IP Routing
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Datagrams Forwarded 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.
Reassembly Required The number of IP fragments received which needed to be reassembled at
this entity.
Reassembly Failures The number of failures detected by the IP re-assembly algorithm (for
whatever reason: timed out, errors, etc.).
Datagrams Failing
Fragmentation
The number of 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.
Received Header Errors 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.
Unknown Protocols Received The number of locally-addressed datagrams received successfully but
discarded because of an unknown or unsupported protocol.
Received Packets Delivered The total number of input datagrams successfully delivered to IP
user-protocols (including ICMP).
Discarded Output Packets 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).
Fragments Created The number of datagram fragments that have been generated as a result
of fragmentation at this entity.
Routing Discards 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.
Reassembly Successful The number of datagrams successfully re-assembled.
Datagrams Successfully
Fragmented
The number of IP datagrams that have been successfully fragmented at
this entity.
Table 3-18 IP Statistics (Continued)
Parameter Description