| 摘要 |
<p>A fault-tolerant module (10) and method for a networking chassis provides a primary path (20) for transmission of system management information and a secondary path (26) for transmission of system management information in the event of failure of the primary path. The primary path includes a first microprocessor controller (22), coupled between the first system management bus and a processor (CPU) (14) located on the networking module. The secondary path includes a second microprocessor controller (28) system and a dual-port memory (30). The second controller system is coupled to the second system management bus and to a first port of the memory, and a second port of the memory is coupled to the CPU. The dual-port memory thus provides an interface between the CPU and the second microprocessor controller system, thus providing isolation and allowing the memory to be accessible by either processor. Environmental information and module identification information are stored in the memory; in the event of failure of the primary path, the information can be accessed and transmitted over the backup transmission path.</p> |
