Cabletron Systems 9C106 Installation Guide download pdf (Page 26)

Operation

3-4

System Management Buses

There are two management channels within the SmartSwitch 9500 system:

¥ SMB-1

¥ SMB-10

These buses provide out-of-band management and inter-module management

communication.

SMB-1 Bus

The SMB-1 is a 1 Mbps management bus located within the SmartSwitch 9500

chassis. This bus is used by all diagnostic controllers in the system, including the

following:

¥ Connectivity modules

¥ Power supply modules

¥ The environmental module

The SMB-1 transports inter-chassis information between system components,

such as power and environmental information, as well as diagnostic messages.

Periodic loop-back tests are performed by all modules that share this bus to

ensure the validity of SMB-1. In the event a failure is detected on SMB-1, the SMB-

10 may be used as an alternate communication channel.

SMB-10 Bus

The SMB-10 is a 10 Mbps management bus located within the SmartSwitch 9500

chassis, which is also used for inter-chassis communication of modules, as well as

serving as an out-of-band management channel into the SmartSwitch 9500. The

SMB-10 is externalized from the chassis via an optional Ethernet Port Interface

Module (EPIM) located on the front of the environmental module. Through an

EPIM connection, full SNMP management of the SmartSwitch 9500 is available

out-of-band from user data. Modules that share the SMB-10 bus periodically send

out loopback packets to ensure the validity of the SMB-10. In the event a fault is

detected on the SMB-10, the SMB-1 can be used as an alternate communication

channel by the modules.

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Cabletron Systems 9C106 Installation Guide Page 26