Utility Commands
375
ProSAFE M7100 Managed Switches
Receive Packets
Discarded
The number of inbound packets which were chosen to be discarded even though no errors had
been detected to prevent their being deliverable to a higher-layer protocol. One possible
reason for discarding such a packet could be to free up buffer space.
Packets Received
with MA
C Er
rors
• 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 R
ec
eived - 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
non-integral number of octets (Alignment Error). Note that this definition of jabber is
different than 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 20–150 ms.
• F
ragments/Undersize Received - The total number of packets received that were less than
64 oc
tets in length (excluding framing bits but including FCS octets).
• Alignment Er
r
ors - The total number of packets received that had a length (excluding
framing bits, but including FCS octets) of from 64 through 1518 octets, inclusive, but had
a bad Frame Check Sequence (FCS) with a non-integral number of octets.
• Rx FCS Er
r
ors - The total number of packets received that had a length (excluding framing
bits, but including FCS octets) of from 64 through 1518 octets, inclusive, but had a bad
Frame Check Sequence (FCS) with an integral number of octets.
• Ov
erruns - The total number of frames discarded as this port was overloaded with
inc
oming packets, and could not keep up with the inflow.
Received Packets
Not For
warded
• Total Received Packets Not Forwarded - A count of valid frames received which were
discarded (in other words, filtered) by the forwarding process
• L
ocal Traffic Frames - The total number of frames dropped in the forwarding process
bec
ause the destination address was located off of this port.
• 802.3x P
ause F
rames Received - A count of MAC Control frames received on this
interface with an opcode indicating the PAUSE operation. This counter does not increment
when the interface is operating in half-duplex mode.
• Unac
ceptable Frame Type - The number of frames discarded from this port due to being an
unac
ceptable frame type.
• M
ulticast Tree Viable Discards - The number of frames discarded when a lookup in the
multic
ast tree for a VLAN occurs while that tree is being modified.
• R
eserved Address Discards - The number of frames discarded that are destined to an IEEE
802.1 r
eserved address and are not supported by the system.
• Br
oadcast Storm Recovery - The number of frames discarded that are destined for
FF:FF:FF:FF:FF:FF when Br
oadcast Storm Recovery is enabled.
• CFI Disc
ards - The number of frames discarded that have CFI bit set and the addresses in
RIF ar
e in non-canonical format.
• Upstream Threshold - The number of frames discarded due to lack of cell descriptors
available for that packet's priority level.
Term Definition
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