Dell PowerEdge M520 Dell Converged Enhanced Ethernet Administrator's Guide - Page 116

Multicast traffic, Mapping CoS-to-Traffic-Class, TABLE 19

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10 Queueing TABLE 18 Default user priority for unicast traffic class mapping (Continued) User priority Traffic class 3 3 4 4 5 5 6 6 7 7 You are allowed to override these default traffic class mappings per port. Once the traffic class mapping has been resolved it is applied consistently across any queueing incurred on the ingress and the egress ports. Multicast traffic Fabric OS v6.3.1_cee supports four multicast traffic classes for isolation and to control servicing for different priorities of application data. Traffic classes are numbered from 0 through 7, with higher values designating higher priority. The traffic class mapping stage provides some flexibility in queue selection. Table 19 presents the Layer 2 default traffic class mapping supported for a COS-based user priority to conform to 802.1Q default mapping. TABLE 19 Default user priority for multicast traffic class mapping User Priority Traffic class 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 Once the traffic class mapping has been resolved for ingress traffic, it is applied consistently across all queueing incurred on the ingress and egress ports. Mapping CoS-to-Traffic-Class To map a CoS-to-Traffic-Class, perform the following steps from Privileged EXEC mode. 1. Enter global configuration mode. switch#configure terminal 2. Create the CoS-Traffic-Class mapping by specifying a name and the mapping. switch(config)#qos map cos-traffic-class test 1 0 2 3 4 5 6 7 98 Dell Converged Enhanced Ethernet Administrator's Guide 53-1002116-01

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98
Dell Converged Enhanced Ethernet Administrator’s Guide
53-1002116-01
Queueing
10
You are allowed to override these default traffic class mappings per port. Once the traffic class
mapping has been resolved it is applied consistently across any queueing incurred on the ingress
and the egress ports.
Multicast traffic
Fabric OS v6.3.1_cee supports four multicast traffic classes for isolation and to control servicing for
different priorities of application data. Traffic classes are numbered from 0 through 7, with higher
values designating higher priority. The traffic class mapping stage provides some flexibility in queue
selection.
Table 19
presents the Layer 2 default traffic class mapping supported for a COS-based user priority
to conform to 802.1Q default mapping.
Once the traffic class mapping has been resolved for ingress traffic, it is applied consistently
across all queueing incurred on the ingress and egress ports.
Mapping CoS-to-Traffic-Class
To map a CoS-to-Traffic-Class, perform the following steps from Privileged EXEC mode.
1.
Enter global configuration mode.
switch#
configure terminal
2.
Create the CoS-Traffic-Class mapping by specifying a name and the mapping.
switch(config)#
qos map cos-traffic-class test 1 0 2 3 4 5 6 7
3
3
4
4
5
5
6
6
7
7
TABLE 19
Default user priority for multicast traffic class mapping
User Priority
Traffic class
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
TABLE 18
Default user priority for unicast traffic class mapping
(Continued)
User priority
Traffic class