User Guide

37-3
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
78-14099-04
Chapter 37 Configuring the Switch Fabric Module
Configuring the Switch Fabric Module
• Truncated mode—The switch uses this mode for traffic between fabric-enabled modules when there
are both fabric-enabled and nonfabric-enabled modules installed. In this mode, the switch sends a
truncated version of the traffic (the first 64 bytes of the frame) over the switch fabric channel.
• Bus mode—The switch uses this mode for traffic between nonfabric-enabled modules and for traffic
between a nonfabric-enabled module and a fabric-enabled module. In this mode, all traffic passes
between the local bus and the supervisor engine bus.
Table 37-1 shows the switch modes used with fabric-enabled and nonfabric-enabled modules installed.
Configuring the Switch Fabric Module
These section describe configuring the Switch Fabric Module:
• Configuring the Switching Mode, page 37-3
• Configuring Fabric-Required Mode, page 37-4
• Configuring an LCD Message, page 37-5
Note With Release 12.1(11b)E and later releases, 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
Note The commands in this section are supported only with Release 12.1(11b)E and later releases.
To configure the switching mode, perform this task:
Table 37-1 Switching Modes with Switch Fabric Module Installed
Modules Switching Modes
Between fabric-enabled modules (when no nonfabric-enabled modules are
installed)
Compact
1
1. In show commands, displayed as dcef mode for fabric-enabled modules with DFC installed; displayed as fabric mode for
other fabric-enabled modules.
Between fabric-enabled modules (when nonfabric-enabled modules are also
installed)
Truncated
2
2. Displayed as fabric mode in show commands.
Between fabric-enabled and nonfabric-enabled modules Bus
Between non-fabric-enabled modules Bus
Command Purpose
Router(config)# [no] fabric switching-mode allow
{bus-mode | {truncated [{threshold [number]}]}
Configures the switching mode.