Use the IP attribute group to monitor IP gateway performance. Attributes in this group detail the success of the system's IP datagram transmissions. The Management Information Base (MIB-II) detailed in RFC1213, for use with network management protocols in TCP/IP-based internets, establishes and defines the attributes of this group.
The IP attributes are available for the SNMP Data Provider.
Agent Name Identifies the SNMP host name relating to a particular sample of data. A valid entry is an alphanumeric text string, with a maximum length of 64 characters.
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. A valid entry is an integer of up to four digits.
ipForwarding Indicates 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). A valid entry is an alphanumeric text string, with a maximum length of 64 characters. Possible values include:
1 = forwarding
2 = not-forwarding
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 that do not act as IP Gateways, this counter includes only those packets that were Source-Routed using this entity, and the Source-Route option processing was successful. A valid entry is an integer of up to four digits.
ipFragCreates The number of IP datagram fragments that have been generated as a result of fragmentation at this entity. A valid entry is an integer of up to four digits.
ipFragFails The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be. For example, the IP datagrams did not set the Don't Fragment flag. A valid entry is an integer of up to four digits.
ipFragOKs The number of IP datagrams that have been successfully fragmented at this entity. A valid entry is an integer of up to four digits.
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 incorrect addresses, such as 0.0.0.0, and addresses of unsupported Classes, such as 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. A valid entry is an integer of up to four digits.
ipInDelivers The total number of input datagrams successfully delivered to IP user-protocols (including ICMP). A valid entry is an integer of up to four digits.
ipInDiscards The number of input IP datagrams for which no problems were encountered to prevent their continued processing, but which were discarded. For example, an IP datagram might be discarded for a lack of buffer space. Note that this counter does not include any datagrams discarded while awaiting re-assembly. A valid entry is an integer of up to four digits.
ipInHdrErrors The number of input datagrams discarded because of 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. A valid entry is an integer of up to four digits.
ipInReceives The total number of input datagrams received from interfaces, including those received in error. A valid entry is an integer of up to four digits.
ipInUnknownProtos The number of locally-addressed datagrams received successfully but discarded because of an unknown or unsupported protocol.
Valid entry is an integer of up to four digits.
ipOutDiscards The number of output IP datagrams for which no problem was encountered to prevent their transmission to their destination, but which were discarded For example, an IP datagram might be discarded for a lack of buffer space. Note that this counter includes datagrams counted in ipForwDatagrams if any such packets met this (discretionary) discard criterion. Valid entry is an integer of up to four digits.
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 which meet this `no-route' criterion. Note that this includes any datagrams that a host cannot route because all of its default gateways are down. A valid entry is an integer of up to four digits.
ipOutRequests The total number of IP datagrams that 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. A valid entry is an integer of up to four digits.
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. A valid entry is an integer of up to four digits.
ipReasmOKs The number of IP datagrams successfully reassembled. A valid entry is an integer of up to four digits.
ipReasmReqds The number of IP fragments received that needed to be reassembled at this entity. A valid entry is an integer of up to four digits.
ipReasmTimeout The maximum number of seconds that received fragments are held while they are awaiting to be reassembled at this entity. A valid entry is an integer of up to four digits.