A

4 – MIB-II Objects

ifSpecific (1.3.6.1.2.1.2.2.1.22)

A reference to MIB definitions specific to the particular media being used to realize the interface. For example, if the interface is realized by an Ethernet, then the value of this object refers to a document that defines objects specific to Ethernet. If this information is not present, its value should be set to the OBJECT IDENTI- FIER { 0 0 }, which is a syntactically valid object identifier, and any conformant implementation of ASN.1 (Abstract Syntax Notation) and BER must be able to generate and recognize this value.

Syntax

OBJECT IDENTIFIER

Access

read-only

Status

mandatory

4.5

The Address Translation Group

Implementation of the Address Translation group is mandatory for all systems. However, 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.

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Q-Logic SANBOX2 manual IfSpecific, Address Translation Group