Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 1449)

DHCP Snooping Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 56.11
ip dhcp snooping agent-option allow-untrusted
Use this command to enable DHCP Relay Agent Option 82 information reception on
untrusted ports. When this is enabled, the switch accepts incoming DHCP packets that
contain DHCP Relay Agent Option 82 information on untrusted ports.
Use the no variant of this command to disable DHCP Relay Agent Option 82 information
reception on untrusted ports.
Syntax ip dhcp snooping agent-option allow-untrusted
no ip dhcp snooping agent-option allow-untrusted
Default Disabled
Mode Global Configuration
Usage If the switch is connected via untrusted ports to edge switches that insert DHCP Relay
Agent Option 82 information into DHCP packets, you may need to allow these DHCP
packets through the untrusted ports, by using this command.
When this is disabled (default), the switch treats incoming DHCP packets on untrusted
ports that contain DHCP Relay Agent Option 82 information as DHCP snooping violations:
it drops them and applies any violation action specified by the
ip dhcp snooping
violation command on page 56.22 . The switch stores statistics for packets dropped; to
display these statistics, use the show ip dhcp snooping statistics command on page
56.38 .
Example To enable DHCP snooping Option 82 information reception on untrusted ports, use the
commands:
Related Commands ip dhcp snooping agent-option
ip dhcp snooping violation
show ip dhcp snooping
show ip dhcp snooping statistics
awplus# configure terminal
awplus(config)# ip dhcp snooping agent-option allow-untrusted