Cisco IE 4000, Software Configuration Manual

Page: 587 / 1066

583
Configuring QoS
Understanding QoS
Switch(config-pmap)#
class customer-1-vlan
Switch(config-pmap-c)# service-policy ingress-policy-1
Switch(config-pmap-c)# exit
Switch(config)# interface fastethernet0/1
Switch(config-if)# switchport mode trunk
Switch(config-if)#
service-policy input customer-1-ingress
Switch(config-pmap-c)# exit
Note: Each per-port, per-VLAN parent policy class, except class-default , can have a child policy association.
see Configuring Per-Port Per-VLAN QoS with Hierarchical Input Policy Maps, page 623 for configuration information,
including configuration guidelines and limitations.
Table Maps
You can use table maps to manage a large number of traffic flows with a single command. You can specify table maps
in
set commands and use them as mark-down mapping for the policers. You can also use table maps to map an incoming
QoS marking to a replacement marking without having to configure a large number of explicit matches and sets. Table
maps are used only in input policy maps.
Table maps can be used to:

Correlate specific CoS, DSCP, or IP precedence values to specific CoS, DSCP, or IP precedence values

Mark down a CoS, DSCP, or IP precedence value

Assign defaults for unmapped values
A table map includes one of these default actions:

default default-value —applies a specific default value (0 to 63) for all unmapped values

default copy —maps all unmapped values to the equivalent value in another qualifier

default ignore —makes no changes for unmapped values
This example creates a table to map specific CoS values to DSCP values. The default command maps all unmapped
CoS values to a DSCP value of 63.
Switch(config)# table-map cos-dscp-tablemap
Switch(config-tablemap)# map from 5 to 46
Switch(config-tablemap)# map from 6 to 56
Switch(config-tablemap)# map from 7 to 57
Switch(config-tablemap)# default 63
Switch(config-tablemap)# exit
The switch supports a maximum of 256 unique table maps. You can enter up to 64 different map from – to entries in a
table map. These table maps are supported on the switch:

DSCP to CoS

DSCP to precedence

DSCP to DSCP

CoS to DSCP

CoS to precedence

CoS to CoS