vlans that we purposely want another device to be root

  • 6 February 2017
  • 4 replies
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Userlevel 1
We use specialty vlans in some dual router topologies that we want another device to become root. In this case we would have a certain range of vlans with one priority and another range with a different one on the same switch. The Cisco syntax would be written as such:
Switch A:
spanning-tree vlan 1-999 priority 0
spanning-tree vlan 1000-4094 priority 8192
Switch B:
spanning-tree vlan 1-999 priority 4096
spanning-tree vlan 1000-4094 priority 12288
How can we reproduce this in Cumulus?
Thanks.

4 replies

Userlevel 4
@mlukas yes, @Jason Guy does mean traditional mode bridges. And currently we don't support VLAN spanning tree priorities.
When you say "traditional bridges" you mean Cumulus's "Traditional Mode Bridges"? Or does cumulus not support setting vlan spanning-tree priorities?
Userlevel 1
That type of topology typically requires Cisco's PVST+ which is only available with traditional b...Thanks Jason!
Userlevel 3
That type of topology typically requires Cisco's PVST+ which is only available with traditional bridges. The other option is a full 802.1S (MST) implementation, which Cumulus does not currently support. The legacy multiple-root spanning-tree model for balancing network utilization is becoming less popular, with technologies like MLAG and Layer-3 to the host, becoming more appealing.

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