The MPLS WG Archive

["Ferrell, William" <William.Ferrell@titan.com>]

Nurit/ Alia 

I'd like to look at LDP from from a simular perspective but concentrate on
securely binding the signaled PW as well as the entire LDP signaling
protocol. 
In the past LDP has been a notoriously clear-text protocol simular to  Cisco
CDP or any other L3 routing protocols without any authentication scheme.
I've yet to learn of a defined secure LDP protocol. 

Will


-----Original Message-----
From: Nurit Sprecher [mailto:nurit.sprecher@SeabridgeNetworks.com]
Sent: Monday, March 24, 2003 3:26 AM
To: 'Shahram Davari'; 'Alia Atlas'; Nurit Sprecher
Cc: mpls@UU.NET; Mustapha Aissaoui (E-mail)
Subject: RE: Distributing Labels for PWs within an LSP TE Tunnel 


Thanks for your responses.
I do look for a way to bind the (LDP) signaled PWs to the (RSVP-TE) signaled
transport tunnel LSP, in a way that both PEs know about it. 
As I understand from your response, I should signal that the PWs within the
TE tunnel LSP.
Is there a way to signal 'TE' PWs?

-----Original Message-----
From: Shahram Davari [mailto:Shahram_Davari@pmc-sierra.com]
Sent: Friday, March 21, 2003 7:06 PM
To: 'Alia Atlas'; Nurit Sprecher
Cc: mpls@UU.NET; Mustapha Aissaoui (E-mail)
Subject: RE: Distributing Labels for PWs within an LSP TE Tunnel 

Alia,

I think Nurit's question was how can we bind a PW to a transport LSP, in a
way that both PE's know about it? This would be useful if LDP uses
per-interface label space.

An extension to PW signaling may be needed. Or a DoD label request that is
pushed inside
the tunnel LSP could be used.

-Shahram



>-----Original Message-----
>From: Alia Atlas [mailto:aatlas@avici.com]
>Sent: Thursday, March 20, 2003 2:08 PM
>To: Nurit Sprecher
>Cc: mpls@UU.NET
>Subject: Re: Distributing Labels for PWs within an LSP TE Tunnel
>
>
>At 11:42 AM 3/20/2003 +0200, Nurit Sprecher wrote:
>
>>Hi all,
>>
>>I am looking for a method for distributing PWs' labels of PWs
>within a TE
>>LSP tunnel.
>>The TE tunnel is signaled using the RSVP-TE signaling
>protocol. Is there a
>>method for distributing labels for PWs that should run within
>TE LSP tunnel?
>>I am aware of the IETF draft for signaling the PWs' labels
>using the LDP
>>protocol, but I would like to attach a certain PW with a
>certain TE LSP
>>tunnel. How can I gain it? Maybe I should activate the LDP
>for a certain PW
>>within the required tunnel (inband)? Is there another way to
>do it but not a
>>static one (by configuration)?
>
>Hi,
>
>You can use a targeted LDP session to distribute the labels for a PW
>between the two PEs.  How that PW travels across the PSN is
>independent of
>how the labels for the PW were distributed.  Thus, the PW
>could use either
>an LDP LSP or a RSVP-TE LSP to reach the egress PE.  Which one
>to use and
>how the PW is mapped to it is an internal issue on the ingress PE.
>
>Alia
>
>
>>I wonder also if there is a way to signal a TE PW?
>>
>>I'll appreciate your response.
>>Thanks in advance, Nurit.
>
>