Community SONiC 202511 Can't create MST Instance

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Johnny Wong

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Jun 18, 2026, 12:22:08 PM (7 days ago) Jun 18
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 sudo config spanning-tree enable

admin@sonic:~$ sudo config spanning-tree mst
Usage: config spanning-tree mst [OPTIONS] COMMAND [ARGS]...

  Configure MSTP region, instance, show, clear & debug commands

Options:
  -?, -h, --help  Show this message and exit.

Commands:
  instance     Configure MSTP instance settings
  region-name  Configure MSTP region name
  revision     Configure STP global revision number

admin@sonic:~$ sudo config spanning-tree mst instance ?
Usage: config spanning-tree mst instance [OPTIONS] COMMAND [ARGS]...

  Configure MSTP instance settings

Options:
  -?, -h, --help  Show this message and exit.

Commands:
  interface  Configure MSTP instance interface settings
  priority   Configure bridge priority for an MST instance.
  vlan       VLAN to instance mapping for MST.


tried every one of those commands switch and keep saying.

admin@sonic:~$ sudo config spanning-tree mst instance vlan add 1 10
Usage: config spanning-tree mst instance vlan add [OPTIONS] <instance-id>
                                                  <vlan-id>
Try 'config spanning-tree mst instance vlan add -h' for help.

Error: MST instance 1 does not exist. Please create it first.
admin@sonic:~$

I don't see any switches to actually create an instance.

Anyone worked on MSTP??




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