Myrinet System Interconnect Guide

Replacing components

Several components can be replaced in the Myrinet system interconnect: This

chapter presents the following instructions relating to the replaceable components:

• Installing a monitoring line card (Section 5.1).

• Removing and installing an 8-port line card (Section 5.2).

• Replacing a fan tray (Section 5.3)

• Replacing a chassis (Section 5.4)

5.1 Installing a monitoring line card

To ins tall a monitoring line card in your Myrinet sys tem interconnect switch,

do the following:

1. Read the MAC address from the faceplate of the monitoring line card, and

configuration file (/etc/dhcpd.conf) on the DHCP se rver on the local

network. The D H CP serv er will then serve this static IP addres s to the

monitoring line card when it boots and asks for it.

The MAC address is a group of 6 hexadecimal numbers separated by colons,

and should begin with 00:60:dd:7f:

2. Before sliding the monitoring line card into the top slot of the Myrinet

interconnect, connect at least the firstethernetporttotheLAN.Forhigh

availability, you can also connect the second ethernet port.

You can only install the monitoring line card in the top slot of your Myrinet

interconnect. The ethernet ports on the monitoring line card are 10base-T.

3. When the monitoring line card is locked in positio n, a green LED will

illuminate, and the LEDs for the connected ethernet ports will light up. The

monitoring line card will immediatelystarttobroadcastDHCPrequests.

4. When th e monitorin g line ca rd has received its IP address, it is reachable. You

can ping the card or open a Web browser to it.

To determine the IP address that was assigned to the monitoring line card,

look at the file /var/state/dhcp/dhcpd.leases on your DHCP server.

Each time a mo nitoring line card is powered on, it sks for its IP address (and

netmask) via DHCP. You can specify a gateway with the DHCP "routers"

option. Theleasetimeis1day.

_________________________ Note _________________________

You must have DHCP to install the monitoring line card or to run the

switch monitoring tools. You must install the monitoring line card prior

to buil di n g the switch m onitoring t ools.

Replacing components 5-1