Alaxala AX2200S Series Configuration Manual page 320

19 Spanning Tree Protocol
Status
Blocking
Listening
Learning
Forwarding
Legend n/a: Not applicable
Table 19-4 Status transitions for Rapid PVST+ and Rapid STP (Single Spanning Tree)
Status
Disable
Discarding
Learning
Forwarding
Legend n/a: Not applicable
With Rapid PVST+ and Rapid STP, the Discarding and Learning statuses are skipped by
BPDU reception from the partner switch. This enables high-speed topology changes.
When using a rapid Spanning Tree Protocol, set it according to the conditions described
below. If these conditions are not satisfied, discarding and learning might not be skipped,
and high-speed status transitions might not be performed.

The entire topology is built using the same protocol (Rapid PVST+ or Rapid STP).
For details about reciprocal connections for Rapid PVST+ and Rapid STP,
see 19.3.2 PVST+ for access ports.

Point-to-Point connections are used between switches running for the Spanning
Tree Protocol.

PortFast is set on ports not connected to switches running for the Spanning Tree
Protocol.
298
Status overview
Status in which communication is not possible. In this
status, MAC address learning is not performed. This is the
status after link-up or of ports after topology stabilization
and blocking.
Status in which communication is not possible. In this
status, MAC address learning is not performed. This is the
duration until the topology stabilizes before the
corresponding port is learned.
Status in which communication is not possible. In this case,
however, MAC address learning is performed. This is the
duration for which MAC address learning is performed
before the corresponding port transitions to Forwarding.
Status in which communication is possible. In this case, the
topology is stable.
Status overview
Status in which a port cannot be used. This transitions to
Discarding as soon as the port becomes available.
Status in which communication is not possible. In this
status, MAC address learning is not performed. This is the
duration until the topology stabilizes before the
corresponding port is learned.
Status in which communication is not possible. In this case,
however, MAC address learning is performed. This is the
duration for which MAC address learning is performed
before the corresponding port transitions to Forwarding.
Status in which communication is possible. In this case, the
topology is stable.
Transition to the next
status
20 seconds (variable) or
until BPDU reception
15 seconds (variable)
15 seconds (variable)
n/a
Transition to the next
status
n/a
Omitted or 15 seconds
(variable)
Omitted or 15 seconds
(variable)
n/a