sysDescr |
A textual description of the entity. This
value should include the full name and version identification of the system's hardware
type, software operating-system, and networking software. It is mandatory that this only
contain printable ASCII characters. |
sysObjectID |
The vendor's authoritative identification
of the network management subsystem contained in the entity. This value is allocated
within the SMI enterprises subtree (1.3.6.1.4.1) and provides an easy and unambiguous
means for determining "what kind of box" is being managed. For example, if
vendor "Flintstones, Inc." was assigned the subtree 1.3.6.1.4.1.4242, it could
assign the identifier 1.3.6.1.4.1.4242.1.1 to its "Fred Router". |
sysUpTime |
The time (in hundredths of a second) since
the network management portion of the system was last re-initialized. |
sysContact |
The textual identification of the contact
person for this managed node, together with information on how to contact this person. |
sysName |
An administratively-assigned name for this
managed node. By convention, this is the node's fully-qualified domain name. |
sysLocation |
The physical location of this node
(e.g.,"telephone closet, 3rd floor"). |
sysServices |
A value which indicates the set of services
that this entity primarily offers. The value is a sum. This sum initially takes the
value zero. Then, for each layer, L, in the range 1 through 7, that this node performs
transactions for, 2 raised to (L - 1) is added to the sum. For example, a node that
performs primarily routing functions would have a value of 4 (2^(3-1)). In contrast, a
node which is a host offering application services would have a value of 72 (2^(4-1) +
2^(7-1)). Note that in the context of the Internet suite of protocols, values should be
calculated accordingly:
layer functionality
1 physical (e.g., repeaters)
2 datalink/subnetwork (e.g., bridges)
3 internet (e.g., IP gateways)
4 end-to-end(e.g., IP hosts)
7 applications (e.g., mail relays)
For systems including OSI protocols, layers 5 and 6 may also be counted. |
ifIndex |
A unique value for each interface. Its
value ranges between 1 and the value of ifNumber. The value for each interface must remain
constant at least from one re-initialization of the entity's network management system to
the next re-initialization. |
ifDescr |
A textual string containing information
about the interface. This string should include the name of the manufacturer, the product
name and the version of the hardware interface. |
ifType |
The type of interface, distinguished
according to the physical/link protocol(s) immediately "below" the network layer
in the protocol stack. |
ifMtu |
The size of the largest datagram which can
be sent/received on the interface, specified in octets. For interfaces that are used for
transmitting network datagrams, this is the size of the largest network datagram that can
be sent on the interface. |
ifSpeed |
An estimate of the interface's current
bandwidth in bits per second. For interfaces which do not vary in bandwidth or for those
where no accurate estimation can be made, this object should contain the nominal
bandwidth. |
ifPhysAddress |
The interface's address at the protocol
layer immediately "below" the network layer in the protocol stack. For
interfaces which do not have such an address (e.g., a serial line), this object should
contain an octet string of zero length. |
ifAdminStatus |
The desired state of the interface. The
testing(3) state indicates that no operational packets can be passed. |
ifOperStatus |
The current operational state of the
interface. The testing(3) state indicates that no operational packets can be passed. |
ifLastChange |
The value of sysUpTime at the time the
interface entered its current operational state. If the current state was entered prior to
the last re-initialization of the local network management subsystem, then this object
contains a zero value. |
ifInOctets |
The total number of octets received on the
interface, including framing characters. |
ifInUcastPkts |
The number of subnetwork-unicast packets
delivered to a higher-layer protocol. |
ifInNUcastPkts |
The number of non-unicast (i.e.,
subnetwork-broadcast or subnetwork-multicast) packets delivered to a higher-layer
protocol. |
ifInDiscards |
The number of inbound packets which were
chosen to be discarded even though no errors had been detected to prevent their being
deliverable to a higher-layer protocol. One possible reason for discarding such a packet
could be to free up buffer space. |
ifInErrors |
The number of inbound packets that
contained errors preventing them from being deliverable to a higher-layer protocol. |
ifInUnknownProtos |
The number of packets received via the
interface which were discarded because of an unknown or unsupported protocol. |
ifOutOctets |
The total number of octets transmitted out
of the interface, including framing characters. |
ifOutUcastPkts |
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. |
ifOutNUcastPkts |
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. |
ifOutDiscards |
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. |
ifOutErrors |
The number of outbound packets that could
not be transmitted because of errors. |
ifOutQLen |
