ZyXEL Communications UAG Series - 8.4 Virtual Interface Specific Commands

Chapter 8 Route
UAG CLI Reference Guide
84
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.
8.2.2 Policy Route Command Example
The following commands create two address objects (TW_SUBNET and GW_1) and insert a policy
that routes the packets (with the source IP address TW_SUBNET and any destination IP address)
[no] policy controll-virtual-server-rules
activate
Gives policy routes priority over NAT virtual server rules (1-1 SNAT).
Use the no command to give NAT virtual server rules priority over
policy routes.
show bwm activation Displays whether or not the global setting for bandwidth management
on the UAG 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.
show policy-route [policy_number] Displays all or specified policy route settings.
show policy-route begin <1..200> end
<1..200>
Displays the specified range of policy route settings.
show policy-route controll-ipsec-dynamic-
rules
Displays whether the UAG checks policy routes first before IPSec
dynamic rules.
show policy-route override-direct-route Displays whether or not the UAG 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 controll-virtual-server-
rules
Displays whether or not policy routes have priority over NAT virtual
server rules (1-1 SNAT).
show policy-route rule_count Displays the number of policy routes that have been configured on the
UAG.
show policy-route underlayer-rules Displays all policy route rule details for advanced debugging.
Table 34 Command Summary: Policy Route (continued)
COMMAND DESCRIPTION
Table 35 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)