Re: [mpls-linux-general] Linux-LDP configuration

[James R. L. <jl...@mi...>]

Hello,

LDP tries to map your layer 3 topology (reachability) to LSPs.  So if
you can't ping a destination before enabling LDP, LDP can not create an
LSP to that destination.

In your network every LDP speaker needs to have EXACT routes to:
-10.0.1.0/24
-10.0.2.0/24
-10.0.3.0/24
-10.0.4.0/24

Make sure to upgrade to the most recent mpls-linux (0.990) as well.

Jim

On Mon, Apr 30, 2001 at 01:20:16PM -0400, Yvan Pointurier wrote:
> Hi,
> 
> I would like to try the Linux LDP implementation but I can t make it work.
> There has been some discussion on this list about it lately so I hope
> somebody will be able to help me...
> 
> Here is my topology:
> 
> Note: I use networks 10.0.x/24 (x=1..4).
> 
> 10.0.1.2                                                         10.0.4.3
>    | eth2                                                           | eth2
>    |                                                                |
>    | eth2                                                           | eth2
> 10.0.1.3 LER A 10.0.2.2----10.0.2.3 LSR 10.0.3.2----10.0.3.3 LER B 10.0.4.2
>                 eth3         eth3         eth4         eth4
> 
> 
> LER A, LER B and LSR are (obviously) MPLS-enabled, but 10.0.1.2 and
> 10.0.4.3 are just regular BSD, MPLS-unaware, workstations.
> 
> I installed MPLS for Linux 0.700 (kernel 2.4.0-test11) and can monitor
> MPLS encapsulation thanks to ethereal on one of the MPLS-enabled machines.
> To do this, I set up the LSPs manually.
> 
> Now, I would like LDP to set up the paths for me. I use the last version
> of ldp-linux (grabbed with CVS), I do not use zebra but the linux-port
> version compiled with -DMPLS_LINUX.
> 
> On LER A:               On LSR:                 On LER B:
> add global 10.0.1.3     add global 10.0.2.3     add global 10.0.4.2
> add interface eth3      add interface eth3      add interface eth4
>                         add interface eth4
> 
> 
> Now I still have traffic between 10.0.1.2 and 10.0.4.3 but it does not use
> any MPLS LSP, just static routing.
> When I cat the /proc mpls files on any MPLS router, only mpls_in is not
> empty.
> 
> What can I do to get the expected result, ie get linux-LDP set an LSP
> between LER A and LER B (and LER B to LER A) ?
> 
> This is a very simple topology so I hope that someone already tried it.
> 
> Any help deeply appreciated,
> 
>  Yvan Pointurier
> ________________________________________________________________________
>  yv...@vi...                               University of Virginia
>  http://www.cs.virginia.edu/~yp9x/       Department of Computer Science
> 
> 
> 
> 
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-- 
James R. Leu