Multiple Master SMs
Scenario That Could Yield Multiple Master SMs
A Master SM may discover another Master SM during a sweep of the subnet. This can happen when a device is hot-plugged into a subnet, connecting two subnets together (or even when just connecting a link cable between two switches or a switch and a CA or router). The two subnets are then combined into a single subnet, and there may then be two Master SMs. When a device detects that a link that was down goes to the up state, its SMA sends a SubnTrap(Notice) to its Master SM reporting the event.
Assume that two fully operational subnets are hot-connected by a link cable connecting together ports of two switches at the fringe of each of the two subnets.
After the Physical Layers of ...
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