Users Guide

Address resolution protocol
ARP runs over Ethernet and enables end stations to learn the MAC addresses of neighbors on an IP network. Using ARP, OS10
automatically updates the ARP cache table which maps the MAC addresses to their corresponding IP addresses. The ARP cache enables
dynamically learned addresses to be removed after a congured period.
Congure static ARP entries
You can manually congure static entries in the ARP mapping table. Dynamic ARP is vulnerable to spoong. To avoid spoong, congure
static entries. Static entries take precedence over dynamic ARP entries.
1 Congure an IP address and MAC address mapping for an interface in INTERFACE mode.
ip arp ip-address mac address
• ip-address—IP address in dotted decimal format—A.B.C.D.
• mac address—MAC address in nnnn.nnnn.nnnn format
These entries do not age, and you can only remove them manually. To remove a static ARP entry, use the no arp ip-address
command.
Congure static ARP entries
OS10(config)# interface ethernet 1/1/6
OS10(conf-if-eth1/1/6)# ip arp 10.1.1.5 08:00:20:b7:bd:32
View ARP entries
OS10# show ip arp interface ethernet 1/1/6
!
interface ethernet1/1/6
ip arp 10.1.1.5 08:00:20:b7:bd:32
no shutdown
!
IPv4 routing commands
clear ip route
Clears the specied routes from the IP routing table.
Syntax
clear ip route {* | A.B.C.D/mask}
Parameters
• *—Specify to clear the entire IP routing table. This option refreshes all the routes in the routing table and the
trac ow is aected for all the routes in the switch.
• A.B.C.D/mask —Specify the IP route to be removed from the IP routing table. This option refreshes all the
routes in the routing table, but the trac ow is aected only for the specied route in the switch.
Default Not congured
Command Mode EXEC
Usage Information This command does not remove the static routes from the routing table.
246 Layer 3