The length of the output packet queue (in
packets). |
ifSpecific |
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 this information is not present, its value should be set
to the OBJECT IDENTIFIER { 0 0 }, which is a syntatically valid object identifier, and any
conformant implementation of ASN.1 and BER must be able to generate and recognize this
value. |
ipForwarding |
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). Note that for some managed nodes, this object may take on
only a subset of the values possible. Accordingly, it is appropriate for an agent to
return a "badValue" response if a management station attempts to change this
object to an inappropriate value. |
ipDefaultTTL |
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. |
ipInReceives |
The total number of input datagrams
received from interfaces, including those received in error. |
ipInHdrErrors |
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. |
ipInAddrErrors |
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. |
ipForwDatagrams |
The number of input datagrams for which
this entity was not their final IP destination, as a result of which an attempt was made
to find a route to forward them to that final destination. In entities which do not act as
IP Gateways, this counter will include only those packets which were Source-Routed via
this entity, and the Source- Route option processing was successful. |
ipInUnknownProtos |
The number of locally-addressed datagrams
received successfully but discarded because of an unknown or unsupported protocol. |
ipInDiscards |
The number of input IP datagrams for which
no problems were encountered to prevent their continued processing, but which were
discarded (e.g., for lack of buffer space). Note that this counter does not include any
datagrams discarded while awaiting re-assembly. |
ipInDelivers |
The total number of input datagrams
successfully delivered to IP user-protocols (including ICMP). |
ipOutRequests |
The total number of IP datagrams which
local IP user-protocols (including ICMP) supplied to IP in requests for transmission. Note
that this counter does not include any datagrams counted in ipForwDatagrams. |
ipOutDiscards |
The number of output IP datagrams for which
no problem was encountered to prevent their transmission to their destination, but which
were discarded (e.g., for lack of buffer space). Note that this counter would include
datagrams counted in ipForwDatagrams if any such packets met this (discretionary) discard
criterion. |
ipOutNoRoutes |
The number of IP datagrams discarded
because no route could be found to transmit them to their destination. Note that this
counter includes any packets counted in ipForwDatagrams that meet this
"no-route" criterion. Note that this includes any datagrams which a host cannot
route because all of its default gateways are down. |
ipReasmTimeout |
The maximum number of seconds that received
fragments are held while they are awaiting reassembly at this entity. |
ipReasmReqds |
The number of IP fragments received that
needed to be reassembled at this entity. |
ipReasmOKs |
The number of IP datagrams successfully
re-assembled. |
ipReasmFails |
The number of failures detected by the IP
re-assembly algorithm (for whatever reason: timed out, errors, etc). Note that this is not
necessarily a count of discarded IP fragments since some algorithms (notably the algorithm
in RFC 815) can lose track of the number of fragments by combining them as they are
received. |
ipFragOKs |
The number of IP datagrams that have been
successfully fragmented at this entity. |
ipFragFails |
The number of IP datagrams that have been
discarded because they needed to be fragmented at this entity but could not be, e.g.,
because their Don't Fragment flag was set. |
ipFragCreates |
The number of IP datagram fragments that
have been generated as a result of fragmentation at this entity. |
ipRoutingDiscards |
The number of routing entries which were
chosen to be discarded even though they are valid. One possible reason for discarding such
an entry could be to free-up buffer space for other routing entries. |
ipAdEntAddr |
The IP address to which this entry's
addressing information pertains. |
ipAdEntIfIndex |
The index value which uniquely identifies
the interface to which this entry is applicable. The interface identified by a particular
value of this index is the same interface as identified by the same value of ifIndex. |
ipAdEntNetMask |
The subnet mask associated with the IP
address of this entry. The value of the mask is an IP address with all the network bits
set to 1 and all the hosts bits set to 0. |
ipAdEntBcastAddr |
The value of the least-significant bit in
the IP broadcast address used for sending datagrams on the (logical) interface associated
with the IP address of this entry. For example, when the Internet standard all-ones
broadcast address is used, the value will be 1. This value applies to both the subnet and
network broadcasts addresses used by the entity on this (logical) interface. |
ipAdEntReasmMaxSize |
The size of the largest IP datagram which
this entity can re-assemble from incoming IP fragmented datagrams received on this
interface. |
ipRouteDest |
The destination IP address of this route.
