nanog mailing list archives
Re: FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)]
From: Dan Jones <danjones () bbn com>
Date: Wed, 02 Sep 1998 00:12:01 -0400
Scott, I'm curious. Is your assertion that "CIR is guaranteed only under "normal" conditions" based on the Frame Relay spec or a paticular vendor(s) implementation? I ask because I have been in that very debate for some time (usually with a FR vendor justifying lousey performance). My tendancy is to take the "Comitted" in CIR literally. It's my understanding that the FR congestion management routines (at least the Stratacom one - Foresight?) will only back off bursty PVC to the point where it's <= CIR. The implication then is that you'll always get at least CIR - which makes sense since that's what you're paying for. Dan At 08:45 AM 9/1/98 -1000, scott w wrote:
On Tue, 1 Sep 1998, Scott, Dan wrote: [snip]line and port, but the important parameter is the committed information
rate
you purchase from the carrier. Most of Sprint's frame relay business may[snip]from 0-56kbps. Can purchase 56kbps CIR, but it costs extra, would need[snip] CIR is guaranteed only under "normal" conditions. You won't get it under heavy congestion. Find out the MIR configured for your PVC. I don't know if they will tell you though... scott
Current thread:
- 56k modems/frame/ptp revisited (LONG) Tim Wolfe (Sep 01)
- <Possible follow-ups>
- RE: 56k modems/frame/ptp revisited (LONG) Scott, Dan (Sep 01)
- FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)] scott w (Sep 01)
- Re: FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)] Owen DeLong (Sep 02)
- Message not available
- Re: FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)] Dan Jones (Sep 02)
- Re: FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)] scott w (Sep 01)
- latency papers: 56k modems/frame/ptp revisited (LONG) bcurnow (Sep 02)
- FR Tidbit [was: 56k modems/frame/ptp revisited (LONG)] scott w (Sep 01)