ZyXEL Communications ISG50 User Manual

 Chapter 13 Trunks

ISG50 User’s Guide

Click Configuration > Network > Interface > Trunk and then the Add (or Edit) icon to open 
the Trunk Edit screen. Use this screen to create or edit a WAN trunk entry.

Configuration > Network > Interface > Trunk > Add (or Edit)   

  

Each field is described in the table below. 

Configuration > Network > Interface > Trunk > Add (or Edit)

Name

This is read-only if you are editing an existing trunk. When adding a new trunk, 
enter a descriptive name for this trunk. You may use 1-31 alphanumeric 
characters, underscores(

_

), or dashes (-), but the first character cannot be a 

number. This value is case-sensitive.

Load Balancing 
Algorithm

Select a load balancing method to use from the drop-down list box. 

Select Weighted Round Robin to balance the traffic load between interfaces 
based on their respective weights. Weighted round robin is activated only when 
the first group member interface has more traffic than it can handle.

Select Least Load First to send new session traffic through the least utilized 
trunk member.

Select Spillover to send network traffic through the first interface in the group 
member list until there is enough traffic that the second interface needs to be used 
(and so on).

Load Balancing 
Index(es)

This field is available if you selected to use the Least Load First or Spillover 
method.

Select Outbound, Inbound, or Outbound + Inbound to set the traffic to which 
the ISG50 applies the load balancing method. Outbound means the traffic 
traveling from an internal interface (ex. LAN) to an external interface (ex. WAN). 
Inbound means the opposite.

The table lists the trunk’s member interfaces. You can add, edit, remove, or move 
entries for user configured trunks.

Add

Click this to add a member interface to the trunk. Select an interface and click Add 
to add a new member interface after the selected member interface.

Edit

Double-click an entry or select it and click Edit to open a screen where you can 
modify the entry’s settings. 

Remove

To remove a member interface, select it and click Remove. The ISG50 confirms 
you want to remove it before doing so.