6-4
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 6 Configuring the Supervisor Engine 2 and the Switch Fabric Module
Configuring the Switch Fabric Module
• Configuring Fabric-Required Mode, page 6-4
• Configuring an LCD Message, page 6-5
Note When you are in configuration mode you can enter EXEC mode-level commands by entering the do
keyword before the EXEC mode-level command.
Configuring the Switching Mode
To configure the switching mode, perform this task:
When configuring the switching mode, note the following information:
• To allow use of nonfabric-enabled modules or to allow fabric-enabled modules to use bus mode,
enter the fabric switching-mode allow bus-mode command.
• To prevent use of nonfabric-enabled modules or to prevent fabric-enabled modules from using bus
mode, enter the no fabric switching-mode allow bus-mode command.
Caution When you enter the no fabric switching-mode allow bus-mode command, power is removed from any
nonfabric-enabled modules installed in the router.
• To allow fabric-enabled modules to use truncated mode, enter the fabric switching-mode allow
truncated command.
• To prevent fabric-enabled modules from using truncated mode, enter the no fabric switching-mode
allow truncated command.
• To configure how many fabric-enabled modules must be installed before they use truncated mode
instead of bus mode, enter the fabric switching-mode allow truncated threshold number command.
• To return to the default truncated-mode threshold, enter the no fabric switching-mode allow
truncated threshold command.
Configuring Fabric-Required Mode
To configure fabric-required mode, which prevents all switching modules from operating unless there is
a Switch Fabric Module installed, perform this task:
Command Purpose
Router(config)# [no] fabric switching-mode allow
{bus-mode | {truncated [{threshold [
number
]}]}
Configures the switching mode.
Command Purpose
Router(config)# fabric required
Configures fabric-required mode, which prevents switching
modules from operating without a switch fabric module.
Router(config)# no fabric required
Clears fabric-required mode.