Specifying the time interval between BPDU transmissions


spanning-tree hello-time 1..10

If MSTP is running and the switch is operating as the CIST (Common and Internal Spanning Tree) root for your network, this command specifies the time in seconds between transmissions of BPDUs for all ports on the switch configured with the Global option (the default). This parameter applies in MSTP, RSTP, and STP modes.

During MSTP operation, you can override this global setting on a per-port basis with this command: spanning-tree port-list hello-time 1..10 .

Default: 2 seconds.