Alcatel OmniSwitch 6624 Troubleshooting Manual page 169

Troubleshooting ARP
When device A ARPs for the gateway IP address exist on the switch, an associated ARP cache entry is
created by the switch. This entry can be viewed by using the show arp command.
To search for a specific ARP entry, use the following command syntax:
show arp ip-address
For example:
-> show arp 10.255.11.219
Total 39 arp entries
Flags (P=Proxy, A=Authentication, V=VRRP)
IP Addr
-----------------+-------------------+----------+-------+--------+-----------
10.10.42.159
To search for an ARP entry associated with a MAC address use the following command syntax:
show arp mac-address
For example:
-> show arp 10.255.11.219
Total 39 arp entries
Flags (P=Proxy, A=Authentication, V=VRRP)
IP Addr
-----------------+-------------------+----------+-------+--------+-----------
10.10.42.159
This confirms that the switch has learned the ARP entry of the device A.
Now, device A should have also resolved the ARP entry to the gateway IP address. It can be verified on
the workstation's command prompt using the following DoS command:
C:\> arp -a
Interface: 10.10.42.1 on Interface 0x1000003
Internet Address
10.10.42.1
OmniSwitch Troubleshooting Guide
Hardware Addr
08:00:20:a8:f0:8a DYNAMIC
Hardware Addr
08:00:20:a8:f0:8a DYNAMIC
Physical Address
00-d0-95-79-62-d1
September 2005
Type Flags Port
16/ 2
Type Flags Port
16/ 2
Type
dynamic
ARP Protocol Failure
Interface
vlan 10
Interface
vlan 10
page 11-3