Gigabit Ethernet Switch Fabric Modules; Redundant Operation In The 8-Slot Chassis - 3Com Switch 4007R Getting Started Manual

18 C 2: U S
HAPTER SING
blank faceplate. You usually install the first switch
fabric module in slot 7.

Gigabit Ethernet Switch Fabric Modules

The following Gigabit Ethernet switch fabric modules
operate in the Switch 4007R:
The Gigabit Ethernet (GEN) Switch Fabric Module
I
(Model Number 3CB9FG24T) is a central
backplane aggregator for the Switch 4007R. The
GEN Switch Fabric Module has 24 non-blocking
Gigabit Ethernet ports that connect to the chassis
backplane to provide high-speed, low-latency
connectivity between Switch 4007R interface
modules.
The 9-port Gigabit Ethernet Switch Fabric Module
I
(Model Number 3CB9FG9) is a switch fabric
module that is optimized for the Switch 4007R
8-slot chassis. The 9-port Gigabit Ethernet Switch
Fabric Module has six non-blocking Gigabit
Ethernet ports that connect directly to the chassis
backplane to provide high-speed, low-latency
connectivity between Switch 4007R interface
modules. It also features three Gigabit Interface
Connector (GBIC) interface ports located on the
front panel that accept optional GBIC transceivers.
These GBIC transceivers provide Gigabit Ethernet
downlinks into the chassis.

Redundant Operation in the 8-slot Chassis

You can install two switch fabric modules in an 8-slot
chassis to provide redundancy for the Switch 4007R.
The secondary (standby) switch fabric module mirrors
4007R M
WITCH ODULES
all configuration and operation parameters of the
primary (active) switch fabric module. If a problem
occurs with the primary module, the system software
immediately switches to the secondary module,
keeping the network up and running.
A switch fabric module becomes the primary switch
under the following conditions:
It is the only switch fabric module in the chassis.
I
It has a lower slot number, and the other switch
I
fabric module is not primary or is in a primary
transition state.
The original primary switch fabric module fails.
I
A second switch fabric module becomes the
secondary switch under the following conditions:
The other switch fabric module is already the
I
primary switch.
The other switch fabric module is installed in the
I
lower slot of the chassis.