Allied Telesis Rapier i Series - Manual (Page 18)

Page 18 | AlliedWare™ OS How To Note: DHCP Snooping on Rapier-style switches
Configuration examples
enable ip
add ip int=vlan48 ip=10.11.67.254 mask=255.255.255.0
add ip int=vlan50 ip=10.50.1.254 mask=255.255.255.0
add ip rou=0.0.0.0 mask=0.0.0.0 int=vlan50 next=10.50.1.1
enable bootp relay
add bootp relay=10.50.1.100
Here the DHCP server is set to 10.50.1.100.
enable dhcpsnooping
enable dhcpsnooping option82
Note: It is also possible to enable DHCP snooping ARP security. If enabled this will ensure
that ARP packets received on un-trusted ports are only permitted if they originate
from an IP address that has been allocated and snooped by DHCP (enable
dhcpsnooping arpsecurity).
set dhcpsnooping port=25 trusted=yes
This port is open for generating and receiving Option 82 information. By default, the other
ports are non-trusted.
set dhcpsnooping port=1-24 maxlease=1
set dhcpsnooping port=1 subscriberid="Ground Floor Room 1"
X Configure the switch’s IP
:
X For layer 3 support, enable the BOOTP Relay:
X
Enable DHCP snooping and Option 82 support:
X Define the DHCP snooping trusted port:
X Define the maximum number of DHCP leasees permitted on each port:
X Define the string that will be used in the subscriber-ID suboption portion of
the Option 82 inserted into DHCP packets: