PM3351-SW datasheet(96/268 Pages) PMC

96 / 268 page

PM3351 ELAN 1X100

DATA SHEET

PMC-970113

ISSUE 3

SINGLE PORT FAST ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

JabberErrors:

32-bit count of frames received on this MAC port that failed the FCS check

and was longer than the preset maximum frame length.

ShortErrors:

32-bit count of frames received on this MAC port that passed the FCS check

but were below the preset minimum frame length (nominally 64 octets).

FragErrors:

32-bit count of frames received on this MAC port that failed the FCS check

and were below the preset minimum frame length. These frames are typically

collision fragments.

LimitErrors:

32-bit count of frames received on this MAC port that were dropped due to

lack of buffer space to hold them (i.e., as a result of congestion).

LengthErrors:

32-bit count of frames received on this MAC port that failed the IEEE 802.3

length check (i.e., the Length field within the frame was between 45 and 1499

inclusive, but did not match the actual frame length).

TXErrors:

32-bit count of frames that were dropped while being transmitted out this

MAC port. This counter is always zero during full-duplex operation; in half-

duplex mode, it is incremented whenever a valid frame is dropped from the

transmit FIFO due to late collision, excessive collisions, or excessive carrier

deference.

RxBcstFrames:

32-bit count of valid broadcast frames received on this port (that is, the

destination address of the received frame is all-ones, corresponding to the

IEEE 802.3 broadcast address).

RXBcastOctets:

32-bit count of octets in valid broadcast frames received on this port.

RxFloodFrames:

32-bit count of valid frames received on this port that were flooded to all ports

on the spanning tree. A frame is flooded if the 48-bit destination address is

not an IEEE 802.3 Group/Functional address (i.e., the LSB of the address is

zero, indicating a unicast destination) and an entry for the destination address

is not present in the address table.

PM3351-SW Datasheet(PDF) 96 Page - PMC-Sierra, Inc