qos-map

Description

The Silver Peak appliance allows you to configure the Quality of Service (QoS) for your traffic by creating QoS maps. QoS maps make it easy for you to explicitly match the traffic that you want to queue, and then (1) send that traffic to a particular queue, and (2) specify the DSCP markings for WAN and LAN packets.

You can create elaborate combinations of match criteria, using IP addresses, ports, protocol, and/or DSCP markings. You can also create more complex matches within ACLs. Or, you can choose to simplify your match criteria by using well-known or user-defined applications, or application groups. By default, one QoS map is always active, and you can change the active map at any time, simply by activating a different map.

Each QoS map may have multiple entries. A map entry consists of one or more match statements, which specifies packet fields to be matched, and one set statement, which specifies the traffic class, or queue, for the traffic. You can also specify DSCP markings for the LAN (inner) and WAN (outer, or tunnel) packets.

For example, in the following example, the first statement matches all traffic that is associated with the application, AOL. The second statement specifies a traffic class ID of 9 for that traffic:

(conf) # qos-map fred 50 match app aol

(conf) # qos-map fred 50 set traffic-class 9

 

You create a new QoS map with a single, default entry which serves as a catch-all. In this example, if the QoS map, fred, did not exist, the CLI would create it when you entered the match statement.

Entries in a map are ordered according to their assigned priorities. Priorities are used to identify, as well as to order entries within a map. All priority values must be unique (in other words, no two entries in a given map can have the same priority value). In the above example, the priority for the entries is 50.

If you enter a new priority statement for an existing QoS map, the CLI adds that entry to the QoS map. However, if you enter a statement that has the same priority as one that already exists, the new entry overwrites the previous one (and the CLI does not provide a warning).

A QoS map entry can match traffic that satisfies either a pre-defined ACL or any of the following attributes:

n	IP Protocol

n	Source IP Address

n	Destination IP Address

n	Source Port Number

n	Destination Port Number

n	Application

n	DSCP value

n

VLAN

See Also

See the following related commands:

n	“qos-map match”

n	“qos-map set”

n	“qos-map activate”

n	“no qos-map”

n	“qos-map modify-priority”

n	“show qos-map”

 

To edit the ten available traffic classes, use the shaper command.

Please send comments or suggestions regarding user documentation to techpubs@silver-peak.com.