nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

N7K-2(config)# ip access-list acl-match-telnet
N7K-2(config-acl)# 10 permit tcp 10.100.1.0/24 eq telnet
any
N7K-2(config-acl)# class-map type qos match-all cm-matchtelnet
N7K-2(config-cmap-qos)# match access-group name acl-matchtelnet
N7K-2(config-cmap-qos)# policy-map type qos pm-matchtelnet
N7K-2(config-pmap-qos)# class cm-match-telnet
N7K-2(config-pmap-c-qos)# set cos 5
N7K-2(config-pmap-c-qos)# int e4/1
N7K-2(config-if)# service-policy input pm-match-telnet
N7K-2(config-if)# end
N7K-2# show policy-map interface e4/1 type qos
Global statistics status :
enabled
Ethernet4/1
Service-policy (qos) input: pm-match-telnet
SNMP Policy Index: 285215169
N7K-2#
Class-map (qos): cm-match-telnet (match-all)
Match: access-group acl-match-telnet
set cos 5
The first step creates an access list to define the traffic you want to have the switch take an
action against. Then a class map is created that refers to the access list. Next, the policy map
is created, which refers to the class map and specifies the action to take. In this example, the
goal is to mark the traffic with CoS 5. Finally, the last step applies the policy map to
interface E4/1 for inbound traffic. The policy map can be verified by using the show policymap
command, as shown in Example 10-1.
Note
It is helpful to prepend MQC entries with their function and give them meaningful
names. It helps the network to be “self-documenting” and comes in handy at 3:00 a.m.
when reviewing configurations. In Example 10-1, the access control list (ACL) name
is acl-match-telnet, the class map name is cm-match-telnet, and the policy map
name is pm-match-telnet.