69.233.229 - 0000.0c59.f892 ARPA Ethernet0/0
Internet 172.69.233.218 - 0000.0c07.ac00 ARPA Ethernet0/0
Internet 172.69.233.19 - 0000.0c63.1300 ARPA Ethernet0/0
Internet 172.69.233.309 - 0000.0c36.6965 ARPA Ethernet0/0
Internet 172.19.168.11 - 0000.0c63.1300 ARPA Ethernet0/0
Internet 172.19.168.254 9 0000.0c36.6965 ARPA Ethernet0/0
Table 4-8 show ip arp Command Output Fields
Field Description
Protocol Protocol for network address in the Address ?¬?eld.
Address The network address that corresponds to the Hardware Address.
Age (min) Age in minutes of the cache entry. A hyphen (-) means that the address is
local.
Hardware Addr LAN hardware address of a MAC address that corresponds to the
network address.
continues
304 Chapter 4: LAN Connections
Using Common Cisco IOS Tools
The Cisco IOS Software has many common IP tools to be used for troubleshooting and
veri?¬?cation of network connectivity. The most common tools used are ping and traceroute.
To diagnose basic network connectivity, you can use the ping command in user EXEC or
privileged EXEC mode. The ping command sends out an ICMP echo request to an end
station to verify reachability. The command structure is as follows:
ping [protocol {host-name | system-address}]
The command syntax is described in Table 4-9.
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