ZyXEL Communications ISG50 User Manual

 Chapter 12 Interfaces

ISG50 User’s Guide

This screen lists every Ethernet interface and virtual interface created on top of Ethernet interfaces. 
To access this screen, click Configuration > Network > Interface > Ethernet.

Unlike other types of interfaces, you cannot create new Ethernet interfaces nor can you delete any 
of them. If an Ethernet interface does not have any physical ports assigned to it (see 

), the Ethernet interface is effectively removed from the ISG50, but you can still 

configure it.

Ethernet interfaces are similar to other types of interfaces in many ways. They have an IP address, 
subnet mask, and gateway used to make routing decisions. They restrict the amount of bandwidth 
and packet size. They can provide DHCP services, and they can verify the gateway is available.

Use Ethernet interfaces to control which physical ports exchange routing information with other 
routers and how much information is exchanged through each one. The more routing information is 
exchanged, the more efficient the routers should be. However, the routers also generate more 
network traffic, and some routing protocols require a significant amount of configuration and 
management. The ISG50 supports two routing protocols, RIP and OSPF. See 

 for background information about these routing protocols.

Configuration > Network > Interface > Ethernet 

Apply

Click this button to save your changes and apply them to the ISG50.

Reset

Click this button to change the port groups to their current configuration (last-saved 
values).

Configuration > Network > Interface > Port Role (continued)