Re: MPLS LDP ports

TCP 646. Were you not able to locate that on the DOCCD?

http://www.cisco.com/en/US/tech/tk436/tk428/technologies_q_and_a_item09186a00
800949e5.shtml

Q. What protocol and port numbers do LDP and TDP use to distribute labels to
LDP/TDP peers?

A. LDP uses TCP port 646, and TDP uses TCP port 711. These ports are opened on
the router interface only when mpls ip is configured on the interface. The use
of TCP as a transport protocol results in reliable delivery of LDP/TDP
information with robust flow control and congestion handling mechanisms.

If not, memorizing the port/protocol are the least of your worries. I can't
stress enough to know the documentation front/back/side to side. You will run
across a dozen topologies, put together in a mix that you will never see in
the real world (and a lot that you will see). For this reason, look this stuff
up. If you can't find it, google it. Use the Cisco link found and reverse
engineer that link so you know how to find it as google won't be on your
corner on lab day.

Cheers! Happy labbing.

Regards,
Jay McMickle- CCIE #35355 (RS)
Sent from my iPhone 5

On Nov 24, 2012, at 12:22 PM, Tauseef Khan <tasneemjan_at_googlemail.com> wrote:

> Could some one please clarify. Which ports i need to allow for ldp neighbor
> relationship to come up.
> Is it tcp 646 or both tcp and udp 646.
> regards
>
>
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Received on Sat Nov 24 2012 - 12:28:46 ART