
Chapter 8 Route
ZyWALL (ZLD) CLI Reference Guide
93
8.2.1 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.
show policy-route override-direct-route Displays whether or not the ZyWALL 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 ZyWALL.
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 ZyWALL is
enabled.
show bwm-usage < [policy-route policy_number] |
[interface interface_name]
Displays the specified policy route or interface’s
bandwidth allotment, current bandwidth usage,
and bandwidth usage statistics.
Table 42 Command Summary: Policy Route (continued)
COMMAND DESCRIPTION
Table 43 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)
Kommentare zu diesen Handbüchern