An entry with a value of 0.0.0.0 is considered a default route. Multiple routes to a
single destination can appear in the table, but access to such multiple entries is
dependent on the table- access mechanisms defined by the network management protocol in
use. |
ipRouteIfIndex |
The index value which uniquely identifies
the local interface through which the next hop of this route should be reached. The
interface identified by a particular value of this index is the same interface as
identified by the same value of ifIndex. |
ipRouteMetric1 |
The primary routing metric for this route.
The semantics of this metric are determined by the routing-protocol specified in the
route's ipRouteProto value.If this metric is not used, its value should be set to -1. |
ipRouteMetric2 |
An alternate routing metric for this route.
The semantics of this metric are determined by the routing-protocol specified in the
route's ipRouteProto value.If this metric is not used, its value should be set to -1. |
ipRouteMetric3 |
An alternate routing metric for this route.
The semantics of this metric are determined by the routing-protocol specified in the
route's ipRouteProto value.If this metric is not used, its value should be set to -1. |
ipRouteMetric4 |
An alternate routing metric for this route.
The semantics of this metric are determined by the routing-protocol specified in the
route's ipRouteProto value.If this metric is not used, its value should be set to -1. |
ipRouteNextHop |
The IP address of the next hop of this
route. (In the case of a route bound to an interface which is realized via a broadcast
media, the value of this field is the agent's IP address on that interface.) |
ipRouteType |
The type of route. Note that the values
direct(3) and indirect(4) refer to the notion of direct and indirect routing in the IP
architecture. Setting this object to the value invalid(2) has the effect of
invalidating the corresponding entry in the ipRouteTable object. That is, it effectively
disassociates the destination identified with said entry from the route 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 ipRouteType
object. |
ipRouteProto |
The routing mechanism via which this route
was learned. Inclusion of values for gateway routing protocols is not intended to imply
that hosts should support those protocols. |
ipRouteAge |
The number of seconds since this route was
last updated or otherwise determined to be correct. Note that no semantics of "too
old" can be implied except through knowledge of the routing protocol by which the
route was learned. |
ipRouteMask |
Indicate the mask to be logical-ANDed with
the destination address before being compared to the value in the ipRouteDest field. For
those systems that do not support arbitrary subnet masks, an agent constructs the value of
the ipRouteMask by determining whether the value of the correspondent ipRouteDest field
belong to a class-A, B, or C network, and then using one of: mask
network
255.0.0.0
class-A
255.255.0.0 class-B
255.255.255.0 class-C
If the value of the ipRouteDest is 0.0.0.0 (a default route), then the mask value is
also 0.0.0.0. It should be noted that all IP routing subsystems implicitly use this
mechanism. |
ipRouteMetric5 |
An alternate routing metric for this route.
The semantics of this metric are determined by the routing-protocol specified in the
route's ipRouteProto value. If this metric is not used, its value should be set to -1. |
ipRouteInfo |
A reference to MIB definitions specific to
the particular routing protocol which is responsible for this route, as determined by the
value specified in the route's ipRouteProto value. If this information is not present, its
value should be set to the OBJECT IDENTIFIER { 0 0 }, which is a syntatically valid object
identifier, and any conformant implementation of ASN.1 and BER must be able to generate
and recognize this value. |
icmpInMsgs |
The total number of ICMP messages which the
entity received. Note that this counter includes all those counted by icmpInErrors. |
icmpInErrors |
The number of ICMP messages which the
entity received but determined as having ICMP-specific errors (bad ICMP checksums, bad
length, etc.). |
icmpInDestUnreachs |
The number of ICMP Destination Unreachable
messages received. |
icmpInTimeExcds |
The number of ICMP Time Exceeded messages
received. |
icmpInParmProbs |
The number of ICMP Parameter Problem
messages received. |
icmpInSrcQuenchs |
The number of ICMP Source Quench messages
received. |
icmpInRedirects |
The number of ICMP Source Quench messages
received. |
icmpInEchos |
The number of ICMP Echo (request) messages
received. |
icmpInEchoReps |
The number of ICMP Echo Reply messages
received. |
icmpInTimestamps |
The number of ICMP Timestamp (request)
messages received. |
icmpInTimestampReps |
The number of ICMP Timestamp Reply messages
received. |
icmpInAddrMasks |
The number of ICMP Address Mask Request
messages received. |
icmpInAddrMaskReps |
The number of ICMP Address Mask Reply
messages received. |
icmpOutMsgs |
The total number of ICMP messages which
this entity attempted to send. Note that this counter includes all those counted by
icmpOutErrors. |
icmpOutErrors |
The number of ICMP messages which this
entity did not send due to problems discovered within ICMP such as a lack of buffers. This
value should not include errors discovered outside the ICMP layer such as the inability of
IP to route the resultant datagram. In some implementations there may be no types of error
which contribute to this counter's value. |
icmpOutDestUnreachs |
The number of ICMP Destination Unreachable
messages sent. |
icmpOutTimeExcds |
The number of ICMP Time Exceeded messages
sent. |
icmpOutParmProbs |
The number of ICMP Parameter Problem
messages sent. |
icmpOutSrcQuenchs |
The number of ICMP Source Quench messages
sent. |
icmpOutRedirects |
The number of ICMP Redirect messages sent.
