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Unformatted text preview: ., IP) contains its own address translation tables. For
IP it is the ipNetToMediaTable.
Only a single table with three columns is defined for the at group, shown in Figure 25.19.
We can use a new command within the snmpi program to dump an entire table. We'll query the
router named kinetics (which routes between a TCP/IP network and an AppleTalk network) for
its entire ARP cache. This output reiterates the lexicographic ordering of the entries in the table:
Address translation table, index = < atIflndex >.1.< atNetAddress >
INTEGER atPhysAddress PhysAddress
atNetAddress NetworkAddress R/W Description * Interface number: ifIndex. * Physical address. Setting this to a string of 0
length invalidates the entry. * IP address. Figure 25.19 Address translation table: atTable.
sun % snmpi -a kinetics -c secret dump at
If we watch the packet exchange using tcpdump, when snmpi dumps an entire table it first issues
a get-next for the table name (at in this example) to get the first entry. It prints the first entry
and issues another get-next. This continues until the entire table has been dumped.
Figure 25.20 shows the arrangement of this table. file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/snmp_sim.htm (17 of 33) [12/09/2001 14.47.40] Chapter 25. SNMP: Simple Network Management Protocol atPhysAddress atNetAddress 1 0xaa:00:04:00:f4:14 184.108.40.206 1 0x08:...
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- Spring '12