The MPLS-OPS Archive

Cell Relay Retreat>MPLS-OPS Archive>month:2003-Mar> msg00061



[Date Prev][Date Next][Thread Prev][Thread Next]  
  [Date Index][Thread Index][Author Index][Subject Index]

RE: IP MPLS VPN and Cisco

  • From: Sebastien.Spas@alcatel.be
  • Date: Thu, 20 Mar 2003 09:08:59 +0100
  • Cc: "Mpls-Ops@Mplsrc. Com" <mpls-ops@mplsrc.com>, "Eric Osborne" <eosborne@cisco.com>, "Jim Guichard" <jguichar@cisco.com>, "Robert Raszuk" <raszuk@cisco.com>
  • Importance: Normal
  • Resent-Date: Thu, 20 Mar 2003 04:24:57 -0500
  • To: "Ajay Simha" <asimha@cisco.com>
  • X-MIMETrack: Itemize by SMTP Server on BEMAIL06/BE/ALCATEL(Release 5.0.11 |July 24, 2002) at03/20/2003 09:08:59,Serialize by Router on BEMAIL06/BE/ALCATEL(Release 5.0.11 |July 24, 2002) at03/20/2003 09:09:05,Serialize complete at 03/20/2003 09:09:05

Hi,

many thanks for your answers !

I saw this information in a Juniper training documentation, but it's a bit
old (more than one year). I got a paper copy of that document, and I think
it's not available on the web.




kr,
sebastien.

-----Original Message-----
From: Ajay Simha [mailto:asimha@cisco.com]
Sent: mercredi 19 mars 2003 20:44
To: Sebastien.Spas@alcatel.be
Cc: Mpls-Ops@Mplsrc. Com; Eric Osborne; Jim Guichard; Robert Raszuk
Subject: Re: [MPLS-OPS]: IP MPLS VPN and Cisco


On Wed Mar 19 19:28:26 2003, Sebastien.Spas@alcatel.be wrote:
>
>    Hi,
>
>
>
>    I saw recently a document talking about "limitations" while trying to
>    do Traffic-Engineering with MPLS VPN.
>
>
>
>    1) The LSPs going from PE to PE beeing used for IP VPNs can only be
>    LDP signaled LSP (LDP messages always follow the IGP shortest path,
>    then it's not possible to perform any Traffic Engineering which
>    requires RSVP signalled LSPs)

Not true. Which slide are you talking about? Please point me to the source.


>
>
>
>    2) Some vendors propose to provision an RSVP signalled LSP between the
>    2 P closest to the PEs, and traffic-engineer that RSVP LSP. Then, the
>    traffic is processed through the initial LDP LSP, then thourgh that
>    RSVP LSP using label stacking.

If you have RSVP-TE between 'P' devices you need to run LDP on the top - to
preserve
the inner LDP label OR turn off PHP if not the tail of the TE tunnel sees
the BGP/VPN label and drops the packet.

>
>
>
>
>
>    Do you know if this is still the case with latest versions of Cisco
>    and Juniper equipment ?

Speaking for Cisco, for a while now IOS allows you have BGP-VPN over TE with
no
LDP enabled.

-ajay
>
>
>
>
>
>    kind regards,
>
>    sebastien.

-------
The MPLS-OPS Mailing List
Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
Archive: http://www.mplsrc.com/mpls-ops_archive.shtml