ZyXEL Communications 4728F User Manual

 Chapter 37 OSPF

XGS-4526/4528F/4728F User’s Guide

To ensure that the Switch receives only routing information from a trusted layer-3 
devices, activate authentication. The OSPF supports three levels of authentication: 

• None – no authentication is used.
• Simple – authenticate link state updates using an 8 printable ASCII character 

password. 

• MD5 – authenticate link state updates using a 16 printable ASCII character 

password. 

Distance

Enter a number from 10 to 255 to specify the administrative distance that is 
assigned to routes learned by OSPF. 

The lower the administrative distance value is, the more preferable the 
routing protocol is. See 

 for more information 

about administrative distance.

Note: You cannot set two routing protocols to have the same 

administrative distance.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The 
Switch loses these changes if it is turned off or loses power, so use the Save 
link on the top navigation panel to save your changes to the non-volatile 
memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Table 117   IP Application > OSPF Configuration: Activating and General Settings