I have several 56k frame-realy sites that have an 805 router. The 805 routers replaced old 3com Netbuilder routers, although the circuit did not change at all. I used to be able to drive these circuits at 56k, but since the introduction of the 805's, I can't seem to drive the line beyond about 20k. We have done a lot of work with the carrier to determine what the problem might be, but we are coming up blank. We have even increased the CIR to 56k at one site to no effect. Basicaly, I can't get the interface to transmit at more than 118/255 - that's where the serial connection sits. This is across PVC's that are Frame to ATM and FRame to FRame. Here's a sample config piece from my 805:
St-Georges#sh run int ser 0
Current configuration : 224 bytes
no ip address
encapsulation frame-relay IETF
frame-relay class thomas
frame-relay lmi-type cisco
hold-queue 256 in
hold-queue 1024 out
St-Georges#sh run int ser 0.18
Current configuration : 211 bytes
interface Serial0.18 point-to-point
description Frame-relay connection to Winnipeg ATM interface
VC List Rate Limit bits/int bits/int (ms) (bytes) Active
18 56000 875 56000 0 125 875 -
As I said, I have at 7 or 8 sites that behave like this. Generally, the configs are very vanilla - no traffic shaping and only an interface DLCI specified. Last night I worked with our carrier trying to figure this out, and it's very perplexing. No errors after running an extended ping of large packets, just poor throughput. No FECN, No BECN, no errors, no input or output drops??? I did all of this testing withour registering an input error (the counter is still at 2 as I type this), yet no matter what I cannot drive the line anywhere near the CIR?
Re: Slow Frame Relay connection on Cisco 805 platform
doesn't seem to make a difference. The port speed on the physical port is 64k, pvc is 56k. I'm not sure if I can burst to 64k, but I don't think I can - never saw a speed over 56k before. I do notice there are often packets in the hold queue, input and output. Have tried different queuing mechanisms with no measurable difference. Also, I am seeing some FECN packets on this pvc now, not a lot, but a few -212 FECN's since last Thursday. Really at a loss as to what is happening here. I am leaning towards trying to code the clocking for this line and see what happens.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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