Allied Telesis AT-S62 - Manual (Page 276)

Chapter 15: Quality of Service
276 Section II: Advanced Operations
Examples Voice Applications
Voice applications typically require a small bandwidth but it must be
consistent. They are sensitive to latency (interpacket delay) and jitter
(delivery delay). Voice applications can be set up to have the highest
priority.
This example creates two policies that ensure low latency for all traffic
sent by and destined to a voice application located on a node with the IP
address 149.44.44.44. The policies raise the priority level of the packets to
7, the highest level. Policy 6 is for traffic from the application that enters
the switch on port 1. Policy 11 is for traffic arriving on port 8 going to the
application. The components of the policies are shown in Figure 83.
Figure 83. QoS Voice Application Example
Create Classifier
01 - Classifier ID: ..... 22
02 - Description ....... VoIP flow
.
12 - Src IP Addr ....... 149.44.44.44
13 - Src IP Mask ......
Create Flow Group
1 - Flow Group ID ............. 14
2 - Description ................... VoIP
3 - DSCP Value .................
4 - Priority ......................... 7
5 - Remark Priority ........... No
.
9 - Classifier List .............. 22
Create Traffic Class
01 - Traffic Class ID: ........ 18
02 - Desciption ................ VoIP flow
.
E - Flow Group List ......... 14
Create Policy
1 - Policy ID: .................. 6
2 - Desciption ................ VoIP flow
.
9 - Traffic Class List ......... 18
.
A - Ingress Port List ......... 1
Create Classifier
01 - Classifier ID: ..... 23
02 - Description ....... VoIP flow
.
14 - Dst IP Addr ....... 149.44.44.44
15 - Dst IP Mask .......
Create Flow Group
1 - Flow Group ID ............. 17
2 - Description ................... VoIP
3 - DSCP Value .................
4 - Priority ......................... 7
5 - Remark Priority ........... No
.
9 - Classifier List .............. 23
Create Traffic Class
01 - Traffic Class ID: ........ 15
02 - Desciption ................ VoIP flow
.
E - Flow Group List ......... 17
Create Policy
1 - Policy ID: .............. 11
2 - Desciption ............ VoIP flow
.
9 - Traffic Class List ..... 15
.
A - Ingress Port List ...... 8
Policy 6 Policy 11