Install guide

14 DHCP Snooping Release Note
Software Version 2.7.6
C613-10462-00 REV A
Command Reference Updates
This section describes any new commands and the changed portions of any
modified commands and output screens. It uses boldface to highlight new
parameters and options of existing commands, and new fields of existing
output.
add dhcpsnooping binding
Syntax ADD DHCPSnooping BINDing=macaddr INTerface=vlan IP=ipadd
POrt=port-number
Description This command adds a static entry to the DHCP snooping binding database.
This is typically used to add a DHCP snooping entry for a client that has a
preconfigured IP address on an untrusted port. The DHCP snooping entry you
define must not already exist.
The switch does not check static entries for expiry. You must manually delete
out-of-date static entries using the delete dhcpsnooping binding command on
page 16.
For more information about the binding database, see “The DHCP snooping
binding database” on page 9
Example To add a static DHCP snooping entry for a client with MAC address
00-00-cd-00-11-56, IP address 192.168.12.101, on port 6 of VLAN101, use the
command:
add dhcps bind=00-00-cd-00-11-56 int=vlan101
ip=192.168.12.101 po=6
Parameter Description
BINDing The MAC address of the client. The macaddr is an Ethernet six-octet
MAC address expressed as six pairs of hexadecimal digits delimited by
hyphens.
INTerface The VLAN interface that the client is attached to. The vlan is a physical
VLAN interface such as vlan46 or vlan122.
IP The IP address of the client in dotted decimal notation.
POrt The switch port number that the client is attached to. Port numbers
start at 1 and end at m, where m is the highest numbered Ethernet
switch port, including uplink ports.
For AT-8900 and AT-9900 switches only, the specified port must also
have a QoS policy with a DHCP snooping classifier. For more
information, see DHCP Filtering on page 11.