User Manual

Monitor the System
621
M4200 and M4300 Series ProSAFE Managed Switches Web Management User Manual
Packets Received > 1518
Octets
The total number of packets received that were longer than 1518 octets
(excluding framing bits, but including FCS octets) and were otherwise well
formed.
Total Packets Received
Without Errors
The total number of packets received that were without errors.
Unicast Packets Received The number of subnetwork-unicast packets delivered to a higher-Layer
protocol.
Multicast Packets Received The total number of good packets received that were directed to a multicast
address. This number does not include packets directed to the broadcast
address.
Broadcast Packets Received The total number of good packets received that were directed to the
broadcast address. This does not include multicast packets.
Receive Packets Discarded The number of inbound packets that were discarded even though no errors
were detected to prevent their being delivered to a higher-layer protocol. A
possible reason for discarding a packet could be to free up buffer space.
Total Packets Received with
MAC Errors
The total number of inbound packets that contained errors preventing them
from being deliverable to a higher-Layer protocol.
Jabbers Received The total number of packets received that were longer than 1518 octets
(excluding framing bits, but including FCS octets), and had either a bad
frame check sequence (FCS) with an integral number of octets (FCS Error)
or a bad FCS with a nonintegral number of octets (alignment error). This
definition of jabber is different from the definition in IEEE-802.3 section
8.2.1.5 (10BASE5) and section 10.3.1.4 (10BASE2). These documents
define jabber as the condition where any packet exceeds 20 ms. The
allowed range to detect jabber is between 20 ms and 150 ms.
Fragments Received The total number of packets received that were less than 64 octets in length
with ERROR CRC (excluding framing bits but including FCS octets).
Undersize Received The total number of packets received that were less than 64 octets in length
with GOOD CRC (excluding framing bits but including FCS octets).
Alignment Errors The total number of packets received with a length (excluding framing bits,
but including FCS octets) of between 64 and 1518 octets, inclusive, but had
a bad frame check sequence (FCS) with a nonintegral number of octets.
Rx FCS Errors The total number of packets received with a length (excluding framing bits,
but including FCS octets) of between 64 and 1518 octets, inclusive, but had
a bad frame check sequence (FCS) with an integral number of octets
Overruns The total number of frames discarded because this port was overloaded with
incoming packets, and could not keep up with the inflow.
Total Received Packets Not
Forwarded
A count of valid frames received that were discarded (that is, filtered) by the
forwarding process.
Table 219. Port Detailed Statistics (continued)
Field Description