User`s manual

User’s Manual 39
You can also use the Command Line Interface (CLI) to manage the switch over a serial connection to the
console port or via Telnet. For more information on using the CLI, refer to Appendix A: Web and
Command Line Interface Overview.
3.1 Configuring Spanning Tree
The follow section describe using and configuring spanning tree protocols including rapid spanning tree
(RSTP) and multiple spanning trees (MSTP).
3.1.1 Spanning Tree Global Settings
Global settings apply to the entire switch.
Spanning Tree Protocol
Uses RSTP for the internal state machine, but sends only 802.1D BPDUs. This creates one spanning tree
instance for the entire network.
Rapid Spanning Tree Protocol
RSTP supports connections to either STP or RSTP nodes by monitoring the incoming protocol messages
and dynamically adjusting the type of protocol messages the RSTP node transmits, as described below:
STP Mode – If the switch receives an 802.1D BPDU (For example, STP BPDU) after a port’s migration
delay timer expires, the switch assumes it is connected to an 802.1D bridge and starts using only 802.1D
BPDUs.
RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP BPDU after the migration
delay expires, RSTP restarts the migration delay timer and begins using RSTP BPDUs on that port.