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Chapter 3 Avaya M770 Hub Components
12 Avaya M770 User’s Guide
The M-SPV/M-SPX Supervisor Module
This 9U module is essential for the correct functioning of the Avaya M770. The
module is located in the rear of the Avaya M770 (see Figure 3.2). Although the hub
has full functionality with only one agent, it is recommended to install an additional
module as a backup. The agent has the following key functions:
• The M-SPX supports Inter-Domain Switching (IDS) for combining the two
Avaya M770 X-Domains (not available in the M-SPV). Connecting the domains
doubles the available port count in a single switch. The M-SPX module can
operate in two modes with IDS on or IDS off.
• SNMP management
• Frame Switch arbitration
• Monitoring of Avaya M770 sub-systems, including:
— Power supplies
— Fans and temperature
— Informing the user and hub’s front panel LEDs of sub-system status
• Clock generation.
For more detailed information about the M-SPV/M-SPX please refer to the M-SPV
and M-SPX Installation Guides.
Caution: Do not mix M-SPV and M-SPX modules in the same hub.
Communication with the M-SPV/M-SPX
The M-SPX enables the SNMP agent entity of the Meritage 1400 to be accessed by
the Network Management Station (NMS) through its two sideband management
interfaces. Sideband communication is carried out through one of the auto-
negotiation 10/100M Ethernet sideband ports on the front panel of the hub, to
which you can connect the NMS. An additional interface for setup purposes is the
RS-232 Console connector on the hub’s front panel, to which a terminal or modem
can be connected.
Communication with Internal Management
The M-SPX has two additional SNMP communication links, used for internal
management communication:
• An Ethernet Management Bus (EMB) to communicate with all DomainX (12U)
modules (agents and sub-agents) in the hub.
• An Ethernet bus which communicates with NMA-R* agents, to support Legacy
hub (6U) modules.