Several questions as below. I thought I was not too bad on Frame Relay with
Ciscos but this one has me stumped. I cannot find documentation in depth
enough to answer my question. We have this problem whether we're adaptive
shaping
or not. IOS is 12.0(9) but we've a second box running 12.1(11) which is
configured identically which is giving us similar outputs (it's not loaded
much
at the moment and the boss starts pulling faces if I talk about shifting
production traffic in order to 'see what happens')
Curreny map settings
map-class frame-relay giving-me-no-end-of-grief
frame-relay mincir 1024000
frame-relay traffic-rate 1024000 1536000
no frame-relay adaptive-shaping
A. We're dropping packets from the queue shown at the bottom of the output
from 'sh frame-r pvc x' Firstly what is this queue ?. Secondly can I increase
it's size ?. Thirdly what are the possible causes for it dropping ?
B. Byte increment = (mincir x (interval(ms)/1000))/8
but what the hell is limit ? I would've thought it would be
('peak'*interval(ms))/1000 but a quick abacus session disproves that theory.
That gives me
96768
MUCRTO01>sh frame-r pvc 95
PVC Statistics for interface Serial1/0 (Frame Relay DTE)
DLCI = 95, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.5
input pkts 115338 output pkts 171048 in bytes 17357017
out bytes 76515575 dropped pkts 4284 in FECN pkts 54
in BECN pkts 120 out FECN pkts 0 out BECN pkts 0
in DE pkts 670 out DE pkts 0
out bcast pkts 97 out bcast bytes 12652
pvc create time 1w6d, last time pvc status changed 1w4d
cir 1024000 bc 1024000 be 512000 limit 72000 interval 63
mincir 1024000 byte increment 8000 Adaptive Shaping none
pkts 333488 bytes 149606030 pkts delayed 166744 bytes delayed
74803015
shaping active
Serial1/0.5 dlci 95 is first come first serve default queueing
Output queue 36/40, 4284 drop, 924406 dequeued
MUCRTO01>sh int s1/0
Serial1/0 is up, line protocol is up
Hardware is cxBus Serial
MTU 1500 bytes, BW 3838 Kbit, DLY 20000 usec, rely 255/255, load 78/255
Encapsulation FRAME-RELAY, crc 16, loopback not set, keepalive set (10
sec)
LMI enq sent 74, LMI stat recvd 74, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 1515/0, interface broadcasts
1383
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:12:20
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/60/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 409000 bits/sec, 236 packets/sec
5 minute output rate 1178000 bits/sec, 301 packets/sec
181273 packets input, 41743510 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
225224 packets output, 102245402 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
RTS up, CTS up, DTR up, DCD up, DSR up
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