ZyXEL Communications 4728F User Manual

Chapter 26 IP Source Guard

XGS-4526/4528F/4728F User’s Guide

Successful transfers

This field displays the number of times the Switch read bindings 
from or updated the bindings in the DHCP snooping database 
successfully.

Failed transfers

This field displays the number of times the Switch was unable to 
read bindings from or update the bindings in the DHCP snooping 
database.

Successful reads

This field displays the number of times the Switch read bindings 
from the DHCP snooping database successfully.

Failed reads

This field displays the number of times the Switch was unable to 
read bindings from the DHCP snooping database.

Successful writes

This field displays the number of times the Switch updated the 
bindings in the DHCP snooping database successfully.

Failed writes

This field displays the number of times the Switch was unable to 
update the bindings in the DHCP snooping database.

Database detail
First successful 
access

This field displays the first time the Switch accessed the DHCP 
snooping database for any reason.

Last ignored bindings 
counters

This section displays the number of times and the reasons the 
Switch ignored bindings the last time it read bindings from the 
DHCP binding database. You can clear these counters by 
restarting the Switch or using CLI commands. See the Ethernet 
Switch CLI Reference Guide.

Binding collisions

This field displays the number of bindings the Switch ignored 
because the Switch already had a binding with the same MAC 
address and VLAN ID.

Invalid interfaces

This field displays the number of bindings the Switch ignored 
because the port number was a trusted interface or does not exist 
anymore.

Parse failures

This field displays the number of bindings the Switch ignored 
because the Switch was unable to understand the binding in the 
DHCP binding database.

Expired leases

This field displays the number of bindings the Switch ignored 
because the lease time had already expired.

Unsupported vlans

This field displays the number of bindings the Switch ignored 
because the VLAN ID does not exist anymore.

Last ignored time

This field displays the last time the Switch ignored any bindings 
for any reason from the DHCP binding database.

Total ignored bindings 
counters

This section displays the reasons the Switch has ignored bindings 
any time it read bindings from the DHCP binding database. You 
can clear these counters by restarting the Switch or using CLI 
commands. See the Ethernet Switch CLI Reference Guide.

Binding collisions

This field displays the number of bindings the Switch has ignored 
because the Switch already had a binding with the same MAC 
address and VLAN ID.

Invalid interfaces

This field displays the number of bindings the Switch has ignored 
because the port number was a trusted interface or does not exist 
anymore.

Table 79   DHCP Snooping (continued)