P And Tos/Dscp Marking And Mapping - OmniSwitch os6900 Network Configuration Manual

Policy Applications

802.1p and ToS/DSCP Marking and Mapping

802.1p values can be mapped to different 802.lp values on an individual basis or by using a map group. In
addition, ToS or DSCP values can be mapped to 802.1p on a case-by-case basis or via a map group. (Note
that any other mapping combination is not supported.)
Marking is accomplished with the following commands:
policy action 802.1p
policy action tos
policy action dscp
Mapping is accomplished through the following commands:
policy map group
policy action map
Note the following:
•
Priority for the flow is based on the policy action. The value specified for 802.1p, ToS, DSCP, or the
map group determines how the flow is queued.
•
The port on which the flow arrives (the ingress port) must be a trusted port. For more information about
trusted ports, see
In this example, a policy rule (marking) is set up to mark flows from 10.10.3.0 with an 802.1p value of 5:
-> policy condition my_condition source ip 10.10.3.0 mask 255.255.255.0
-> policy action my_action 802.1p 5
-> policy rule marking condition my_condition action my_action
In the next example, the policy map group command specifies a group of values that must be mapped; the
policy action map command specifies what must be mapped (802.1p to 802.1p, ToS/DSCP to 802.1p) and
the mapping group that must be used. For more details about creating map groups, see
Groups" on page 25-61.
Here, traffic from two different subnets must be mapped to 802.1p values in a network called Network C.
A map group (tosGroup) is created with mapping values.
-> policy map group tos_group 1-4:4 5-7:7
-> policy condition SubnetA source ip 10.10.5.0 mask 255.255.255.0
-> policy condition SubnetB source ip 12.12.2.0 mask 255.255.255.0
-> policy action map_action map tos to 802.1p using tos_group
The map_action specifies that ToS values is mapped to 802.1p with the values specified in tos_group.
With these conditions and action set up, two policy rules can be configured for mapping Subnet A and
Subnet B to the ToS network:
-> policy rule RuleA condition SubnetA action map_action
-> policy rule RuleB condition SubnetB action map_action
page 25-78
"Configuring Trusted Ports" on page
OmniSwitch AOS Release 7 Network Configuration Guide
25-8.
Configuring QoS
"Creating Map
June 2013