RE: [MPLS] One question about LDP in RFC4447

[<Santanu.Ganguly at swisscom.com>]

Title: RE: [MPLS] One question about LDP in RFC4447

Agree with Bob.

This seems in accordance to RFC 3036 definition of Label Spaces ( section 2.2.1), LDP Indentifiers ( sec. 2.2.2) and LDP sessions and Transport ( other subsections of 2.2).

 

Best Regards

 

santanu

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From: Bob Thomas (rhthomas) [mailto:rhthomas at cisco.com]
Sent: Thursday, June 21, 2007 1:37 PM
To: Asaf Henig; chenxb at ruijie.com.cn
Cc: mpls at lists.ietf.org
Subject: RE: [MPLS] One question about LDP in RFC4447

Assuming that each LSR advertises the same LDP identifier in its link Hello's and in its targeted Hello's a single LDP session should be established.

 

Bob

---

From: Asaf Henig [mailto:ahenig at mrv.com]
Sent: Thursday, June 21, 2007 2:04 AM
To: chenxb at ruijie.com.cn
Cc: mpls at lists.ietf.org
Subject: RE: [MPLS] One question about LDP in RFC4447

The two session can and should co-exist.
The session established via the Basic Discovery
mechanism should advertise the tunnel labels.
The session established via the Extended Discovery
mechanism should advertise the vc labels (FEC 128/129)


Asaf Henig
Software Engineer
Tel: +972-4-993-6289
Fax: 972-4-989-0564
www.mrv.com



-----Original Message-----
From: chenxb at ruijie.com.cn [mailto:chenxb at ruijie.com.cn]
Sent: Wed 20/06/2007 14:01
To: vach.kompella at alcatel-lucent.com; mlasserre at alcatel-lucent.com
Cc: mpls at lists.ietf.org
Subject: [MPLS] One question about LDP in RFC4447

Hi all,
I have one question about LDP in RFC4447.
Section 5 in RFC4447 say:
    The PW label bindings are distributed using the LDP downstream
    unsolicited mode described in [RFC3036].  The PEs will establish an
    LDP session using the Extended Discovery mechanism described in [LDP,
    sections 2.4.2 and 2.5].

My question is ,
if two PE is directly connected, can LDP session be established using the
 Basic Discovery mechanism described in [LDP RFC3036, section 2.4.1] ?

I consider that in this case  the session using the Extended Discovery
mechanism is maybe the same session with using the Basic Discovery
mechanism.



Thanks and Regards

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