HP 8/20q HP StorageWorks 8/20q and SN6000 Fibre Channel Switch Simple Network - Page 31

The Address Translation group

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Status Mandatory 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 IDENTIFIER { 0 0 }, which is a syntactically valid object identifier, and any conformant implementation of ASN.1 (Abstract Syntax Notation) and Bit Error Rate (BER) must be able to generate and recognize this value. Syntax OBJECT IDENTIFIER Access Read-only Status Mandatory 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 included solely for compatibility with MIB-I nodes, and is most likely to be excluded from MIB-III nodes. From MIB-II and higher nodes, 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 when translations tables might be used include broadcast media where Address Resolution Protocol (ARP) is in use and the translation table is equivalent; 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. atIfIndex (1.3.6.1.2.1.3.1.1.1) 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 the interface identified by the same value of ifIndex. Syntax INTEGER Access Read-write Status Deprecated atPhysAddress (1.3.6.1.2.1.3.1.1.2) The media-dependent "physical" address. Setting this object to a null string (one of zero (0) length) has the effect of invalidating the corresponding entry in the atTable object. That is, it effectively disassociates the interface identified with the entry from the mapping identified with the entry. Whether the agent removes an invalidated entry from the table is an implementation-specific matter. Accordingly, management workstations 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. HP StorageWorks 8/20q and SN6000 Fibre Channel Switch Simple Network Management Protocol Reference Guide 31

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HP StorageWorks 8/20q and SN6000 Fibre Channel Switch Simple Network Management Protocol Reference Guide
31
Status
Mandatory
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
IDENTIFIER { 0 0 }
, which is a syntactically valid object identifier, and any conformant
implementation of ASN.1 (Abstract Syntax Notation) and Bit Error Rate (BER) must be able to generate and
recognize this value.
Syntax
OBJECT IDENTIFIER
Access
Read-only
Status
Mandatory
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 included solely for compatibility with MIB-I nodes, and is most likely to
be excluded from MIB-III nodes. From MIB-II and higher nodes, 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 when translations tables might be used include broadcast media where Address Resolution
Protocol (ARP) is in use and the translation table is equivalent; 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.
atIfIndex (1.3.6.1.2.1.3.1.1.1)
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 the interface identified by the same value of
ifIndex
.
Syntax
INTEGER
Access
Read-write
Status
Deprecated
atPhysAddress (1.3.6.1.2.1.3.1.1.2)
The media-dependent “physical” address. Setting this object to a null string (one of zero
(0)
length) has
the effect of invalidating the corresponding entry in the
atTable
object. That is, it effectively disassociates
the interface identified with the entry from the mapping identified with the entry. Whether the agent
removes an invalidated entry from the table is an implementation-specific matter. Accordingly,
management workstations 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.