ZyXEL Communications GS1920v2 Series User Manual page 394

Table 220 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Status (continued)
LABEL DESCRIPTION
Last Failed This field displays the reason the Switch updated the DHCP snooping database
Reason
unsuccessfully.
Counters
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.
Successful This field displays the number of times the Switch read bindings from or updated the bindings
Transfers
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 This field displays the first time the Switch accessed the DHCP snooping database for any
Access
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 This field displays the number of bindings the Switch ignored because the VLAN ID does not
VLANs
exist anymore.
Last Ignored This field displays the last time the Switch ignored any bindings for any reason from the DHCP
Time
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.
Chapter 63 DHCP Snooping
GS1920v2 Series User's Guide
394