User's Manual

SPEEDLAN 9200 User Guide Part # 34357-MNL Rev.03
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ARP Table
ARP is the abbreviation for Address Resolution Protocol, which maps an IP address to a
machine's hardware address. Network administrators use ARP to locate systems on the
LAN that are configured with incorrect IP addresses. This helps diagnose MAC
addresses that your router knows about.
To open the ARP table, choose ARP Table from the Diagnostics menu. The following
page will appear.
Figure 3-50: ARP page
The ARP statistics are defined below:
• IP address: The IP address corresponding to the media-dependent 'physical'
MAC address.
• HW Address: In a LAN environment each computer contains its own Medium
Access Control (MAC) address which is the embedded and unique hardware
number.
• Interface: The interface on which this entry is effective.
ICMP Statistics
ICMP is the abbreviation for Internet Control Message Protocol. ICMP supplies
messages and error reports for packets that travel between host servers and gateways.
The ICMP stats can be used to diagnose a connectivity problem. If you are trying to
ping a router and you're not getting a response, you can check the "InMsgs" to see if the
ping arrived at the router and just could not get back. This might indicate that the
router has no route back to the originator.