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Cisco Bug: CSCvu59192 - DOC: Missing information in the ISL Diagnostic configuration guide

Last Modified

Jun 22, 2020

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

8.4(1)

Description (partial)

Symptom:
In the below configuration guide of the ISL Diagnostic test, we have couple of information which is not very clear and missing in the limitation of the tests. 

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/config/system-management/cisco_mds9000_system_management_config_guide_8x/configuring_interswitch_link_diagnostics.html#:~:text=Latency%20test%20measures%20the%20latency,where%20the%20timestamps%20are%20captured.&text=On%20Cisco%20MDS%20switches%2C%20the,meters%20of%20the%20cable%20length.

The guide should provide the following
1. A note that the 2 types of reflectors are mutually incompatible
2. How to check which reflector is operational. (Traffic test or latency test)
3. A brief explanation about the errors that can be seen if the two tests are configured wrongly.
4. The latency and traffic test is not reliable when DWDM is being used. The test could fail and not give proper results

Conditions:
Customer performing ISL diagnostic test on a MDS switch and reviewing the below document

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/config/system-management/cisco_mds9000_system_management_config_guide_8x/configuring_interswitch_link_diagnostics.html#:~:text=Latency%20test%20measures%20the%20latency,where%20the%20timestamps%20are%20captured.&text=On%20Cisco%20MDS%20switches%2C%20the,meters%20of%20the%20cable%20length
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