06-14-2004 10:42 AM - edited 03-02-2019 04:22 PM
We are running a dual-carrier frame environment and have noticed that we have a lot of "byte delayed" and out pkts dropped showing up on many PVCS on both ends and both carrier of our frame-network. We have tweaked Frame-Relay Traffic Maps to reflect individual carrier recommendations (ie Carrier selling OK CIR guarenteeing port speed we set MINCIR to 1/2 of a T1).
No FECNS/BECNS...the aggregation links are not oversubscribed and it appears things are dropping before they even go out...the only thing this seems to point to is either the traffic-maps or perhaps the ethernet switch where the routers terminate...but that doesnt appear to be it.
Any ideas on a good way to troubleshoot this? Buffers seem good as well
Example below:
input pkts 219232 output pkts 210021 in bytes 32300516
out bytes 64629859 dropped pkts 231 in pkts dropped 0
out pkts dropped 231 out bytes dropped 73158
late-dropped out pkts 231 late-dropped out bytes 73158
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 5107 out bcast bytes 669383
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 14w1d, last time pvc status changed 1w0d
cir 384000 bc 384000 be 0 byte limit 6000 interval 125
mincir 128000 byte increment 6000 Adaptive Shaping none
pkts 210021 bytes 44388411 pkts delayed 12361 bytes delayed 10496435
shaping inactive
traffic shaping drops 0
Queueing strategy: fifo
Output queue 0/40, 231 drop, 12361 dequeued
06-15-2004 05:14 AM
Hello there,
Try to increase the hold-queue per PVC and serial interface also.
The packets are dropped by the router so there is no FECN/BECN indication from the network as long as the traffic is respecting the contracted values.
You can try a:
CCM-EXPRESS#sh traffic-shape statistics
Acc. Queue Packets Bytes Packets Bytes Shaping
I/F List Depth Delayed Delayed Active
Fa0/0 0 54 4175 0 0 no
to see if there are any delayed packets.
Also, if the sent traffic is bursty, you can have peaks which are dropped and thus, increasing the out hold-queues (interface and FR class-map) you can eliminate the problem.
Good luck!
06-15-2004 05:15 AM
One more,
I mean, you should increase that queue:
--------------------------------------------
Queueing strategy: fifo
Output queue 0/40, 231 drop, 12361 dequeued
--------------------------------------------
REGARDS
06-15-2004 06:55 AM
Is that the Frame Relay HoldQ?
We have increased the Output and Input queues on the primary interfaces:
hold-queue 150 in
hold-queue 4000 out
Thanks again for your reply!
Alan
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide