Jump to content

Data link connection identifier

From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Largoplazo (talk | contribs) at 19:54, 7 September 2015 (Removing "note that". Just state facts, don't tell the reader what to do with them. using AWB). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A data link connection identifier (DLCI) is a Frame Relay 10 bit wide link-local virtual circuit identifier used to assign frames to a specific PVC or SVC. Frame Relay networks use DLCIs to statistically multiplex frames. DLCIs are preloaded into each switch and act as road signs to the traveling frames.[1]

The standard allows the existence of 1024 DLCIs. DLCI 0 reserved for ANSI/q993a LMI standard - only numbers 16 to 976 are usable for end-user equipment. DLCI 1023 is reserved for Cisco LMI - however, the numbers usable are from 16 to 1007.[2]

In summary, only numbers from 16 to 1007 are available for end users' equipment (If using Cisco LMI). The rest are reserved for various management purposes.[3] DLCI are Layer 2 Addresses that are locally significant. No two devices have the same DLCI mapped to its interface in one frame relay cloud.

References

  1. ^ "DLCI's". Retrieved 22 March 2011.
  2. ^ "Frame Relay LMI". Retrieved 2014-04-24.
  3. ^ "What is Frame Relay". Retrieved 2007-09-18.


Stub icon

This article related to telecommunications is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Data_link_connection_identifier&oldid=679948150"