User manual

C HAPTER 8 | Spanning Tree Algorithm
Displaying Interface Settings for STA
– 116 –
ES-2000 Series
Figure 60: Configuring Interface Settings for STA
DISPLAYING INTERFACE SETTINGS FOR STA
Use the Spanning Tree > STA (Configure Interface - Show Information)
page to display the current status of ports or trunks in the Spanning Tree.
PARAMETERS
These parameters are displayed:
◆ Spanning Tree – Shows if STA has been enabled on this interface.
◆ STA Status – Displays current state of this port within the Spanning
Tree:
■
Discarding - Port receives STA configuration messages, but does
not forward packets.
■
Learning - Port has transmitted configuration messages for an
interval set by the Forward Delay parameter without receiving
contradictory information. Port address table is cleared, and the
port begins learning addresses.
■
Forwarding - Port forwards packets, and continues learning
addresses.
The rules defining port status are:
■
A port on a network segment with no other STA compliant bridging
device is always forwarding.
■
If two ports of a switch are connected to the same segment and
there is no other STA device attached to this segment, the port with
the smaller ID forwards packets and the other is discarding.
■
All ports are discarding when the switch is booted, then some of
them change state to learning, and then to forwarding.