Configuring Authorized Arp; Example For Configuring Authorized Arp On A Dhcp Server - 3Com MSR 50 Series Configuration Manual

556 C 30: ARP C
HAPTER
Configuring Authorized
ARP
Example for Configuring
Authorized ARP on a
DHCP Server
ONFIGURATION
overwrite static ARP entries, and dynamic ARP entries cannot overwrite authorized
ARP entries. The aging mechanism of authorized ARP entries is independent from
that of dynamic ARP entries.
Enabling authorized ARP
Follow these steps to enable authorized ARP:
To do...
Enter system view
Enter interface view
Enable authorized ARP on the
interface
Configuring the aging time for authorized ARP entries
Follow these steps to configure the aging time for authorized ARP entries:
To do...
Enter system view
Enter interface view
Configure the aging time for
authorized ARP entries
Network requirements
Router A acts as a DHCP server with an IP address pool of 10.1.1.0/24.
■
Router B is a DHCP client which obtains an IP address of 10.1.1.2/24 from the
■
DHCP server.
Network diagram
Figure 157 Network diagram for authorized ARP configuration
DHCP
server
Eth1 /0
10 .1 .1.1/24
Router A
Configuration procedure
1 Configure Router A
# Configure the IP address of Ethernet 1/0.
<RouterA> system-view
[RouterA] interface ethernet 1/0
[RouterA-Ethernet1/0] ip address 10.1.1.1 24
[RouterA-Ethernet1/0] quit
# Configure DHCP.
Use the command...
system-view
interface interface-type
interface-number
arp authorized enable
Use the command...
system-view
interface interface-type
interface-number
arp authorized time-out
seconds
DHCP
client
Eth1/0
Router B
Remarks
-
-
Required
Not enabled by default.
Remarks
-
-
Optional
1200 seconds by default.