Configuring And Monitoring The Switch Fabric Module - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Configuring and Monitoring the Switch Fabric Module

When you install two Switch Fabric Modules at the same time in a 6- or 9-slot chassis, the primary
module is in slot 5 and the backup is in slot 6. If you reset the module in slot 5, the module in slot 6
becomes active.
When you install two Switch Fabric Modules at the same time in a 13-slot chassis, the primary module
is in slot 7 and the backup is in slot 8. If you reset the module in slot 7, the module in slot 8 becomes
active.
When you install a Switch Fabric Module in a Catalyst 6500 series switch, the traffic is forwarded to
and from modules in one of these modes:
•
•
•
Table 43-1
Table 43-1 Switching Modes with Switch Fabric Module Installed
Modules
Between fabric-enabled modules
(no nonfabric-enabled modules
installed)
Between fabric-enabled modules
(when nonfabric-enabled
modules are also installed)
Between fabric-enabled and
nonfabric-enabled modules
Between non-fabric-enabled
modules
Configuring and Monitoring the Switch Fabric Module
The Switch Fabric Module does not require any user configuration but supports a number of show
commands for monitoring purposes. A fully automated startup sequence brings the module online and
runs the connectivity diagnostics on the ports.
From the supervisor engine, you can reset the module using the reset module command, disable and
enable the module using the set module enable | disable command, and power it down using the set
module powerdown module command.
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
43-2
Flow-through mode—Data passes between the local bus and the supervisor engine bus. This mode
is used for traffic to or from nonfabric-enabled modules.
Truncated mode—If there are at least two fabric-enabled modules installed in a system with both
fabric-enabled and nonfabric-enabled modules, traffic between the fabric-enabled modules is
forwarded in truncated mode. In this mode, only the truncated data (the first 64 bytes of the frame)
is sent over the switch fabric channel if both the destination and the source are fabric-enabled
modules. If either the source or destination is a nonfabric-enabled module, the data goes through the
switch fabric channel and the data bus. The Switch Fabric Module does not get involved when traffic
is forwarded between nonfabric-enabled modules.
Compact mode—A compact version of the DBus header is forwarded over the switch fabric channel,
delivering the best possible switching rate. Nonfabric-enabled modules do not support the compact
mode and generate cyclic redundancy check (CRC) errors if they receive frames in compact mode. This
mode is used only when no nonfabric-enabled modules are installed in the chassis.
shows the switch modes used with fabric-enabled and nonfabric-enabled modules installed.
Chapter 43
Switching Modes
Compact
Truncated
Flow-through
Flow-through
Configuring the Switch Fabric Modules
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