l Port status
– STP port state
Table 8-1 shows the port status of an STP-capable port.
Table 8-1 STP port state
Port state Purpose Description
Forwardin
g
The port in the Forwarding state
forwards not only user traffic but also
BPDUs.
Only the root port and
designated port can enter the
Forwarding state.
Learning When a port is in the Learning state, a
device creates a MAC address table
based on the received user traffic but
does not forward user traffic.
This is a transition state,
which is designed to prevent
temporary loops.
Listening When a port is in the Listening state, the
root bridge, root port, and designated
port are to be selected.
This is a transition state.
Blocking The port in the Blocking state receives
and forwards only BPDUs but does not
forward user traffic.
This is the final state of a
blocked port.
Disabled The port in the Disabled state forwards
neither BPDUs nor user traffic.
The port is Down.
– RSTP port state
Table 8-2 shows the port status of an RSTP-capable port.
Table 8-2 RSTP port state
Port state
Description
Forwarding A port in the Forwarding state can send and receive BPDUs as
well as forward user traffic.
Learning This is a transition state. A port in the Learning state learns
MAC addresses from user traffic to construct a MAC address
table.
In the Learning state, the port can send and receive BPDUs, but
cannot forward user traffic.
Discarding A port in the Discarding state can only receive BPDUs.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 8 STP/RSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
384
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