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Traffic Prioritization for Layer-3 & Layer-4 Flows

316 Enterasys Xpedition User Reference Manual

The ability to specify per-port priority maps is enabled on the XP by default. You can

disable use of per-port priority maps on the XP; all ports on the XP will then be configured

to use the default priority map only. If the commands to create and apply priority maps

exist in the active configuration, they will remain in the configuration but be ineffective.

To disable the use of priority maps, enter the following command in Configure mode:

If the above command is negated, ports on the XP can use per-port priority maps. If the

commands to create and apply priority maps exist in the active configuration, they are

reapplied.

Displaying Priority Map Information

To display priority maps and the ports on which they are applied, enter the following

command in Enable mode:

Traffic Prioritization for Layer-3 & Layer-4 Flows

QoS policies applied at layer-3 and 4 allow you to assign priorities based on specific fields

in the IP and IPX headers. You can set QoS policies for IP flows based on source IP

address, destination IP address, source TCP/UDP port, destination TCP/UDP port, type

of service (TOS) and transport protocol (TCP or UCP). You can set QoS policies for IPX

flows based on source network, source node, destination network, destination node,

source port and destination port. A QoS policy set on an IP or IPX flow allows you to

classify the priority of traffic based on:

• Layer-3 source-destination flows

• Layer-4 source-destination flows

• Layer-4 application flows

Configuring IP QoS Policies

To configure an IP QoS policy, perform the following tasks:

1. Identify the Layer-3 or 4 flow and set the IP QoS policy.

2. Specify the precedence for the fields within an IP flow.

Disable use of per-

port priority maps on

the XP.

qos priority-map off

Display priority

mapping.

qos show priority-map <name>|all

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Cabletron Systems SSIM-R8-02 Spécifications Page 336