ZyXEL Communications ZyWall USG 50-H Series, User Manual

Page: 236 / 704

Chapter 10 Policy and Static Routes
ZyWALL USG 50-H User’s Guide
236
using the same port triggering rule as computer A unless they are using a different next
hop (gateway, outgoing interface, VPN tunnel or trunk) from computer A or until the
connection is closed or times out.
Figure 176 Trigger Port Forwarding Example
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.