Installation Guide

222 Brocade MLX Series and Brocade NetIron XMR Installation Guide
53-1004195-03
Managing switch fabric modules
Monitor/Application Image Mismatch
A version mismatch between the monitor and application image results in system failure. The Rolling Reboot feature places the line card
into the interactive or down state mode on detection of a monitor and application image version mismatch.
Line Module Configuration Deletion in Interactive Boot Mode
In this release, line module configurations can be deleted when a? module is in Interactive Boot Mode. When an existing LP module is
removed from the slot and replaced by an LP module of a different configuration, the LP module boots up to Interactive Boot Mode due
to a configuration mismatch. The LP module configuration is not allowed to be removed or updated without manual removal of the LP
module.
To avoid physically removing the LP module from the slot and deleting or updating the LP module configuration, the deletion of the LP
module configuration is only allowed if the card is in Interactive Boot Mode. The LP module needs a power cycle to return to the Up state.
On execution of the “No Module” command, the user is prompted with an option to power cycle the card.
Managing switch fabric modules
This section provides information about how to manage standard switch fabric modules and high speed switch fabric modules.
NOTE
In CLI output, standard modules are referred to as generation 1 (G1) modules, and high-speed modules are referred to as
generation 2 (G2) modules. The following interface modules are classified by the system as G2 modules: 8x10G, 100G modules.
All other interface modules such as 4-port 10G, 2-port 10G, 20-port 1G, 24-port 1G, and 48-port 1G modules are classified
by the system as G1 modules.
High speed switch fabric (HSF) modules can operate in Normal mode or Turbo mode. Standard switch fabric modules (SFM) can only
operate in Normal mode. The HSF module is classified as a G2 module and SFM module is classified as a G1 module.
When operating in Normal mode, the system uses fixed size cells across the backplane. When operating in Turbo mode, the system uses
variable size cells across the backplane. Turbo mode provides higher performance since it is a more efficient mechanism of sending cells
across the backplane.
The system selects the operating mode for switch fabric modules at startup, or when the first switch fabric or interface module is installed.
The system uses this mode for all modules that are subsequently installed. HSF modules will boot in Turbo mode only if all active
interface modules are G2 modules. In a chassis loaded with G1 and G2 modules, the HSF modules will default to Normal mode.
NOTE
If a system is operating in Turbo mode, G1 interface modules are blocked from operation. The user has to change the switch
fabric mode to Normal mode and restart the system before using the G1 interface modules.
If the system fabric mode is changed to Normal mode from Turbo mode, or vice versa, the system will not change the current operating
mode unless the chassis is reloaded.
NOTE
Changes to the switch fabric operating mode do not take effect until after a system reload.
The switch fabric modes have the following restrictions:
• The system blocks discovery of any standard switch fabric (G1) module if you have issued the system-init block-g1-sfm
command. Refer to “Blocking discovery of G1 switch fabric modules” on page 223.