Break the ring topology of a stack

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Starting from the cable connecting to the port of a larger Stack ID on the master switch, the [(n/2)+1]th cable is the loop-breaking cable, to which the ports are connected are blocked.
In (n/2)+1, n indicates the number of switches in the stack. The value must be an integer; if not, round it off.
For example, if a stack consists of four switches, n is equal to 4. (n/2) + 1 = 3. Starting from the cable connecting to the Stack 2 port on the master switch DUT 1, the third cable is the loop-breaking cable. That is, the Stack 1 port on Switch 4 and the Stack 2 port on Switch 2 are blocked.

Other related questions:
Unexpected breaking down of S series switch
If a switch stopping responding during operating, upgrade the switch or install the related patch. If the fault persists, collect diagnosis information and contact Huawei technical support at e_online@huawei.com.

Ring network protection schemes that are supported by devices
Common ring protection schemes include ODUk SNCP and ODUk SPRing protection. ODUk SNCP protects services on line boards and services carried over OCh fibers using the dual feeding and selective receiving function of electrical-layer cross-connections. ODUk SPRing protection mainly applies to a ring network carrying distributed services. This protection scheme uses two different ODUk channels to achieve the shared protection of multiple channels of services among all sites.

How to configure distinctive ringing
Method of configuring distinctive ringing: For details, see Configuration > Feature Guide > Voice Service > Distinctive Ring Tone in the product documentation .

How to configure service rights for softco 9500 Simultaneous Ringing and Sequential Ringing service?
Using commands: config modify subscriber dn [subpbxno <0-251>] operatenewservice add newservicerights ringservice

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