To verify loop-protection functionality on Distribution switch

Latest reply: Dec 29, 2018 15:47:40 135 2 7 0

Test Case Objective : To verify loop-protection functionality on Distribution switch  




Precondition :

1. Verify loop-protection is running on the switch


2. The test shall take an existing fiber connection to perform the test




Procedural Description :

1. Ensure loop-protection is enabled on an interface on  device uplink 


2. Connect the TX (transmit) end fiber cable to the same interface RX (receive) end, to create a loop connection


3. Observe the interface status on by console connection


4. Loop-protection shall be able to detect this error and put the port into disable state




Input Data :

1. Issue the command “display stp brief” to verify the loop protection status before the test


2. When the connection loop is form, issue the command “ display stp interface interface-type interface-number” to check the status. 


3. When the port receives BPDUs again, the port status changes to Forwarding.



Expected Result : Loop-protection feature is able to detect incorrect cable connection, and suspend the interface


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  • convention:

Created Dec 29, 2018 14:48:27 Helpful(0) Helpful(0)

When the connection loop is form, issue the command “ display stp interface interface-type interface-number” to check the status.
  • x
  • convention:

Created Dec 29, 2018 15:47:40 Helpful(0) Helpful(0)

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  • x
  • convention:

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