rfc1158.txt
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TXT
2,201 行
OBJECT:
-------
ifOutUcastPkts { ifEntry 17 }
Syntax:
Counter
Definition:
The total number of packets that higher-level protocols
requested be transmitted to a subnetwork-unicast address,
including those that were discarded or not sent.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 24]
RFC 1158 MIB II May 1990
OBJECT:
-------
ifOutNUcastPkts { ifEntry 18 }
Syntax:
Counter
Definition:
The total number of packets that higher-level protocols
requested be transmitted to a non-unicast (i.e., a
subnetwork-broadcast or subnetwork-multicast) address,
including those that were discarded or not sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutDiscards { ifEntry 19 }
Syntax:
Counter
Definition:
The number of outbound packets which were chosen to be
discarded even though no errors had been detected to
prevent their being transmitted. One possible reason for
discarding such a packet could be to free up buffer
space.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutErrors { ifEntry 20 }
Syntax:
Counter
IETF SNMP Working Group [Page 25]
RFC 1158 MIB II May 1990
Definition:
The number of outbound packets that could not be
transmitted because of errors.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutQLen { ifEntry 21 }
Syntax:
Gauge
Definition:
The length of the output packet queue (in packets).
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifSpecific { ifEntry 22 }
Syntax:
OBJECT IDENTIFIER
Definition:
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 defining
objects specific to ethernet. If an agent is not
configured to have a value for any of these variables,
the object identifier
nullSpecific OBJECT IDENTIFIER ::= { 0 0 }
is returned. Note that "nullSpecific" is a syntatically
valid object identifier, and any conformant
IETF SNMP Working Group [Page 26]
RFC 1158 MIB II May 1990
implementation of ASN.1 and BER must be able to generate
and recognize this value.
Access:
read-only.
Status:
mandatory.
5.3. The Address Translation Group
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 (e.g., 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.
OBJECT:
-------
atTable { at 1 }
Syntax:
SEQUENCE OF AtEntry
Definition:
The Address Translation tables contain the NetworkAddress
to "physical" address equivalences. Some interfaces do
not use translation tables for determining address
equivalences (e.g., DDN-X.25 has an algorithmic method);
if all interfaces are of this type, then the Address
Translation table is empty, i.e., has zero entries.
Access:
read-write.
IETF SNMP Working Group [Page 27]
RFC 1158 MIB II May 1990
Status:
deprecated.
OBJECT:
-------
atEntry { atTable 1 }
Syntax:
AtEntry ::= SEQUENCE {
atIfIndex
INTEGER,
atPhysAddress
OCTET STRING,
atNetAddress
NetworkAddress
}
Definition:
Each entry contains one NetworkAddress to "physical"
address equivalence.
Access:
read-write.
Status:
deprecated.
We now consider the individual components of each Address
Translation table entry:
OBJECT:
-------
atIfIndex { atEntry 1 }
Syntax:
INTEGER
Definition:
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.
Access:
read-write.
IETF SNMP Working Group [Page 28]
RFC 1158 MIB II May 1990
Status:
deprecated.
OBJECT:
-------
atPhysAddress { atEntry 2 }
Syntax:
OCTET STRING
Definition:
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.
Access:
read-write.
Status:
deprecated.
OBJECT:
-------
atNetAddress { atEntry 3 }
Syntax:
NetworkAddress
Definition:
The NetworkAddress (e.g., the IP address) corresponding
to the media-dependent "physical" address.
Access:
read-write.
IETF SNMP Working Group [Page 29]
RFC 1158 MIB II May 1990
Status:
deprecated.
5.4. The IP Group
Implementation of the IP group is mandatory for all systems.
OBJECT:
-------
ipForwarding { ip 1 }
Syntax:
INTEGER {
forwarding(1), -- i.e., acting as a gateway
not-forwarding(2) -- i.e., NOT acting as a gateway
}
Definition:
The indication of whether this entity is acting as an IP
gateway in respect to the forwarding of datagrams
received by, but not addressed to, this entity. IP
gateways forward datagrams. IP hosts do not (except
those source-routed via the host).
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipDefaultTTL { ip 2 }
Syntax:
INTEGER
Definition:
The default value inserted into the Time-To-Live field of
the IP header of datagrams originated at this entity,
whenever a TTL value is not supplied by the transport
layer protocol.
Access:
read-write.
IETF SNMP Working Group [Page 30]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
ipInReceives { ip 3 }
Syntax:
Counter
Definition:
The total number of input datagrams received from
interfaces, including those received in error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInHdrErrors { ip 4 }
Syntax:
Counter
Definition:
The number of input datagrams discarded due to errors in
their IP headers, including bad checksums, version number
mismatch, other format errors, time-to-live exceeded,
errors discovered in processing their IP options, etc.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInAddrErrors { ip 5 }
Syntax:
Counter
IETF SNMP Working Group [Page 31]
RFC 1158 MIB II May 1990
Definition:
The number of input datagrams discarded because the IP
address in their IP header's destination field was not a
valid address to be received at this entity. This count
includes invalid addresses (e.g., 0.0.0.0) and addresses
of unsupported Classes (e.g., Class E). For entities
which are not IP Gateways and therefore do not forward
datagrams, this counter includes datagrams discarded
because the destination address was not a local address.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipForwDatagrams { ip 6 }
Syntax:
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