For a host, this object will always be zero, since hosts do not send redirects. |
icmpOutEchos |
The number of ICMP Echo (request) messages
sent. |
icmpOutEchoReps |
The number of ICMP Echo Reply messages
sent. |
icmpOutTimestamps |
The number of ICMP Timestamp (request)
messages sent. |
icmpOutTimestampReps |
The number of ICMP Timestamp Reply messages
sent. |
icmpOutAddrMasks |
The number of ICMP Address Mask Request
messages sent. |
icmpOutAddrMaskReps |
The number of ICMP Address Mask Reply
messages sent. |
tcpRtoAlgorithm |
The algorithm used to determine the timeout
value used for retransmitting unacknowledged octets. |
tcpRtoMin |
The minimum value permitted by a TCP
implementation for the retransmission timeout, measured in milliseconds. More refined
semantics for objects of this type depend upon the algorithm used to determine the
retransmission timeout.In particular, when the timeout algorithm is rsre(3), an object of
this type has the semantics of the LBOUND quantity described in RFC 793. |
tcpRtoMax |
The maximum value permitted by a TCP
implementation for the retransmission timeout, measured in milliseconds. More refined
semantics for objects of this type depend upon the algorithm used to determine the
retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of
this type has the semantics of the UBOUND quantity described in RFC 793. |
tcpMaxConn |
The limit on the total number of TCP
connections the entity can support. In entities where the maximum number of connections is
dynamic, this object should contain the value -1. |
tcpActiveOpens |
The number of times TCP connections have
made a direct transition to the SYN-SENT state from the CLOSED state. |
tcpPassiveOpens |
The number of times TCP connections have
made a direct transition to the SYN-RCVD state from the LISTEN state. |
tcpAttemptFails |
The number of times TCP connections have
made a direct transition to the CLOSED state from either the SYN-SENT state or the
SYN-RCVD state, plus the number of times TCP connections have made a direct transition to
the LISTEN state from the SYN-RCVD state. |
tcpEstabResets |
The number of times TCP connections have
made a direct transition to the CLOSED state from either the ESTABLISHED state or the
CLOSE-WAIT state. |
tcpCurrEstab |
The number of TCP connections for which the
current state is either ESTABLISHED or CLOSE-WAIT. |
tcpInSegs |
The total number of segments received,
including those received in error. This count includes segments received on currently
established connections. |
tcpOutSegs |
The total number of segments sent,
including those on current connections but excluding those containing only retransmitted
octets. |
tcpRetransSegs |
The total number of segments retransmitted
that is, the number of TCP segments transmitted containing one or more previously
transmitted octets. |
tcpInErrs |
The total number of segments received in
error (e.g., bad TCP checksums). |
tcpOutRsts |
The number of TCP segments sent containing
the RST flag. |
tcpConnState |
The state of this TCP connection. The
only value which may be set by a management station is deleteTCB(12). Accordingly, it is
appropriate for an agent to return a "badValue" response if a management station
attempts to set this object to any other value.
If a management station sets this object to the value deleteTCB(12), then this has the
effect of deleting the TCB (as defined in RFC 793) of the corresponding connection on the
managed node, resulting in immediate termination of the connection.
