Section H-3. arp


H-3. arp

The ARP table maps MAC addresses to IP addresses. In other words, it maps layer two to layer three. Only directly connected devicesi.e., on the local networkappear in this table. The arp command found on Windows and Unix systems allows for the addition and deletion of entries. Here is output from the Windows command:

 C:\> arp -a   Interface: 192.168.1.120 --- 0x10004   Internet Address      Physical Address      Type   192.168.1.3           00-09-5b-51-38-26     dynamic 

Here is output from a Unix system:

 $ /usr/sbin/arp -a kahlua.reflex 192.168.0.6) at 00:30:48:20:92:47 [ether] on eth0 barton.reflex (192.168.0.3) at 00:B0:D0:3D:D4:9A [ether] on eth0 myic (192.168.0.147) at 00:0F:1F:04:71:79 [ether] on eth0 jameson.reflex (192.168.0.1) at 00:60:F5:08:4E:3C [ether] on eth0 $ 

Note that on Unix systems, the format of the output from arp can differ.




Essential SNMP
Essential SNMP, Second Edition
ISBN: 0596008406
EAN: 2147483647
Year: 2003
Pages: 165

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net