Policy Based Routing - Alcatel-Lucent OmniSwitch 6800 Series Network Configuration Manual

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Policy Applications

In the next example, the policy map group command specifies a group of values that should be mapped;

the policy action map command specifies what should be mapped (802.1p to 802.1p, ToS/DSCP to

802.1p) and the mapping group that should be used. For more details about creating map groups, see

"Creating Map Groups" on page

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 will be 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

Policy Based Routing

Policy Based Routing (PBR) allows a network administrator to define QoS policies that will override the

normal routing mechanism for traffic matching the policy condition. This feature is only supported on the

OmniSwitch 9000 and 6850 switches; it is not available on the OmniSwitch 6800 switch.

Note. When a PBR QoS rule is applied to the configuration, it is applied to the entire switch, unless you

specify a built-in port group in the policy condition.

Policy Based Routing may be used to redirect traffic to a particular gateway based on source or destina-

tion IP address, source or destination network group, source or destination TCP/UDP port, a service or

service group, IP protocol, or built-in source port group.

Traffic may be redirected to a particular gateway regardless of what routes are listed in the routing table.

Note that the gateway address does not have to be on a directly connected VLAN; the address may be on

any network that is learned by the switch.

Mapping Application

OmniSwitch 6800/6850/9000 Network Configuration Guide

Configuring QoS