Spanning tree MST

[vinoth13.c]

Is Revision number  and Region name is mandatory to configure ?

without this whether MST will work or not?

as per my understanding both needs to identify which its belongs to MST configuration.

thanks 

vinoth Kumar C

[Julio E. Moisa · Accepted solution]

Hi

Region is configured to prevent a misconfiguration, imagine 2 o more switches configured with the same instance but the instances have different vlan groups, so the region will be used to identify which vlan groups belong to the each instance. Note: it should never happen it should be a misconfiguration. The switches on the same region must run the same MST Parameters.

Within a region all the switches must run instance of MST that includes: 

- MST Configuration name

- Revision number 0 to 65535

- Instance to vlan mapping. 

The revision number is used like a tracker of the changes made into the region, each new change should incresase the value by one. It should match on every switch on the same region. Region and revision number must be configured always to prevent any STP problem on the network. 

Hope it is useful

:-)

[Peter Paluch]

Hi Vinoth,

In addition to Julio's response, you have asked whether it is required to configure a revision and a region name when creating a MST configuration.

Both the revision number and the region name are mandatory parts of MST region configuration. However, if you do not specify them explicitly, the switch will automatically use a revision number of 0, and an empty string as the region name. So, technically, you do not need to configure them, but they will always be present, and if you don't change them, they will be set to 0 for revision, and to an empty string for the region name by default.

Best regards,
Peter