EMC Connectrix ED-64M, Руководство пользователя

Страница: 229 / 476

A
MIB-II Support
A-13
Using SNMP to Manage the Switch
The Address
Translation
Group/Table Implementation of the Address Translation group is mandatory for
all systems. Note however that this group is deprecated by MIB-II.
That is, it is being included solely for compatibility with MIB-I nodes,
and will most likely be excluded from MIB-III nodes. From MIB-II
and onwards, each network protocol group contains its own address
translation tables.
The Address Translation group contains one table which is the union
across all interfaces of the translation tables for converting a
NetworkAddress (for example, an IP address) into a
subnetwork-specific address. For lack of a better term, this document
refers to such a subnetwork-specific address as a "physical" address.
Examples of such translation tables are: for broadcast media where
ARP is in use, the translation table is equivalent to the ARP cache; or,
on an X.25 network where non-algorithmic translation to X.121
addresses is required, the translation table contains the
NetworkAddress to X.121 address equivalences.
Table A-4
Address Translation Table
MIB-2 Object
Name
Type Access Description
atIfIndex INTEGER R/W The interface on which this entry's equivalence is effective. The interface
identified by a particular value of this index is the same interface as identified by
the same value of ifIndex
atPhysAddress PhysAddress R/W The media-dependent physical address. Setting this object to a null string (one of
zero length) has the effect of invaliding the corresponding entry in the atTable
object.that is, it effectively disassociates the interface identified with said entry
from the mapping identified with said entry. It is an implementation-specific matter
as to whether the agent removes an invalidated entry from the table. Accordingly,
management stations must be prepared to receive tabular information from
agents that corresponds to entries not currently in use. Proper interpretation of
such entries requires examination of the relevant atPhysAddress object.
atNetAddress NetworkAddress R/W The NetworkAddress (for example, the IP address) corresponding to the
media-dependent physical address.