tcpdump mailing list archives
Re: Linux Frame-Relay and misc
From: Guy Harris <guy () alum mit edu>
Date: Fri, 17 Oct 2003 17:13:20 -0700
On Sat, Oct 18, 2003 at 01:35:18AM +0200, Krzysztof Halasa wrote:
Guy Harris <guy () alum mit edu> writes:It can also be Q.933 call control, which is what I was really asking about - i.e., it's more than just LMI (Q.933 annex A), it's Q.933 in its entirety. I think the 0x08 stuff from RFC 2427 is for stuff other than DLCI 0 (or the D-channel, if you have one).It seems it's for both LMI 0 (certainly) and for other things. Not sure if you can have D-channel on FR (isn't it an ISDN-only thing?)
Well, Q.922 is entitled "ISDN DATA LINK LAYER SPECIFICATION FOR FRAME MODE BEARER SERVICES"; I have the impression you can connect to a Frame Relay network over an ISDN link (i.e., the user-to-network interface, if that's the right term, is over an ISDN basic rate or primary rate connection). The page at http://www.frforum.com/basicguide/chap3.html says ISDN and Switched Access for PVCs and SVCs Access on demand for PVCs and SVCs, whether via Integrated Services Digital Network (ISDN) or switched access is another method to reach the frame relay network. Access on demand holds a great deal of promise for remote locations accessing high-speed frame relay implementations. In switched access, a circuit-switched connection to the frame relay switch can be established using the existing voice network. An indication is then sent to the switch that a frame relay call is being established; the switch makes the connection and bills the call appropriately. The customer pays only for the use of the local loop when needed, without requiring PVCs at the user-to-network interface. The same benefits are true for ISDN access and E.164 addressing and lead to true, any-to-any connectivity through ISDN or switched access. - This is the TCPDUMP workers list. It is archived at http://www.tcpdump.org/lists/workers/index.html To unsubscribe use mailto:tcpdump-workers-request () tcpdump org?body=unsubscribe
Current thread:
- Linux Frame-Relay and misc Krzysztof Halasa (Oct 03)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 06)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 06)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 16)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 16)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 16)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 17)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 17)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 17)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 18)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 06)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 06)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 17)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 17)
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 18)
- Re: Linux Frame-Relay and misc Guy Harris (Oct 16)
- <Possible follow-ups>
- Re: Linux Frame-Relay and misc Krzysztof Halasa (Oct 12)