3Com 4007, Implementation Manual, Page: 41 / 684

System Architecture
41
Options The Switch 4007 offers the following options for high device availability:
■
You can install a second Management Module for redundant
management and chassis controller functions
■
The switch provides intelligent N+1 power and environmental
management systems. See the
Switch 4007 Getting Started Guide
.
Order of Installation
Activities
3Com recommends that you install and configure Switch 4007 items in
the following order:
1
Chassis components such as power supplies and fan trays (unless they
were already installed at the factory)
2 Management modules (unless they were already installed at the factory)
3 Switch fabric module (unless it was already installed at the factory)
4 LAN switching modules (unless they were already installed at the factory)
All Switch 4007 modules support hot-swap functionality so that the
system can respond to dynamic changes.
For installation procedures, as well as restrictions and recommendations
for module placement in the chassis, see the
Switch 4007 Getting Started
Guide or the appropriate module Quick Start Guide . For module software
compatibility information, see the Switch 4007 Release Notes .
System Architecture
The Switch 4007 system uses separate channels for network traffic and
management traffic:
■
A separate 10 Mbps management LAN (MLAN) carries management
traffic to and from the EME, which acts as the single point of contact
for all management traffic in the chassis. For example, an SNMP
request to a certain module is first received by the EME and then
communicated by proxy from the EME to the module.
■
A series of channels on the chassis backplane carry network traffic.
These channels radiate from the switch fabric module slot to every
other switching module slot in the chassis. The ports on the rear of an
installed module connect it with the backplane. LAN interface
modules pass data through the backplane to the switch fabric
module. The switch fabric module may then direct the data to the
backplane to other modules in the chassis (which may then direct it
out their front panel ports) or it may direct it through one of its front
panel ports (to another device).