Pilz PSSnet SHL 8T MRP - Manual (Page 68)

Rapid Spanning Tree
68
4.6 The Rapid Spanning Tree
Protocol
PSSnet SHL - Redundancy Configuration
Pilz GmbH & Co. KG, Felix- Wankel Str. 2, 73760 Ostfildern
4.6.2 Port states
Depending on the tree structure and the state of the selected connection
paths, the RSTP assigns the ports their states.
Meaning of the RSTP port states:
X Disabled = port does not belong to the active topology
X Discarding = no address learning in FDB and no data traffic apart from
sending and receiving
X Learning = address learning active (FDB) and no data traffic apart from
BPDUs
X Forwarding = address learning active (FDB) and sending and receiving
active from all frames (not only BPDUs)
STP port state Administrative
bridge port
state MAC
operational RSTP
Port state Active topology
(port role)
DISABLED Disabled FALSE Discarding* Excluded (disabled)
DISABLED Enabled FALSE Discarding* Excluded (disabled)
BLOCKING Enabled TRUE Discarding** Excluded (alternate, backup)
LISTENING Enabled TRUE Discarding** Included (root, designated)
LEARNING Enabled TRUE Learning Included (root, designated)
FORWARDING Enabled TRUE Forwarding Included (root, designated)
Table 11: Relationship between port state values in STP and RSTP.
* the dot1d MIB shows “Disabled”
** the dot1d MIB shows “Blocked”