Table of Contents
Advertisement
20 Description of the Ring Protocol
20.5 Multi-fault monitoring functionality for the Ring Protocol
20.5.1 Overview
The Multi-fault monitoring functionality monitors multi-faults for shared link monitoring rings
on multi-ring configurations with shared links, and switches paths to shared link
non-monitoring rings when a multi-fault is detected. Here, the shared link non-monitoring
ring used for path switching is called a backup ring.
The targets of detection by the multi-fault monitoring functionality are shared link faults,
other link faults within shared link monitoring rings, and switch faults accompanying link
faults.
The following shows an example of a fault on a shared link monitoring ring, as well as the
combination of faults that can be detected by the multi-fault monitoring functionality.
Note that the Switch supports only transit nodes (not including terminal nodes).
Figure 20-19 Example of a fault on a shared link monitoring ring
Table 20-4 Combinations of faults that can be detected by the multi-fault monitoring
Failure type
Link fault
Switch fault
372
functionality
Detectable combinations
Link fault 1 (shared link fault)
Link fault 1 (shared link fault)
Link fault 1 (shared link fault)
Switch fault 1 (shared node fault) only
Switch fault 4 (shared node fault) only
Switch fault 2 (transit node fault)
Switch fault 3 (transit node fault)
Link fault 2 (other link fault)
Link fault 3 (other link fault)
Link fault 4 (other link fault)
Link fault 1 (shared link fault)
Link fault 1 (shared link fault)
Advertisement
Table of Contents
