Chapter 9 Policy and Static Routes

the following twelve DSCP encodings from AF11 through AF43. The decimal equivalent is listed in brackets.

Table 71 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)

 

 

 

 

 

Maximize Bandwidth Usage

The maximize bandwidth usage option allows the ZyWALL to divide up any available bandwidth on the interface (including unallocated bandwidth and any allocated bandwidth that a policy route is not using) among the policy routes that require more bandwidth.

When you enable maximize bandwidth usage, the ZyWALL first makes sure that each policy route gets up to its bandwidth allotment. Next, the ZyWALL divides up an interface’s available bandwidth (bandwidth that is unbudgeted or unused by the policy routes) depending on how many policy routes require more bandwidth and on their priority levels. When only one policy route requires more bandwidth, the ZyWALL gives the extra bandwidth to that policy route.

When multiple policy routes require more bandwidth, the ZyWALL gives the highest priority policy routes the available bandwidth first (as much as they require, if there is enough available bandwidth), and then to lower priority policy routes if there is still bandwidth available. The ZyWALL distributes the available bandwidth equally among policy routes with the same priority level.

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ZyWALL 110/310/1100 Series User’s Guide