LevelOne GTL-2690 - Manual (Page 333)

IP Routing
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19
Displaying Statistics for IP Protocols
IP Statistics
The Internet Protocol (IP) provides a mechanism for transmitting blocks of data
(often called packets or frames) from a source to a destination, where these network
devices (i.e., hosts) are identified by fixed length addresses. The Internet Protocol
also provides for fragmentation and reassembly of long packets, if necessary, for
transmission through “small packet” networks.
Table 19-3 IP Statistics
Parameter Description
Packets Received The total number of input datagrams received from interfaces, including
those received in error.
Received Address Errors The number of input datagrams discarded because the IP address in the
header's destination field was not a valid address for this entity.
Received Packets Discarded The number of input datagrams for which no problems were encountered
to prevent their continued processing, but which were discarded (e.g., for
lack of buffer space).
Output Requests The total number of datagrams which local IP user-protocols (including
ICMP) supplied to IP in requests for transmission.
Output Packet No Route The number of datagrams discarded because no route could be found to
transmit them to their destination. Note that this includes any datagrams
which a host cannot route because all of its default gateways are down.
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.