From: Minnick, Steve (sminnick@bcit.cc)
Date: Tue Feb 11 2003 - 15:07:01 GMT-3
Yes it is Proprietary. Your best bet will be to use PPP encapsulation. Below is brief explanation.
HDLC is the default encapsulation used by Cisco routers over synchronous serial links. HDLC is a bit-oriented ISO standard Data Link layer protocol. It specifies a method to encapsulate data over synchronous serial links using frame characters and checksums. HDLC is a point-to-point protocol used on leased lines between Cisco devices. If you need to establish a link between a Cisco device and a non Cisco device, you must use PPP encapsulation instead of HDLC. No authentication can be used with HDLC. The reason each vendor has a proprietary encapsulation of HDLC is that they each have a different way for the HDLC protocol to communicate with the Network layer protocols, and the ISO standard doesn't allow for multiple protocols on a single link. They needed a way for HDLC to communicate with layer-3 protocols so HDLC can carry more than one type of protocol.
Steven S. Minnick - CCNP/CCDP/CCAI/EE
Cisco Regional Academy Coordinator
Burlington County Institute of Technology
10 Hawkins Road
Medford, New Jersey 08055
www.bcit.cc/cisco
-----Original Message-----
From: stefan vogt [mailto:stefan-uwe_vogt@web.de]
Sent: Tuesday, February 11, 2003 10:34 AM
To: ccielab@groupstudy.com
Subject: Is Cisco HDLC encapsulation proprietary?
Hi all,
I'm just trying to get a HDLC connection between a Cisco router and a Bintec router to work. I already disabled keepalives on the Cisco side, but it still doesn't work. Is there anything special with the Cisco HDLC encapsulation (ie. proprietary)?
TIA,
Stefan ______________________________________________________________________________
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