ZyXEL Communications 1000 User Manual

 Chapter 16 Routing Protocols

ZyWALL USG 1000 User’s Guide

The Virtual Link Add/Edit screen allows you to create a new virtual link or edit 
an existing one. When the OSPF add or edit screen (see 

Text 
Authentication 
Key

This field is available if the Authentication is Text. Type the password 
for text authentication. The key can consist of alphanumeric characters 
and the underscore, and it can be up to 8 characters long.

MD5 
Authentication 
ID

This field is available if the Authentication is MD5. Type the default ID 
for MD5 authentication in the area. The ID can be between 1 and 255.

MD5 
Authentication 
Key

This field is available if the Authentication is MD5. Type the default 
password for MD5 authentication in the area. The password can consist 
of alphanumeric characters and the underscore, and it can be up to 16 
characters long.

Virtual Link

This section is displayed if the Type is Normal. Create a virtual link if 
you want to connect a different area (that does not have a direct 
connection to the backbone) to the backbone. You should set up the 
virtual link on the ABR that is connected to the other area and on the 
ABR that is connected to the backbone.

Add

Click this to create a new virtual link.

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 an entry, select it and click Remove. The ZyWALL confirms 
you want to remove it before doing so.

#

This field is a sequential value, and it is not associated with a specific 
area.

Peer Router ID

This is the 32-bit ID (in IP address format) of the other ABR in the 
virtual link.

Authentication

This is the authentication method the virtual link uses. This 
authentication protects the integrity, but not the confidentiality, of 
routing updates. 

None uses no authentication.

Text uses a plain text password that is sent over the network (not very 
secure). Hover your cursor over this label to display the password.

MD5 uses an MD5 password and authentication ID (most secure). 
Hover your cursor over this label to display the authentication ID and 
key.

Same as Area has the virtual link also use the Authentication 
settings above.

OK

Click OK to save your changes back to the ZyWALL.

Cancel

Click Cancel to exit this screen without saving.

Table 90   Configuration > Network > Routing > OSPF > Add (continued)