As an implementation-specific option, a RST segment may be sent from the managed node
to the other TCP endpoint (note however that RST segments are not sent reliably). |
tcpConnLocalAddress |
The local IP address for this TCP
connection.In the case of a connection in the listen state which is willing to accept
connections for any IP interface associated with the node, the value 0.0.0.0 is used. |
tcpConnLocalPort |
The local port number for this TCP
connection. |
tcpConnRemAddress |
The remote IP address for this TCP
connection. |
tcpConnRemPort |
The remote port number for this TCP
connection. |
snmpInPkts |
The total number of Messages delivered to
the SNMP entity from the transport service. |
snmpOutPkts |
The total number of SNMP Messages which
were passed from the SNMP protocol entity to the transport service. |
snmpInBadVersions |
The total number of SNMP Messages which
were delivered to the SNMP protocol entity and were for an unsupported SNMP version. |
snmpInBadCommunityNames |
The total number of SNMP Messages delivered
to the SNMP protocol entity which used a SNMP community name not known to said entity. |
snmpInBadCommunityUses |
The total number of SNMP Messages delivered
to the SNMP protocol entity which represented an SNMP operation which was not allowed by
the SNMP community named in the Message. |
snmpInASNParseErrs |
The total number of ASN.1 or BER errors
encountered by the SNMP protocol entity when decoding received SNMP Messages. |
snmpInTooBigs |
The total number of SNMP PDUs which were
delivered to the SNMP protocol entity and for which the value of the error-status field is
"tooBig". |
snmpInNoSuchNames |
The total number of SNMP PDUs which were
delivered to the SNMP protocol entity and for which the value of the error-status field is
"noSuchName". |
snmpInBadValues |
The total number of SNMP PDUs which were
delivered to the SNMP protocol entity and for which the value of the error-status field is
"badValue". |
snmpInReadOnlys |
The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for which the value of the error-status field is
"readOnly". It should be noted that it is a protocol error to generate an SNMP
PDU which contains the value "readOnly" in the error-status field, as such this
object is provided as a means of detecting incorrect implementations of the SNMP. |
snmpInGenErrs |
The total number of SNMP PDUs which were
delivered to the SNMP protocol entity and for which the value of the error-status field is
"genErr". |
snmpInTotalReqVars |
The total number of MIB objects which have
been retrieved successfully by the SNMP protocol entity as the result of receiving valid
SNMP Get-Request and Get-Next PDUs. |
snmpInTotalSetVars |
The total number of MIB objects which have
been altered successfully by the SNMP protocol entity as the result of receiving valid
SNMP Set-Request PDUs. |
snmpInGetRequests |
The total number of SNMP Get-Request PDUs
which have been accepted and processed by the SNMP protocol entity. |
snmpInGetNexts |
The total number of SNMP Get-Next PDUs
which have been accepted and processed by the SNMP protocol entity. |
snmpInSetRequests |
The total number of SNMP Set-Request PDUs
which have been accepted and processed by the SNMP protocol entity. |
snmpInGetResponses |
The total number of SNMP Get-Response PDUs
which have been accepted and processed by the SNMP protocol entity. |
snmpInTraps |
The total number of SNMP Trap PDUs which
have been accepted and processed by the SNMP protocol entity. |
snmpOutTooBigs |
The total number of SNMP PDUs which were
generated by the SNMP protocol entity and for which the value of the error-status field is
"tooBig". |
snmpOutNoSuchNames |
The total number of SNMP PDUs which were
generated by the SNMP protocol entity and for which the value of the error-status is
"noSuchName". |
snmpOutBadValues |
The total number of SNMP PDUs which were
generated by the SNMP protocol entity and for which the value of the error-status field is
"badValue". |
snmpOutGenErrs |
The total number of SNMP PDUs which were
generated by the SNMP protocol entity and for which the value of the error-status field is
"genErr". |
snmpOutGetRequests |
The total number of SNMP Get-Request PDUs
which have been generated by the SNMP protocol entity. |
snmpOutGetNexts |
The total number of SNMP Get-Next PDUs
which have been generated by the SNMP protocol entity. |
snmpOutSetRequests |
The total number of SNMP Set-Request PDUs
which have been generated by the SNMP protocol entity. |
snmpOutGetResponses |
The total number of SNMP Get-Response PDUs
which have been generated by the SNMP protocol entity. |
snmpOutTraps |
The total number of SNMP Trap PDUs which
have been generated by the SNMP protocol entity. |
snmpEnableAuthenTraps |
Indicates whether the SNMP agent process is
permitted to generate authentication-failure traps. The value of this object overrides any
configuration information; as such, it provides a means whereby all authentication-failure
traps may be disabled. Note that it is strongly recommended that this object be stored
in non-volatile memory so that it remains constant between re-initializations of the
network management system. |