ZyXEL Communications NetAtlas, User Manual

Page: 176 / 340

Chapter 14 Switch Configuration
NetAtlas EPON Manager User’s Guide
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14.5 STP
(Rapid) Spanning Tree Protocol ((R)STP) detects and breaks network loops and
provides backup links between switches, bridges or routers. It allows a device to
interact with other (R)STP-aware devices in your network to ensure that only one
path exists between any two stations on the network. Refer to the user’s guide
that comes with your switch for more information.
14.5.1 Multiple RSTP
Multiple RSTP (MRSTP) is ZyXEL’s proprietary feature that is compatible with RSTP
and STP. With MRSTP, you can have more than one spanning tree on your EMS and
assign port(s) to each tree. Each spanning tree operates independently with its
own bridge information.
14.5.2 Multiple STP
Multiple Spanning Tree Protocol (MSTP, IEEE 802.1s) is backward compatible with
STP/RSTP and addresses the limitations of existing spanning tree protocols (STP
and RSTP) in networks to include the following features:
• One Common and Internal Spanning Tree (CIST) that represents the entire
network’s connectivity.
• Grouping of multiple bridges (or switching devices) into regions that appear as
one single bridge on the network.
• A VLAN can be mapped to a specific Multiple Spanning Tree Instance (MSTI).
MSTI allows multiple VLANs to use the same spanning tree.
• Load-balancing is possible as traffic from different VLANs can use distinct paths
in a region.
14.5.3 STP Configuration
Use the STP screen to configure STP settings on the switch.
Copy to... Click the Copy to.. button to copy the configuration from the device
that you are currently configuring to the port(s) on the same device or
the port(s) on other device(s) of the same model.
Close Click Close to exit this screen.
Table 85 Switch Configuration > Broadcast Storm Control (continued)
LABEL DESCRIPTION