shafer@handel.CS.ColoState.Edu (spencer shafer) (06/27/91)
By implementing QLLC on my IBM beastie, can I run both SNA and OSI protocols over the same X.25 link? Have been told that this would eliminate the need for a separate connection for each. True? Dave Love ******************************************** * SPENCER SHAFER * * shafer@handel.cs.colostate.edu * ********************************************
dls@achilleus.austin.ibm.com (David Skeen) (06/28/91)
In article <15733@ccncsu.ColoState.EDU> shafer@handel.CS.ColoState.Edu (spencer shafer) writes:
By implementing QLLC on my IBM beastie, can I run both SNA and OSI
protocols over the same X.25 link? Have been told that this would
eliminate the need for a separate connection for each. True?
If your beastie is a 9370, you can define one LINE under the X.25 PORT
(in the PACKET major node) with USER=VCNS. That LINE is used for
multiple OSI/CS virtual circuits. This holds for VM/VTAM V3R3 and the
corresponding VSE release.
--
Dave Skeen IBM Internal: dls@achilleus.austin.ibm.com
D61/803 Zip 2603 IBM VNET: SKEEN at AUSTIN
Austin, TX 78758 Internet: dls@dce.austin.ibm.comeskovgaa@CUE.BC.CA (Erik Skovgaard) (06/28/91)
QLLC is just another "transport" protocol. It is indicated in the X.25 Call Request packet by a special value in the Protocol Identifier (Hex C3). Since Call Requests are done seperately for each logical channel, you can run a QLLC channel concurrent with X.28 channels an others. All this assumes, of course, that you can support more than one logical channel per link. You normally arrange that with your network supplier beforehand. Have fun, ....Erik.
jrp@ESD.3Com.COM (John Pickens) (06/29/91)
The answer is yes. QLLC is a mapping of SDLC onto X.25 connections,
with the Q-bit being used to differentiate I-Frames and S-Frames. QLLC
uses one X.25 session per logical SNA link (links are point-to-point
between logically adjacent nodes).
So architecturally you can have SNA traffic concurrent with other X.25
users, but your access point has to support it.
JP
- ---------------------- Replied Message Body -----------------------
Date: 6-27-91 12:31am
From: {shafer@handel.CS.ColoState.Edu}:ugate:3Com
To: ISO Folks:hq:3Com
Subj: QLLC
Return-Path: {iso-relay@nic.ddn.mil}:ugate:3Com
- -----------------------
Original header follows:
Date: 26 Jun 91 22:36:33 GMT
From: shafer@handel.CS.ColoState.Edu (spencer shafer)
Organization: Colorado State University, Fort Collins, CO 80523
Subject: QLLC
To: iso@nic.ddn.mil
- -----------------------------------------------------------------
By implementing QLLC on my IBM beastie, can I run both SNA and OSI
protocols over the same X.25 link? Have been told that this would
eliminate the need for a separate connection for each. True?
Dave Love