Chapter 7 Route

Table 24 Command Summary: Policy Route (continued)

COMMAND

DESCRIPTION

show policy-route begin policy_number end

Displays the specified range of policy route

policy_number

settings.

 

 

show policy-route override-direct-route

Displays whether or not the NXC forwards

 

packets that match a policy route according to

 

the policy route instead of sending the packets to

 

a directly connected network.

 

 

show policy-route rule_count

Displays the number of policy routes that have

 

been configured on the NXC.

show policy-route underlayer-rules

Displays all policy route rule details for advanced

 

debugging.

show bwm activation

Displays whether or not the global setting for

 

bandwidth management on the NXC is enabled.

show bwm-usage < [policy-route policy_number]

Displays the specified policy route or interface’s

[interface interface_name]

bandwidth allotment, current bandwidth usage,

 

and bandwidth usage statistics.

7.2.1 Assured Forwarding (AF) PHB for DiffServ

Assured Forwarding (AF) behavior is defined in RFC 2597. The AF behavior group defines four AF classes. Inside each class, packets are given a high, medium or low drop precedence. The drop precedence determines the probability that routers in the network will drop packets when congestion occurs. If congestion occurs between classes, the traffic in the higher class (smaller numbered class) is generally given priority. Combining the classes and drop precedence produces the following twelve DSCP encodings from AF11 through AF43. The decimal equivalent is listed in brackets.

Table 25 Assured Forwarding (AF) Behavior Group

 

CLASS 1

CLASS 2

CLASS 3

CLASS 4

Low Drop Precedence

AF11 (10)

AF21 (18)

AF31 (26)

AF41 (34)

 

 

 

 

 

Medium Drop Precedence

AF12 (12)

AF22 (20)

AF32 (28)

AF42 (36)

 

 

 

 

 

High Drop Precedence

AF13 (14)

AF23 (22)

AF33 (30)

AF43 (38)

 

 

 

 

 

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NXC CLI Reference Guide