Installation guide

Refer to Figure 4–4 to determine which jumper corresponds to which

backplane pin. The XMI backplane pin numbering is exactly the same as

the VAXBI backplane pin numbering. There are 29 possible pins that may

need jumpers on the backplane, in sections D and E. The corresponding

jumpers are denoted W1 through W30, with W9 being reserved.

The module functions that must be modiﬁed by jumper placement are the

following:

Set CI port address (mandatory)

Set Quiet Slot DELTA Time to 10 (mandatory)

In addition, you can modify the following characteristics:

Boot time

Disable arbitration

Extend header

Cluster size

Extend ACK timeout

The general procedure for installing jumpers is as follows:

1. Open the rear cabinet door.

2. Find the XMI backplane slot corresponding to the CIXCD module. The

internal cables are connected to the pins on the leftmost section of the

module as seen from the rear. The jumpers are installed on the pins of

the rightmost segment of the module.

3. Insert jumpers between backplane pins to set the desired module

parameters. Speciﬁc pins for desired parameters are described in

sections that follow.

4. Close the cabinet door.

You cannot use the default conﬁguration. You must change the Quiet Slot

DELTA Time to 10. The default conﬁguration for a system with no jumpers

installed would be:

CI Node Address = 0

Quiet Slot DELTA Time is at 7,

and must be set to 10 on all systems in the cluster

Boot Time = 1500 seconds

Normal CI Arbitration

Normal Header systems in the cluster

Cluster Size = 16

Short ACK Timeout

Connecting to a CI VAXcluster 4–7