Specifications

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Catalyst 2970 Switch Software Configuration Guide
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Chapter 27 Configuring QoS
Configuring Standard QoS
To delete an existing policy map, use the no policy-map policy-map-name global configuration
command. To delete an existing class map, use the no class class-map-name policy-map configuration
command. To return to the untrusted state, use the no trust policy-map configuration command. To
remove an assigned DSCP or IP precedence value, use the no set {ip dscp new-dscp | ip precedence
new-precedence} policy-map configuration command. To remove an existing policer, use the no police
rate-bps burst-byte [exceed-action {drop | policed-dscp-transmit}] policy-map configuration
command. To remove the policy map and interface association, use the no service-policy input
policy-map-name interface configuration command.
This example shows how to create a policy map and attach it to an ingress interface. In the configuration,
the IP standard ACL permits traffic from network 10.1.0.0. For traffic matching this classification, the
DSCP value in the incoming packet is trusted. If the matched traffic exceeds an average traffic rate
of 48000 bps and a normal burst size of 8000 bytes, its DSCP is marked down (based on the
policed-DSCP map) and sent:
Switch(config)# access-list 1 permit 10.1.0.0 0.0.255.255
Switch(config)# class-map ipclass1
Switch(config-cmap)# match access-group 1
Switch(config-cmap)# exit
Switch(config)# policy-map flow1t
Switch(config-pmap)# class ipclass1
Switch(config-pmap-c)# trust dscp
Switch(config-pmap-c)# police 48000 8000 exceed-action policed-dscp-transmit
Switch(config-pmap-c)# exit
Switch(config-pmap)# exit
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# service-policy input flow1t
This example shows how to create a Layer 2 MAC ACL with two permit statements and attach it to an
ingress interface. The first permit statement allows traffic from the host with MAC
address 0001.0000.0001 destined for the host with MAC address 0002.0000.0001. The second permit
statement allows only Ethertype XNS-IDP traffic from the host with MAC address 0001.0000.0002
destined for the host with MAC address 0002.0000.0002.
Switch(config)# mac access-list extended maclist1
Switch(config-ext-mac)# permit 0001.0000.0001 0.0.0 0002.0000.0001 0.0.0
Switch(config-ext-mac)# permit 0001.0000.0002 0.0.0 0002.0000.0002 0.0.0 xns-idp
Switch(config-ext-mac)# exit
Switch(config)# mac access-list extended maclist2
Switch(config-ext-mac)# permit 0001.0000.0003 0.0.0 0002.0000.0003 0.0.0
Switch(config-ext-mac)# permit 0001.0000.0004 0.0.0 0002.0000.0004 0.0.0 aarp
Step 8
exit Return to policy map configuration mode.
Step 9
exit Return to global configuration mode.
Step 10
interface interface-id Enter interface configuration mode, and specify the interface to attach
to the policy map.
Valid interfaces include physical interfaces.
Step 11
service-policy input policy-map-name Specify the policy-map name, and apply it to an ingress interface.
Only one policy map per ingress interface is supported.
Step 12
end Return to privileged EXEC mode.
Step 13
show policy-map [policy-map-name [class
class-map-name]]
Verify your entries.
Step 14
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose