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Using the Net to Media Table
8-2
The display panel (top section) of the Net to Media Table displays address
information for the associated interface. The Values set for section lets you
modify entries in the display panel and make static entries to the ARP cache.
Interface Index
The interface on which this entry’s equivalence is effective, according to the
ipNetToMediaIfIndex. The interface identified by a particular value of this index is
the same interface as identified by the same value of ifIndex.
Physical Address
The physical address, according to the ipNetToMediaPhysAddress. You can edit the
physical address; however, changing a physical address in the Net to Media table
does not change the device’s physical address. It lets you edit the monitored
device’s knowledge of the relationship between a physical and an IP address.
IP Address
IP Address corresponding to the media-‘physical’ address, according to the
ipNetToMediaNetAddress.
Mapping Type
The type of mapping, according to the ipNetToMediaType.
other (1) none of the following.
invalid (2) invalidated mapping; the address is present but the entry cannot
be used.
dynamic (3) address mapping is learned through ARP broadcasts.
static (4) an entry has been manually added to the permanent database.
Setting this object to the value of invalid (2) has the effect of invalidating
the corresponding entry in the ipNetToMediaTable. It effectively disassociates
the interface identified with an entry from the mapping identified with that entry.
It is an implementation-specific matter as to whether the agent removes an
invalidated entry from the table. Management stations must be prepared to
receive tabular information from agents that correspond to entries not currently in
use. Proper interpretation of such entries requires examination of the relevant
ipNetToMediaType object.
Editing the Net to Media Table
You can add new entries to and modify existing entries in the Net to Media Table.
Modifying Entries in the Net To Media Table
1. Click on an entry in the Net To Media Table. That entry’s corresponding values
for its Port Number, Physical Address, IP address, and Mapping Type,
displays in the Values set for area.