmail.com; tscott_at_ipexpert.com

> > Subject: RE: How to COMPLETE the END - TO - END LSP btw non-directly

> > conncedted ASBR's in InterAS-VPN??? PLEASE Suggest ???

> >

> >

> >

> >

> >

> > > Dear All,

> > > I have tried my luck but I am forced to drop the below scnerio in whcih

> we

> > > have inter-as VPN but the ASBR's are not directly connected ?

> > > Can any one help , I am having my brains lost with this scenerio ?

> > >

> > > R8---------R9-----------------R6--------------------R2

> > > | |

> > |

> > > | |

> > |

> > > | |

> > |

> > > | |

> > |

> > > R4 R5 R3

> > >

> > > R8 and R9 are both in same AS 789 and are Mp-BGP neighbors.

> > > R8 and R4 are PE-CE in vrf ABC-1 & R9 and R5 as PE-CE as ABC-2

> > > R6 is in AS66 and its ipv4 ebgp peered with R9 and R2.

> > >

> > > R4 and R5 can reach each other routes since the LSP is complete.

> > >

> > > We have another AS22 on R2 with R3 as in vrf ABC-3.

> > > R2 is MP-BGP Vpnv4 peered with R8. R3 can see the routes in its routing

> > table

> > > for both the cites ABC-1 and ABC-2 from R4 and R5 vice versa.

> > > But when tried to ping , there is a failure because of the incomplete

> LSP.

> > > The problem is to complete the LSP between the R2 and its Vpnv4 ebgp

> peer

> > R8.

> > >

> > > *I tried runnin LDP between R6-R9 and R6-R2 but no use since there is

> no

> > > IGP btw R9/R6/R2 so that LDP cannot generate the labels for the

> end-to-end

> > > LSP

> > >

> > > *I tried running BGP labels by mentioning the BGP send-label to the

> ipv4

> > > ebgp neibors R6-R2 and R6-R9 but the EBGP VPNv4 peering btw R2 & R8

> > break

> > > when I do this ?

> > >

> > >* I even tried configuring GRE Tunnel between R2 and R8 and ran MPLS on

> it

> > , but the tunnel comes up and then goes down after 10 secs, message comes

> > saying

> > > tunnel turned down because o recursive lookup.

> >

> > >

> > > Waiting for the experts FEEDBACK :)

> > >

> > >

> > > Blogs and organic groups at http://www.ccie.net

> > >

> > > _______________________________________________________________________

> > > Subscription information may be found at:

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> >

> >

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> >

> > _______________________________________________________________________

> > Subscription information may be found at:

> > http://www.groupstudy.com/list/CCIELab.html

>

>

> Blogs and organic groups at http://www.ccie.net

>

> _______________________________________________________________________

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>

>

>

>

>

>

>

--
Thanks & Regards,
Vivek Vidhate.
Blogs and organic groups at http://www.ccie.net