1302
Command Reference for AT-IX5-28GPX High Availability, High Power Video Surveillance PoE Switch
C613-50057-01 REV A
AlliedWare Plus™ Operating System - Version 5.4.5-0.x
DHCP S
NOOPING
C
OMMANDS
IP
DHCP
SNOOPING
DELETE
-
BY
-
LINKDOWN
ip dhcp snooping delete-by-linkdown
Overview
Use this command to set the switch to remove a dynamic entry from the DHCP
snooping database when its port goes down. If the port is part of an aggregated
link, the entries in the database are only deleted if all the ports in the aggregated
link are down.
Use the
no
variant of this command to set the switch not to delete entries when
ports go down.
Syntax
ip dhcp snooping delete-by-linkdown
no ip dhcp snooping delete-by-linkdown
Default
Disabled: by default DHCP Snooping bindings are not deleted when an interface
goes down.
Mode
Global Configuration
Usage
If this command is enabled in a stack, and the master goes down and is replaced
by a new master, entries in the DHCP snooping database for ports on the master
are removed, unless they are part of link aggregators that are still up.
Examples
To set the switch to delete DHCP snooping lease entries from the DHCP snooping
database when links go down, use the commands:
awplus#
configure terminal
awplus(config)#
ip dhcp snooping delete-by-linkdown
To set the switch not to delete DHCP snooping lease entries from the DHCP
snooping database when links go down, use the commands:
awplus#
configure terminal
awplus(config)#
no ip dhcp snooping delete-by-linkdown
Related
Commands
show ip dhcp snooping