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Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
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Chapter 4 QoS in an AVVID-Enabled Wide-Area Network
Verifying QoS
Class-map:
class-default (match-any)
282684 packets, 193027584 bytes
30 second offered rate 2327000 bps, drop rate 1634000 bps
Match: any
queue size 131, queue limit 256
packets output 88031, packet drops 197850
tail/random drops 197850, no buffer drops 0, other drops 0
Fair-queue: per-flow queue limit 64
Random-detect:
Exp-weight-constant: 9 (1/512)
Mean queue depth: 129
Class Random Tail Minimum Maximum Mark Output
drop drop threshold threshold probability packets
0 5894 116200 96 128 1/10 58942
2 992 20265 22 128 1/10 9913
4 1108 22389 18 128 1/10 11081
6 1237 25357 14 128 1/10 12369
48 0 0 112 128 1/10 156
Again, class 48 (IP Precedence 6) is routing traffic that has been assigned to the default queue.
show interface
This example is the output of voice and data policies over a 512 kbps multilink interface with LFI
enabled on a non-distributed platform. In this example, you will note that:
·
The txload indicates a fully-congested link.
·
There is a total of 144066 drops and 10910 interleaves.
WAN-AGG-7200#show interface multilink 1
Multilink1 is up, line protocol is up
Hardware is multilink group interface
Internet address is 10.100.40.1/30
MTU 1500 bytes,
BW 512 Kbit, DLY 100000 usec,
reliability 255/255,
txload 255/255, rxload 1/255
Encapsulation PPP, loopback not set
DTR is pulsed for 2 seconds on reset
LCP Open, multilink Open
Open: IPCP, CDPCP
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 00:03:07
Input queue: 0/75/0/0 (size/max/drops/flushes);
Total output drops: 144066
Queueing strategy: weighted fair
Output queue: 309/1000/64/144066/
10910
(size/max total/threshold/drops/
interleaves)
Conversations 7/8/256 (active/max active/max total)
Reserved Conversations 3/3 (allocated/max allocated)
Available Bandwidth 2 kilobits/sec
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 512000 bits/sec, 79 packets/sec
46 packets input, 3761 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
14361 packets output, 11733605 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions