Blade ICE G8000 - Manual (Page 81)

RackSwitch G8000 Application Guide
Chapter 5: Spanning Tree „ 81 BMD00041, November 2008
Port Type and Link Type
Spanning Tree configuration includes the following parameters to support
RSTP and MSTP: edge port and link type.
Edge Port
A port that does not connect to a bridge is called an edge port. 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. A port with Edge
enabled is intended to be connected directly to a host. If a port with edge enabled does receive
a BPDU, it immediately begins working as a normal port, and participates in Spanning Tree.
Link Type
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, STG 2-128 are turned off.
„
When RSTP is turned on, all VLANs are moved to Spanning Tree Group 1.