ZyXEL Communications 1000 Manual De Usuario

 Chapter 15 Policy and Static Routes

ZyWALL USG 1000 User’s Guide

Here is more detailed information about some of the features you can configure in 
policy routing.

NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP 
address in a packet in one network to a different IP address in another network. 
Use SNAT (Source NAT) to change the source IP address in one network to a 
different IP address in another network.

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 

Gateway IP 

Select the radio button and enter the IP address of the next-hop 
gateway. The gateway is a router or switch on the same segment as your 
ZyWALL's interface(s). The gateway helps forward packets to their 
destinations.

Interface

Select the radio button and a predefined interface through which the 
traffic is sent.

Metric

Metric represents the “cost” of transmission for routing purposes. IP 
routing uses hop count as the measurement of cost, with a minimum of 1 
for directly connected networks. Enter a number that approximates the 
cost for this link. The number need not be precise, but it must be 0~127. 
In practice, 2 or 3 is usually a good number. 

OK

Click OK to save your changes back to the ZyWALL.

Cancel

Click Cancel to exit this screen without saving.

Table 84   Configuration > Network > Routing > Static Route > Add (continued)