Monitoring IP Counters

Use the IP Counters window for help on monitoring IP forwarding counter statistics.  This window displays the statistics related to the IP forwarding process, including a count of routing errors, along with the number of packets that were dropped due to congestion.

Note: The IP Counters window does not appear in the application tree when IP Routing is disabled.

Field Descriptions

Receive Group Received packets that were dropped, terminated or forwarded.
Transmit Group Transmitted packets that were generated, dropped or forwarded.
Reassembly Group Packets that were reassembled successfully, failed or requested.
Fragmentation Group Packets that were fragmented successfully, failed or created.
Routing table overflow Number of routes that were discarded due to the routing table being full.
Net unreachable Number of packets that were not forwarded due to unknown destinations. This does not count the number of packets that were forwarded to the authoritative router (default gateway).
Bad subnet number Number of packets or routes that were received for illegal subnets (all ones or all zeros).
Bad net number Number of packets or routes that were received for illegal IP destinations (for example, class E addresses).
Unhandled broadcast Number of (nonlocal) IP broadcasts received (these are not forwarded).
Unhandled multicast Number of IP multicasts that were received but whose address was not recognized by the router (these are discarded).
Unhandled directed broadcast Number of directed (nonlocal) IP broadcasts received when forwarding of these packets is disabled.
Attempted forward of LL broadcast Number of packets that are received having nonlocal IP addresses but were sent to a link level broadcast address. These are discarded.
Packets discarded through filter Number of received packets that were addressed to filtered networks/subnets. These are discarded silently.
IP multicast accepted Number of IP multicasts that were received and successfully processed by the router.
IP input packet overflow errors Number of packets that were discarded due to congestion at the forwarder’s input queue. These counts are sorted by the receiving interface.