Port type and link type
Spanning Tree Configuration includes the following parameters to support RSTP and MSTP:
Although these parameters are configured for Spanning Tree Groups 1-128 (/cfg/l2/stp y/port x),
they only take effect when RSTP/MSTP is turned on.
A port that connects to a server or stub network is called an edge port. Therefore, ports 1-16 should have
edge enabled. Edge ports can start forwarding as soon as the link is up.
Edge ports do not take part in Spanning Tree, and should not receive BPDUs. If a port with edge enabled
does receive a BPDU, it begins STP processing until it is re-enabled.
The link type determines how the port behaves in regard to Rapid Spanning Tree. The link type
corresponds to the duplex mode of the port. A full-duplex link is point-to-point (p2p), while a half-duplex
link should be configured as shared. If you select auto as the link type, the port dynamically configures
the link type.
RSTP configuration guidelines
This section provides important information about configuring Rapid Spanning Tree Groups:
When RSTP is turned on, STP parameters apply only to STP Group 1.
When RSTP is turned on, all VLANs from STP Groups other than STP Group 1 are moved to STP
Group 1. The other STP Groups (2-128) are turned off.
RSTP configuration example
This section provides steps to configure Rapid Spanning Tree on the switch, using the Command Line
Interface (CLI) or the Browser-based Interface (BBI).
Configuring Rapid Spanning Tree (CLI example)
Configure port and VLAN membership on the switch, as described in the "Configuring ports and
VLANs (CLI example)" section in the "VLANs" chapter of this guide.
Set the Spanning Tree mode to Rapid Spanning Tree.
>> Multiple Spanning Tree# mode rstp
>> Multiple Spanning Tree# on
Apply and save the changes.
>> # apply
>> # save
(Select Multiple Spanning Tree menu)
(Set mode to Rapid Spanning Tree)
(Turn Rapid Spanning Tree on)
(Apply the configuration)
(Save the configuration)
RSTP and MSTP