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Root bridge election (MSTP) is NOT working between C5 and Summit X440-G2

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Information

 
TitleRoot bridge election (MSTP) is NOT working between C5 and Summit X440-G2
Symptoms
EXOS devices see the EOS devices as root bridge for CIST but not root bridge for MSTI's
Environment
  • SecureStack
  • Summit X440-G2
  • EOS firmware 06.81.08.0005
  • EXOS firmware 22.2.1.5patch1-4
  • MSTP
  • 802.1s
Cause
The issue can arise during the editing (cut and paste) of the MST configuration name.
The following line added on the Securestack is shown as below.

set spantree mstcfgid cfgname region1 rev 1

It will then be displayed in the STP configuration as follows:-

set spantree mstcfgid cfgname "region1" rev 1

Note with quotations marks.
Resolution
The solution is to enter the MST configuration names on the SecureStack and X440-G2 manually (do not cut and paste) or edit out the quotation marks.
Additional notes

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