STP Configuration
the upstream has begun forwarding data.
The conditions for rapid state transition of the designated port are:
ï‚· The port is an Edge port that does not connect with any switch directly or indirectly. If
the designated port is an edge port, it can switch to forwarding state directly without
immediately forwarding data.
ï‚· The port is connected with the point-to-point link, that is, it is the master port in
aggregation ports or full duplex port. It is feasible to configure a point-to-point
connection. However, errors may occur and therefore this configuration is not
recommended. If the designated port is connected with the point-to-point link, it can
enter the forwarding state right after handshaking with the downstream switch and
receiving the response.
The switch that uses RSTP is compatible with the one using STP. Both protocol packets
can be identified by the switch running RSTP and used in spanning tree calculation.
 Note:
RSTP is the protocol of single spanning tree. A switching network only has one
spanning tree. To guarantee the normal communication inside a VLAN, the devices
of a VLAN shall have routes to one another on the Spanning Tree, otherwise, the
communication inside the VLAN will be affected if some links inside a VLAN are
blocked.
For some VLAN that cannot be arranged along the spanning tree paths for some
special requirements, you have to disable RSTP on the switch port corresponding to
the VLAN.
21.4 Configure RSTP
21.4.1 RSTP Configuration Task List
Table 21-5 RSTP Configuration Task List
Configure STP bridge priority
Configure Hello-packet sending interval
Configure STP forward-delay
Configure STP port priority
Configure STP point-to-point mode
Configure STP transit limit
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