Troubleshooting guide

<install_path>/sbin/gm_install_drivers

/etc/init.d/gm start

on each machine to install/copy the driver on that machine.

When the hardware is connected through a cable to another operating component and the

GM-1 firmware has been loaded, a green “link” LED and a yellow/amber “Lanai” LED

will illuminate on NICs and a green “link” LED will illuminate on connected ports on the

line cards. If you do not see a green “link” LED illuminated on a component (port on a

NIC or port on a switch line card), refer to the following diagnostics:

• 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 GM MCP/firmware is running, and will pulse faster when there is

more packet-sending activity (including sending acknowledge packets in reply to packets

received.) If the yellow LED is not pulsing, the GM 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_drivers script performs the following operations:

• Shuts down existing IP over Myrinet

• Unloads existing GM module (if it exists)

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

• Loads the GM module (insmod)

Important note: The /etc/init.d/gm start script does not configure the IP device. If you

wish to run IP over GM/Myrinet (ethernet emulation), you must configure the device.

(Refer to Step 4 of the installation process.)