Spanning Tree - Dahua PFS4218-16GT-190 Web Config Manual

Step 4 Click Save.
The port 1 and port 2 form the logical port.

4.1.6 Spanning Tree

The spanning tree protocol is the protocol of layer 2. It can eliminate the ring cycle of layer 2 by
choosing to block the redundant links in the network, and it can back up the links.
Similar to other protocols, the spanning tree protocol is updated with the development of the
network: from STP (Spanning Tree Protocol), to RSTP (Rapid Spanning Tree Protocol), and to
the latest MSTP (Multiple Spanning Tree Protocol). We introduce the features of STP, RSTP,
and MSTP, and the relationship between them progressively in this section.
4.1.6.1 Bridge Settings
There must be the root in tree-model network, and the concept of Root Bridge is introduced in
STP. There is only one root bridge in the whole network, and the root bridge changes with the
network topology change. The root bridge is not constant.
In network initialization, all devices regard itself as the root bridge, create their own
configuration BPDU (Bridge Protocol Data Unit), and send it periodically. After the network
topology is steady, only the root bridge device can send configuration BPDU, and other device
forward it.
Step 1 Select Advanced > Configuration > Spanning Tree > Bridge.
The STP Bridge Configuration is displayed. See Figure 4-61.
Figure 4-60 Static configuration (2)
Advanced Settings 43