3com 2200 User Manual
Setting Up an IP Interface for Management
3-11
Administering
the ARP Cache
The Switch 2200 uses the Address Resolution Protocol (ARP) to find the
MAC addresses corresponding to the IP addresses of hosts and routers on
the same subnets. An ARP cache is a table of known IP addresses and their
corresponding MAC addresses.
MAC addresses corresponding to the IP addresses of hosts and routers on
the same subnets. An ARP cache is a table of known IP addresses and their
corresponding MAC addresses.
Displaying the ARP Cache
To display the contents of the ARP cache, enter the following command
from the top level of the Administration Console:
from the top level of the Administration Console:
ip arp display
The contents of the ARP cache are displayed as shown in this example:
RIP is active.
IP Address
MAC Address
Interface
158.101.1.112
08-00-1e-31-a6-2
1
158.101.1.117
08-00-1e-65-21-07
1
Removing an ARP Cache Entry
You might want to remove an entry from the ARP cache if the MAC address
has changed.
has changed.
To remove an entry from the ARP cache:
1 From the top level of the Administration Console, enter:
ip arp remove
2 Enter the IP address you want to remove.
The address is immediately removed from the table. If necessary, the system
will subsequently use ARP to find the new MAC address corresponding to
that IP address.
will subsequently use ARP to find the new MAC address corresponding to
that IP address.
Top-Level Menu
system
ethernet
fddi
bridge
ethernet
fddi
bridge
➧
ip
snmp
analyzer
script
logout
snmp
analyzer
script
logout
interface
route
route
➧
arp
rip
ping
statistics
rip
ping
statistics
➧
display
remove
flush
remove
flush
Top-Level Menu
system
ethernet
fddi
bridge
ethernet
fddi
bridge
➧
ip
snmp
analyzer
script
logout
snmp
analyzer
script
logout
interface
route
route
➧
arp
rip
ping
statistics
rip
ping
statistics
display
➧
remove
flush
flush