Troubleshooting guide

• If you do not see any green “link” LEDs illuminated, is the switch powered

on?

• If you do not see green “link” LEDs illuminated on only a specific line card, is

the line card properly seated in the enclosure? (Refer to the “Guide to

Switches and Switch Networks” for the proper procedure to insert/remove a

line card.)

• If you do not see a green “link” LED on a specific port on a NIC or port on a

line card, is the port connected by a cable to another component?

• If a NIC port does not have a green link LED illuminated, is its host powered

on?

• Have you tried disconnecting and reconnecting the cable at both ends (at the

NIC port and the port on the line card)?

• Have you tried a different cable or a different port on the line card?

The yellow "Lanai" LED is controlled by the Lanai processor, and will pulse like a

heartbeat while the MCP/firmware is running. If an error occurs, the yellow "Lanai"

LED will pulse an S.O.S signal. If the yellow LED is not pulsing, the GM-2 MCP is not

loaded or is not running.

If you have tried all of these procedures and you cannot resolve the problem, contact

help@myri.com for assistance. You cannot continue with the software installation until

this issue is resolved.

Further Details

The GM_INSTALL script copies the GM binaries to the specified binary installation

directory <install_path>.

The gm_install_drivers script performs the following operations:

• Copies gm.o into /lib/modules/<KERNEL-VERSION>/gm/gm.o

• Removes the previous installation by executing /sbin/gm_uninstall_drivers

(using rmmod)

• Copies other files from the binary installation directory to an architecture-

specific directory (/etc/init.d/).

• Creates the devices (/dev/gm* and /dev/gmp*), one device per NIC

• Creates the mapper’s per-host configuration directory (/etc/gm_mapper) and

possibly stores configuration files there.

The gm “start” script performs the following operations:

• Loads the GM module (using insmod)

• Starts a mapper daemon called gm_mapper for each Myrinet NIC contained in

the machine. The PIDs of the running gm_mappers are stored in