ZyXEL Communications 4728F User Manual

 Chapter 26 IP Source Guard

XGS-4526/4528F/4728F User’s Guide

The following table describes the labels in this screen.

Table 79   DHCP Snooping

Database Status

This section displays the current settings for the DHCP snooping 
database. You can configure them in the DHCP Snooping 
Configure screen. See 

.

Agent URL

This field displays the location of the DHCP snooping database.

Write delay timer

This field displays how long (in seconds) the Switch tries to 
complete a specific update in the DHCP snooping database before 
it gives up.

Abort timer

This field displays how long (in seconds) the Switch waits to 
update the DHCP snooping database after the current bindings 
change.
This section displays information about the current update and 
the next update of the DHCP snooping database.

Agent running

This field displays the status of the current update or access of 
the DHCP snooping database.

none: The Switch is not accessing the DHCP snooping database.

read: The Switch is loading dynamic bindings from the DHCP 
snooping database.

write: The Switch is updating the DHCP snooping database.

Delay timer expiry

This field displays how much longer (in seconds) the Switch tries 
to complete the current update before it gives up. It displays Not 
Running if the Switch is not updating the DHCP snooping 
database right now.

Abort timer expiry

This field displays when (in seconds) the Switch is going to update 
the DHCP snooping database again. It displays Not Running if 
the current bindings have not changed since the last update.
This section displays information about the last time the Switch 
updated the DHCP snooping database.

Last succeeded time

This field displays the last time the Switch updated the DHCP 
snooping database successfully.

Last failed time

This field displays the last time the Switch updated the DHCP 
snooping database unsuccessfully.

Last failed reason

This field displays the reason the Switch updated the DHCP 
snooping database unsuccessfully.
This section displays historical information about the number of 
times the Switch successfully or unsuccessfully read or updated 
the DHCP snooping database.

Total attempts

This field displays the number of times the Switch has tried to 
access the DHCP snooping database for any reason.

Startup failures

This field displays the number of times the Switch could not 
create or read the DHCP snooping database when the Switch 
started up or a new URL is configured for the DHCP snooping 
database.