Chapter 13 Spanning Tree Protocol
XGS-4728F User’s Guide
127
13.1.3 STP Port States
STP assigns five port states to eliminate packet looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate
transient loops.
13.1.4 Multiple RSTP
MRSTP (Multiple RSTP) is ZyXEL’s proprietary feature that is compatible with RSTP
and STP. With MRSTP, you can have more than one spanning tree on your Switch
and assign port(s) to each tree. Each spanning tree operates independently with
its own bridge information.
In the following example, there are two RSTP instances (MRSTP 1 and MRSTP2)
on switch A.
Figure 63
MRSTP Network Example
To set up MRSTP, activate MRSTP on the Switch and specify which port(s) belong
to which spanning tree.
Table 28
STP Port States
PORT
STATE
DESCRIPTION
Disabled
STP is disabled (default).
Blocking
Only configuration and management BPDUs are received and processed.
Listening
All BPDUs are received and processed.
Note: The listening state does not exist in RSTP.
Learning
All BPDUs are received and processed. Information frames are submitted
to the learning process but not forwarded.
Forwarding
All BPDUs are received and processed. All information frames are received
and forwarded.
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Страница 30: ...Chapter 1 Getting to Know Your Switch XGS 4728F User s Guide 30 ...
Страница 34: ...Chapter 2 Hardware Installation and Connection XGS 4728F User s Guide 34 ...
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Страница 78: ...Chapter 7 System Status and Port Statistics XGS 4728F User s Guide 78 ...
Страница 92: ...Chapter 8 Basic Setting XGS 4728F User s Guide 92 ...
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Страница 114: ...Chapter 9 VLAN XGS 4728F User s Guide 114 ...
Страница 118: ...Chapter 10 Static MAC Forward Setup XGS 4728F User s Guide 118 ...
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Страница 162: ...Chapter 17 Link Aggregation XGS 4728F User s Guide 162 ...
Страница 186: ...Chapter 21 Policy Rule XGS 4728F User s Guide 186 ...
Страница 230: ...Chapter 25 AAA XGS 4728F User s Guide 230 ...
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Страница 332: ...Chapter 38 Maintenance XGS 4728F User s Guide 332 ...
Страница 358: ...Chapter 41 Syslog XGS 4728F User s Guide 358 ...
Страница 366: ...Chapter 42 Cluster Management XGS 4728F User s Guide 366 ...
Страница 370: ...Chapter 43 MAC Table XGS 4728F User s Guide 370 ...
Страница 374: ...Chapter 44 IP Table XGS 4728F User s Guide 374 ...
Страница 378: ...Chapter 46 Routing Table XGS 4728F User s Guide 378 ...
Страница 381: ...381 PART VI Troubleshooting Product Specifications Troubleshooting 383 Product Specifications 393 ...
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Страница 402: ...Chapter 49 Product Specifications XGS 4728F User s Guide 402 ...
Страница 403: ...403 PART VII Appendices and Index IP Addresses and Subnetting 409 Legal Information 405 Index 417 ...
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Страница 408: ...Appendix A Legal Information XGS 4728F User s Guide 408 ...