Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 532)

The Switch Menu
Page 18-36
Rx LLC Errored Octets . The total number of bytes received in bad LLC packets.
The next group of statistics are the types of packets being transmitted and received.
Rx Unicast Packets . The number of packets received on this port whose destination address is
a unicast format.
Tx Unicast Packets . The number of packets transmitted on this port whose destination address
is a unicast format.
Rx Multicast Packets . The number of packets received on this port whose destination address is
a multicast format.
Tx Multicast Packets . The number of packets transmitted on this port whose destination
address is a multicast format.
Rx Broadcast Packets . The number of packets received on this port whose destination address
is the broadcast address.
Tx Broadcast Packets . The number of packets transmitted on this port whose destination
address is the broadcast address.
Note that these statistics merely indicate the format of the destination address of packets
transmitted/received on this port, not that the addressed device and/or devices necessarily
reside on that port. For example, unknown unicast addressed packets are flooded to many
ports.
The next group of statistics are the buffer resource related statistics. The NI board receives
packets from the backplane to be transmitted to the network ports and receives packets from
the network ports to be transmitted to the backplane. It requires buffers to store these pack-
ets in while being transferred across the board in this manner. Under heavy and congested
traffic a shortage of buffers or lack of timely access to these buffers may occur. These statis-
tics count these events which are more indicative of the amount of traffic on the board as
opposed to this particular port.
Rx Buffer Discards . Due to congestion of traffic from multiple ports on the board, timely access
to buffers was not available to receive a frame from the network port and the frame was
discarded.
Tx Buffer Discards . Due to a shortage of buffers and/or congestion on the network port, pack-
ets received from the backplane destined to this port were dropped.
The next group are also indicative of network segment health but are indicative of ill health
and indicate events where a frame is lost.
Rx Error Discards . The total number of errored packets (bad CRC, code violations, invalid
frame length, etc.) received by this port that were discarded.
Tx Error Discards . The total number of errored packets exceeding the maximum frame length
(MTU exceeded, FIFO uderruns, etc.) by this port that were discarded.
The next group describe events that can occur when stations are inserted or removed from a
ring.
Ring Purge Events . The total number of times this port enters the ring purge state from the
normal ring state.
Ring Purge Packets . The total number of times that this port enters a beaconing state.
Beacon Events . The total number of beacon packets received and transmitted by this port.
Beacon Packets . The number of beacon MAC packets detected by this port.
Claim Token Events . The total number of times that this port enters the claim token state from