Installation guide

Switch Fabric Module
BlackDiamond 20808 Switch Hardware Installation Guide
21
Switch Fabric Module
The XFM-1 switch fabric modules (Figure 4) provide the active switching fabric for the switch. Each
XFM-1 module provides 384 Gbps total switching capacity. Up to five XFM-1 modules can be installed
in dedicated slots at the rear of the BlackDiamond 20808 chassis, providing a total switch fabric capacity
of 2 Tbps.
Figure 4: XFM-1 Module
Switch fabric modules have internal fans that provide module cooling independent of the chassis
ventilation system. The module air intake grills have filters.
LEDs on the module front panel (Table 5) indicate basic operating conditions for the module.
I/O Modules
The following I/O modules are available for the BlackDiamond 20808 switch:
● GM-40XA and GM-40XB modules
● XM-8XB module
No configuration information is stored on the I/O modules; all configuration information is stored on
the management modules.
When a BlackDiamond 20808 switch is powered on, the software generates a default configuration for
any slots that contain I/O modules. The default configuration allows the I/O module ports to
participate in the VLAN named default. The default configuration for the I/O module is not preserved
unless you explicitly save the configuration to NVRAM.
You can configure parameters of an I/O module after it is installed, or preconfigure a slot for a certain
type of module and configuration. The preconfigured information is applied to the module after it is
inserted. If you preconfigure a slot for a specific module type and then insert a different type of module,
the inserted module reverts to its default configuration.
See the ExtremeXOS 12.2 Concepts Guide and the ExtremeXOS 12.2 Command Reference Guide for
feature-specific information related to BlackDiamond 20808 series modules.
Table 5: LEDs on the XFM Switch Fabric Module
Label/Function Color/State Meaning
STAT
Module status
Green/blinking Normal operation
Amber/blinking Configuration error, code version error, diagnostic failure, or other
severe module error
Off The module is not receiving power.
DIAG
Module diagnostics
Amber/blinking Diagnostic tests are in progress.
Amber/steady A diagnostic failure has occurred.
Off Normal operation
BD_222