© 2001, Myricom, Inc.
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Revision: 27 August 2001
switch settings. The default settings determined by the switches can be over-ridden via an M3-M
monitoring line card.
M3-SW16-8M Line Card
The purpose of the M3-SW12-4L line card is to provide for backward compatibility with 2nd-
generation Myrinet-1280 LAN ports.
The following photograph shows the front panels of four types of M3-SW16 port line cards –
M3-SW16-8S, M3-SW16-8F, M3-SW12-4L, and M3-SW16-8M (top to bottom) – installed and
powered in adjacent slots of a switch enclosure.
The M3-SW16-8S, M3-SW16-8F, and M3-SW12-4L include LEDs for each port. The port
LEDs become green when a port is connected through a cable to an active port, and will blink
when traffic is flowing.
The M3-SW16-8S, M3-SW16-8F, and M3-SW12-4L also include a Status LED for the line card.
When a line card is inserted, the Status LED shows green within ~0.5 seconds if the line card has
passed its self-test and all voltages, temperatures, and internal status bits are at nominal levels. If
the line card has a fault, the Status LED will be yellow. The Status LED is controlled by the line
card’s µC, and all of the detail information about the status of the line card is available from the
monitoring line card. This information includes:
•
The type of line card and its serial number,
•
All information from the XBar16 scan path (port state, packet counts, CRC errors),
