# Ldp uses 646 udp for adjacency and tcp 646 for session creation. Would you please elaborate

**URL:** <https://forum.networklessons.com/t/ldp-uses-646-udp-for-adjacency-and-tcp-646-for-session-creation-would-you-please-elaborate/5342>\
**Category:** Network Services\
**Created:** [October 31, 2018, 7:49am UTC](https://forum.networklessons.com/t/ldp-uses-646-udp-for-adjacency-and-tcp-646-for-session-creation-would-you-please-elaborate/5342 "2018-10-31T07:49:57Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)\
**Post date:** [November 9, 2018, 9:35am UTC](https://forum.networklessons.com/t/ldp-uses-646-udp-for-adjacency-and-tcp-646-for-session-creation-would-you-please-elaborate/5342/2 "2018-11-09T09:35:29Z")

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A post was merged into an existing topic: [MPLS LDP (Label Distribution Protocol)](https://forum.networklessons.com/t/mpls-ldp-label-distribution-protocol/1285)

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