I/F Summary Information 2-17
The 9E312/9E423 Module View
(ifOutUcastPkts) “The number of subnetwork unicast packets delivered to a
higher-layer protocol.”
A unicast is a transmission sent to only one station. This field displays the number
of unicasts received from, or transmitted to, a higher-layer protocol.
Multicast
(ifInNUcastPkts) “The number of non-unicast (i.e., subnetwork-broadcast or
subnetwork multi-cast) packets received from a higher-layer protocol.”
(ifOutNUcastPkts) “The number of non-unicast (i.e., subnetwork-broadcast or
subnetwork multi-cast) packets delivered to a higher-layer protocol.”
A multicast is a transmission which is simultaneously sent to more than one
station at a time. This field displays the number of multicast packets (including
broadcast packets) delivered to, or requested to be transmitted from, the higher-
layer protocol.
Discarded
(ifInDiscards) “The number of inbound packets which were chosen to be
discarded even though no errors had been detected to prevent their being
transmitted. One possible reason for discarding such a packet could be to free up
buffer space.”
(ifOutDiscards) “The number of inbound or outbound packets which were
chosen to be discarded even though no errors had been detected to prevent their
being deliverable. One possible reason for discarding such a packet could be to
free up buffer space.”
Discarding good packets indicates a very busy network. If a device routinely
discards packets it usually means that network traffic is overwhelming the device
perhaps because the device is performing poorly.
Error
(ifInErrors) “The number of inbound packets that contained errors preventing
them from being deliverable to a higher-layer protocol.”
(ifOutErrors) “The number of outbound packets that could not be transmitted
because of errors.”
A count of bad packets.
Unknown Protocol
(ifUnknownProtos) ���The number of packets received via the interface which were
discarded because of an unknown or unsupported protocol.”
A device discards a packet and increments this counter if it can’t recognize the
packet. This statistic appears only in the Input Table.
Transmit Queue Size
(ifOutQLen) “The length of the output packet queue (in packets).”