Network Router User Manual

Chapter 21: QoS Configuration Guide
296 SmartSwitch Router User Reference Manual
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 SSR 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 SSR.
qos priority-map off
Display priority
mapping.
qos show priority-map <name>|all