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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
show queue
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:
·
There are no drops or interleaves for the LLQ for voice.
·
For mission-critical, Gold traffic, data is randomly dropped, tail dropped, and interleaved as needed.
WAN-AGG-7200#show queue multilink 1
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 278264
Queueing strategy: weighted fair
Output queue: 302/1000/64/278264/21900
(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
...
The following shows the queue for Voice (DSCP 46):
·
The first six bits of ToS Byte are set to 101110.
·
The last two bits set to 00.
·
The total ToS Byte Value is 10111000, or 184 in decimal.
(depth/weight/
total drops/no-buffer drops/interleaves)
1/0/
0/0/0
Conversation 264, linktype: ip, length: 90
source: 10.1.1.10, destination: 10.1.40.100, id: 0x806A, ttl: 127,
TOS:
184 prot: 17, source port 1098, destination port 14046
...
The following shows the queue for mission-critical/Gold application 1 data (DSCP 18):
·
The first six bits of ToS Byte are set to 010010.
·
The last two bits set to 00.
·
The total ToS Byte Value is 01001000 or 72 in decimal.
(depth/weight/
total drops/no-buffer drops/random/tail/interleaves)
41/62/
3142/400/734/2008/9055
Conversation 266, linktype: ip, length: 1502
source: 10.1.1.10, destination: 10.1.40.100, id: 0x7437, ttl: 127,
TOS:
72 prot: 17, source port 1071, destination port 14021
show frame-relay pvc
This example is the output of voice and data policies over a 512 kbps Frame Relay PVC with FRF.12
enabled on a non-distributed platform. In this example, you will note that:
·
There are no drops for voice traffic.
·
There are no drops for voice-control traffic.
·
Within the gold data, drops are increasing according to the drop-preference bit.
·
Within the silver data, drops are increasing according to the drop-preference bit.
·
Within the best-effort traffic, drops are increasing according to the drop-preference bit.
·
The default queue depth is 128 (compared to non-distributed point-to-point links, where the queue
depth is 40).