STP Instances in C9300

[ricardoborlone1]

Hi there,

Does anyone know how many simultaneous STP  instances does a C9300 (network essentials) support?

A redundant star goes from Core (C9300) to 10 distribution cabinets in a Plant Floor (IE3000 most likely).

Thanks for your support and Help.

Ricardo

[luis_cordova]

Hi @ricardoborlone1 ,

Check this guide: 

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-5/configuration_guide/lyr2_lyr3/b_165_lyr2_lyr3_9300_cg/b_165_lyr2_lyr3_9300_9500_cg_chapter_00.html

Supported Spanning-Tree Instances

In PVST+ or Rapid PVST+ mode, the device or device stack supports up to 128 spanning-tree instances.

In MSTP mode, the device or device stack supports up to 65 MST instances. The number of VLANs that can be mapped to a particular MST instance is unlimited.

Regards

[ricardoborlone1]

Thanks a lot

[rishrapsody1]

That should be 128.
If this number is a problem, you can go with MST

[ricardoborlone1]

Thank you very much,