Troubleshooting guide

$ fm_switch -a <switch_name>

where <switch_name> is the DNS name or IP address for the monitoring line card in the

specific switch enclosure.

If you need to remove a switch from the database, run

$ fm_switch –d <switch_name>

If the monitoring line card has not yet been installed in the switch(es), refer to "How do I

install the monitoring line card in my Myrinet-2000 M3-E* switch?"

(

http://www.myri.com/cgi-bin/fom?file=200) or "How do I configure the monitoring line card in

the M3-CLOS-ENCL-* and/or M3-SPINE-ENCL-* switch(es)? (

http://www.myri.com/cgi-

bin/fom?file=374).

3. Run fm_db2wirelist to look for any missing hosts

As soon as the FMS database has been created, we recommend running fm_db2wirelist

to print a list of all connections in the fabric.

$ fm_db2wirelist

fm_db2wirelist reads the database of connections and prints a list of the contents of each

switch's slots and connections. Reviewing this list is a good way to notice links that have

lost connectivity.

fm_db2wirelist [ -R <fms_run> ] [ -N <db_name> ]

If a known connected port is missing from the fm_db2wirelist output, refer to the

following quick-check list:

• Is the green LED illuminated on this port?

• Is the fiber cable securely attached at both ends?

• Is the MX/GM firmware properly installed and running on all nodes (check

/var/log/messages)?

• Is there an fma process running on all hosts in the network?

• Does the output of fm_status list all connected hosts, and does it list any alerts?

• If the missing connection is a host-to-switch connection, is this host listed in the

routing table output of mx_info or gm_board_info?

4. Check the LEDs on each switch port and NIC port

After the hardware installation and the MX or GM software installation have been

successfully completed, there will be a green LED illuminated on each switch port (on

the TFT display) for each connection that is active. If not, check the power supply to the

switch, and check that the Myrinet cable is securely attached both at the switch end and at