User Manual

Monitor the System
372
Insight Managed 8-Port Gigabit Ethernet Smart Cloud Switch with 2 SFP Fiber Ports
Unicast Packets Received The number of subnetwork-unicast packets delivered to a higher-layer protocol.
Multicast Packets Received The total number of well-formed 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 well-formed 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 the packets from being delivered to a higher-layer
protocol. A possible reason for discarding a packet could be to free buffer space.
Total Packets Received with
MAC Errors
The total number of inbound packets that contained errors, preventing them
from being delivered 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 included 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 a 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 in which any packet exceeds 20 ms. The allowed range
to detect jabbers 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 included 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 included a
bad frame check sequence (FCS) with an integral number of octets.
Overruns The total number of frames discarded because the port was overloaded with
incoming packets, and could not keep up with the inflow.
Total Received Packets Not
Forwarded
The number of valid frames received that were discarded (that is, filtered) by the
forwarding process.
802.3x Pause Frames
Received
The number of MAC control frames received with an opcode indicating the
PAUSE operation. This counter does not increment when the interface is
operating in half-duplex mode.
Unacceptable Frame Type The number of frames discarded from this port due to being an unacceptable
frame type.
Table 87. Detailed port statistics (continued)
Field Description