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Page 15 | AlliedWare™ OS How To Note: DHCP Snooping on Rapier-style switches
Configuration examples
add vlan="48" port=24 frame=tagged uplink
add vlan="48" port=1-23
This is a layer 2 solution. The IP protocol does not need to be configured.
enable dhcpsnooping
enable dhcpsnooping option82
It is also possible to enable DHCP snooping ARP security. If enabled, this will ensure that
ARP packets received on non-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=24 trusted=yes
These ports can receive Option 82 information, and the switch will permit them to send
Option 82.
set dhcpsnooping port=1-23 maxlease=1
set dhcpsnooping port=1 subscriberid="Ground Floor Room 1"
X Add the tagged uplink ports to the VLAN:
X Add the untagged ports for the customers:
X Enable DHCP snooping and Option 82 support:
X Define the DHCP snooping trusted ports:
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: