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VES-1616F-3x Series User’s Guide
101
C
H A P T E R
10
Spanning Tree Protocol
This chapter introduces the Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol
(RSTP).
10.1 STP/RSTP Overview
(R)STP detects and breaks network loops and provides backup links between switches,
bridges or routers. It allows a switch to interact with other (R)STP -compliant switches in your
network to ensure that only one path exists between any two stations on the network.
The switch uses IEEE 802.1w RSTP (Rapid Spanning Tree Protocol) that allows faster
convergence of the spanning tree than STP (while also being backwards compatible with STP-
only aware bridges). In RSTP, topology change information is directly propagated throughout
the network from the device that generates the topology change. In STP, a longer delay is
required as the device that causes a topology change first notifies the root bridge that then
notifies the network. Both RSTP and STP flush unwanted learned addresses from the filtering
database. In RSTP, the port states are Discarding, Learning, and Forwarding.
"
In this user’s guide, “STP” refers to both STP and RSTP.
10.1.1 STP Terminology
The root bridge is the base of the spanning tree; it is the bridge with the lowest identifier value
(MAC address).
Path cost is the cost of transmitting a frame onto a LAN through that port. It is assigned
according to the speed of the link to which a port is attached. The slower the media, the higher
the cost.
Table 24
STP Path Costs
LINK
SPEED
RECOMMENDED
VALUE
RECOMMENDED
RANGE
ALLOWED
RANGE
Path
Cost
4Mbps
250
100 to 1000
1 to 65535
Path
Cost
10Mbps
100
50 to 600
1 to 65535
Path
Cost
16Mbps
62
40 to 400
1 to 65535
Содержание VDSL SWITCH VES-1616F-3X
Страница 1: ...www zyxel com VES 1616F 3x Series VDSL Switch User s Guide Version 3 60 5 2007 Edition 2 ...
Страница 2: ......
Страница 7: ...Safety Warnings VES 1616F 3x Series User s Guide 7 ...
Страница 8: ...Safety Warnings VES 1616F 3x Series User s Guide 8 ...
Страница 28: ...List of Tables VES 1616F 3x Series User s Guide 28 ...
Страница 29: ...29 PART I Introduction Getting to Know Your Switch 31 Hardware Installation 35 Hardware Overview 37 ...
Страница 30: ...30 ...
Страница 34: ...Chapter 1 Getting to Know Your Switch VES 1616F 3x Series User s Guide 34 ...
Страница 42: ...Chapter 3 Hardware Overview VES 1616F 3x Series User s Guide 42 ...
Страница 43: ...43 PART II Status and Basic The Web Configurator 45 System Status and Port Statistics 53 Basic Setting 63 ...
Страница 44: ...44 ...
Страница 62: ...Chapter 5 System Status and Port Statistics VES 1616F 3x Series User s Guide 62 ...
Страница 84: ...Chapter 6 Basic Setting VES 1616F 3x Series User s Guide 84 ...
Страница 86: ...86 ...
Страница 94: ...Chapter 7 VLAN VES 1616F 3x Series User s Guide 94 Figure 33 Port Based VLAN Setup All Connected ...
Страница 106: ...Chapter 10 Spanning Tree Protocol VES 1616F 3x Series User s Guide 106 ...
Страница 120: ...Chapter 15 Port Authentication VES 1616F 3x Series User s Guide 120 ...
Страница 126: ...Chapter 17 Queuing Method VES 1616F 3x Series User s Guide 126 ...
Страница 131: ...Chapter 18 Classifier VES 1616F 3x Series User s Guide 131 Figure 51 Classifier Example ...
Страница 132: ...Chapter 18 Classifier VES 1616F 3x Series User s Guide 132 ...
Страница 138: ...Chapter 19 Policy VES 1616F 3x Series User s Guide 138 Figure 53 Policy Example ...
Страница 144: ...Chapter 20 VLAN Stacking VES 1616F 3x Series User s Guide 144 ...
Страница 155: ...Chapter 21 Multicast VES 1616F 3x Series User s Guide 155 Figure 65 MVR Group Configuration Example ...
Страница 156: ...Chapter 21 Multicast VES 1616F 3x Series User s Guide 156 ...
Страница 160: ...Chapter 22 Differentiated Services VES 1616F 3x Series User s Guide 160 ...
Страница 161: ...161 PART IV Routing Protocol Static Route 163 DHCP Relay 165 ...
Страница 162: ...162 ...
Страница 168: ...168 ...
Страница 178: ...Chapter 25 Maintenance VES 1616F 3x Series User s Guide 178 ...
Страница 192: ...Chapter 27 Diagnostic VES 1616F 3x Series User s Guide 192 ...
Страница 196: ...Chapter 28 Syslog VES 1616F 3x Series User s Guide 196 ...
Страница 202: ...Chapter 29 Cluster Management VES 1616F 3x Series User s Guide 202 ...
Страница 208: ...208 ...
Страница 242: ...Chapter 32 Introducing the Commands VES 1616F 3x Series User s Guide 242 ...
Страница 266: ...Chapter 34 IEEE 802 1Q Tagged VLAN Commands VES 1616F 3x Series User s Guide 266 ...
Страница 274: ...Chapter 35 Troubleshooting VES 1616F 3x Series User s Guide 274 ...
Страница 282: ...Chapter 36 Product Specifications VES 1616F 3x Series User s Guide 282 ...
Страница 284: ...284 ...
Страница 298: ...Appendix B Legal Information VES 1616F 3x Series User s Guide 298 ...
Страница 310: ...Index VES 1616F 3x Series User s Guide 310 ...