Dhcp Relay Agent Commands; Dhcp Relay Check Mac-Address; Dhcp Relay Check Mac-Address Aging-Time - H3C IE4300 Command Reference Manual

<Sysname> system-view
[Sysname] dhcp server ip-pool 0
[Sysname-dhcp-pool-0] vpn-instance abc

DHCP relay agent commands

dhcp relay check mac-address

Use
dhcp relay check mac-address
Use
undo dhcp relay check mac-address
Syntax
dhcp relay check mac-address
undo dhcp relay check mac-address
Default
The MAC address check feature is disabled.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
This feature enables the DHCP relay agent to compare the chaddr field of a received DHCP request
with the source MAC address in the frame header. If they are the same, the DHCP relay agent
forwards the request to the DHCP server. If they are not the same, the DHCP relay agent discards
the request.
The MAC address check feature takes effect only when the
already been configured on the interface.
Enable the MAC address check feature only on the DHCP relay agent directly connected to the
DHCP clients. A DHCP relay agent changes the source MAC address of DHCP packets before
sending them.
Examples
# Enable MAC address check on the DHCP relay agent.
<Sysname> system-view
[Sysname] interface vlan-interface 10
[Sysname-Vlan-interface10] dhcp relay check mac-address
Related commands
dhcp select relay

dhcp relay check mac-address aging-time

Use
dhcp relay check mac-address aging-time
check entries on the DHCP relay agent.
Use
undo dhcp relay check mac-address aging-time
to enable MAC address check on the relay agent.
to disable MAC address check on the relay agent.
dhcp select relay
to set the aging time for MAC address
52
command has
to restore the default.