Data-Link Switching: Difference between revisions

Revision as of 15:12, 10 April 2008

Revision as of 05:23, 15 September 2008

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'''Data-link switching''' ('''DLSw''') is a [[tunneling protocol]] designed to tunnel unroutable, non-IP based protocols such as IBM [[Systems Network Architecture]] (SNA) and [[NetBIOS Frames protocol|NBF]] over an IP network.

DLSw was initially documented in IETF RFC 1434 in 1993. In 1995 it was further documented in the IETF RFC 1795. DSLw version 2 was presented in 1997 in IETF RFC 2166 as an improvement to RFC 1795.

[[Cisco]] Systems has its own proprietary extensions to DLSw in DLSw+. According to Cisco, DLSw+ is 100% IETF RFC 1795 compliant but includes some proprietary extensions that can be used when both devices are Cisco.<ref>{{cite web|url=http://www.cisco.com/en/US/docs/internetworking/technology/handbook/DLSw.html|title=Data-Link Switching (DLSw)|publisher=[[Cisco]]|accessdate=2008-09-15}}</ref>

Some organisations are starting to replace DLSw tunndeling with the more modern IPDLC protocol, which wraps DLC traffic at the [[Transport Layer]] rather than the [[Network Layer]].<ref>{{cite web|url=http://www-1.ibm.com/support/docview.wss?rs=852&uid=swg27006667|title=Understanding Enterprise Extender, Part 1 - Concepts and Considerations|publisher=[[IBM]]|accessdate=2008-09-15}}</ref>

==See also==

*[[IBM Systems Network Architecture]]

*[[Microsoft Host Integration Server]]

*[[Synchronous Data Link Control]]

==References==

{{reflist}}

<div class="references-small">

*[http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dlsw.htm Cisco article on DLSw]

==External links==

*[http://www.faqs.org/rfcs/rfc1434.html RFC 1434 Data Link Switching: Switch-to-Switch Protocol]

*[http://www.faqs.org/rfcs/rfc1795.html RFC 1795 DLSw Standard Version 1.0]

*[http://www.faqs.org/rfcs/rfc2166.html RFC 2166 DLSw v2.0 Enhancements]

<references/>

</div>

[[Category:Tunneling protocols]]