IP performance counter

Meaning

Datagrams Forwarded/Second

The rate of input datagrams for which this entity was not their final IP destination that resulted in an attempt to find a route to forward them to that final destination. In entities that do not act as IP Gateways, this rate includes only those packets that were Source-Routed via this entity, when the Source-Route option processing was successful.

Datagrams Outbound Discarded

The number of output IP datagrams for which no problems were encountered to prevent their transmission to their destination, but which were discarded (for example, for lack of buffer space.) This counter would include datagrams counted in Datagrams Forwarded if any such packets met this (discretionary) discard criterion.

Datagrams Outbound No Route

The number of IP datagrams discarded because no route could be found to transmit them to their destination. This counter includes any packets counted in Datagrams Forwarded that meet this "no route" criterion.

Datagrams Received Address Errors

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 (for example, 0.0.0.0) and addresses of unsupported Classes (for example, Class E). For entities that are not IP gateways and therefore do not forward datagrams, this counter includes datagrams discarded because the destination address was not a local address.

Datagrams Received Delivered/Second

The rate at which input datagrams are successfully delivered to IP user protocols (including ICMP).

Datagrams Received Discarded

The number of input IP datagrams for which no problems were encountered to prevent their continued processing, but which were discarded (for example, for lack of buffer space). This counter does not include any datagrams discarded while awaiting reassembly.

Datagrams Received Header Errors

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, and so on.

Datagrams Received Unknown Protocol

The number of locally addressed datagrams received successfully but discarded because of an unknown or unsupported protocol.

Datagrams Received/Second

The rate at which IP datagrams are received from the interfaces, including those in error.

Datagrams Sent/Second

The rate at which IP datagrams are supplied to IP for transmission by local IP user protocols (including ICMP). This counter does not include any datagrams counted in Datagrams Forwarded.

Datagrams/Second

The rate at which IP datagrams are received from or sent to the interfaces, including those in error. Any forwarded datagrams are not included in this rate.

Fragment Re-assembly Failures

The number of failures detected by the IP reassembly algorithm (for whatever reason: timed out, errors, and so on). This is not necessarily a count of discarded IP fragments, because some algorithms (notably RFC 815) can lose track of the number of fragments by combining them as they are received.

Fragmentation Failures

The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be, for example, because their "Don't Fragment" flag was set.

Fragmented Datagrams/Second

The rate at which datagrams are successfully fragmented at this entity.

Fragments Created/Second

The rate at which IP datagram fragments have been generated as a result of fragmentation at this entity.

Fragments
Re-assembled/Second

The rate at which IP fragments are successfully reassembled.

Fragments Received/Second

The rate at which IP fragments that need to be reassembled at this entity are received.