Sena User Manual

Figure 7-2 Serial ports status

7.3. IP Statistics

The IP Statistics screen provides statistical information about packets/connections using an IP protocol. Definitions and descriptions of each parameter are described below:

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Forwarding :

Specifies whether IP forwarding is enabled or disabled.



DefaultTTL :

Specifies the default initial time to live (TTL) for datagrams originating on a particular computer.



InReceives :

Shows the number of datagrams received.

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InHdrErrors :

Shows the number of datagrams received that have header errors. Datagrams Received Header

Errors is 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.



InAddrErrors :

Specifies the number of datagrams received that have address errors. These datagrams are 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).



ForwDatagrams :

Specifies the number of datagrams forwarded.

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

InUnknownProtos :

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

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InDiscard :

Specifies 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.



InDelivers :

Specifies the number of received datagrams delivered.

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OutRequests :

Specifies the number of outgoing datagrams that an IP is requested to transmit. This number does not include forwarded datagrams.



OutDiscards :

Specifies the number of transmitted datagrams discarded. These are 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.



OutNoRoutes :

Specifies the number of datagrams for which no route could be found to transmit them to the destination IP address. These datagrams were discarded. This counter includes any packets counted in Datagrams Forwarded that meet this "no route" criterion.

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ReasmTimeout :

Specifies the amount of time allowed for all pieces of a fragmented datagram to arrive. If all pieces do not arrive within this time, the datagram is discarded.



ReasmReqds :

Specifies the number of datagrams that require reassembly.



ReasmOKs :

Specifies the number of datagrams that were successfully reassembled.

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