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C
HAPTER
8
| Spanning Tree Algorithm
Configuring Interface Settings for STA
– 220 –
An interface cannot function as an edge port under the following
conditions:
If spanning tree mode is set to STP (
), edge-port mode
cannot automatically transition to operational edge-port state using
the automatic setting.
If loopback detection is enabled (
) and a loopback BPDU is
detected, the interface cannot function as an edge port until the
loopback state is released.
If an interface is in forwarding state and its role changes, the
interface cannot continue to function as an edge port even if the
edge delay time has expired.
If the port does not receive any BPDUs after the edge delay timer
expires, its role changes to designated port and it immediately
"Displaying Interface Settings for STA"
).
BPDU Guard
– This feature protects edge ports from receiving BPDUs.
It prevents loops by shutting down an edge port when a BPDU is
received instead of putting it into the spanning tree discarding state. In
a valid configuration, configured edge ports should not receive BPDUs.
If an edge port receives a BPDU an invalid configuration exists, such as
a connection to an unauthorized device. The BPDU guard feature
provides a secure response to invalid configurations because an
administrator must manually enable the port. (Default: Disabled)
BPDU Filter
– BPDU filtering allows you to avoid transmitting BPDUs
on configured edge ports that are connected to end nodes. By default,
STA sends BPDUs to all ports regardless of whether administrative edge
is enabled on a port. BDPU filtering is configured on a per-port basis.
(Default: Disabled)
Migration
– If at any time the switch detects STP BPDUs, including
Configuration or Topology Change Notification BPDUs, it will
automatically set the selected interface to forced STP-compatible
mode. However, you can also use the Protocol Migration button to
manually re-check the appropriate BPDU format (RSTP or STP-
compatible) to send on the selected interfaces. (Default: Disabled)
W
EB
I
NTERFACE
To configure interface settings for STA:
1.
Click Spanning Tree, STA.
2.
Select Configure Interface from the Step list.
3.
Select Configure from the Action list.
4.
Modify any of the required attributes.
5.
Click Apply.
Содержание DG-FS4526E
Страница 4: ...ABOUT THIS GUIDE 4...
Страница 34: ...CONTENTS 34...
Страница 50: ...TABLES 50...
Страница 52: ...SECTION I Getting Started 52...
Страница 62: ...CHAPTER 1 Introduction System Defaults 62...
Страница 80: ...CHAPTER 2 Initial Switch Configuration Managing System Files 80...
Страница 82: ...SECTION II Web Configuration 82...
Страница 100: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 100...
Страница 128: ...CHAPTER 4 Basic Management Tasks Resetting the System 128...
Страница 166: ...CHAPTER 5 Interface Configuration VLAN Trunking 166...
Страница 198: ...CHAPTER 6 VLAN Configuration Configuring VLAN Mirroring 198...
Страница 516: ...CHAPTER 17 IP Services Displaying the DNS Cache 516...
Страница 562: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 562...
Страница 652: ...CHAPTER 22 SNMP Commands 652...
Страница 660: ...CHAPTER 23 Remote Monitoring Commands 660...
Страница 714: ...CHAPTER 24 Authentication Commands Management IP Filter 714...
Страница 802: ...CHAPTER 27 Interface Commands 802...
Страница 824: ...CHAPTER 29 Port Mirroring Commands RSPAN Mirroring Commands 824...
Страница 846: ...CHAPTER 32 Address Table Commands 846...
Страница 874: ...CHAPTER 33 Spanning Tree Commands 874...
Страница 886: ...CHAPTER 34 ERPS Commands 886...
Страница 928: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 928...
Страница 942: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 942...
Страница 998: ...CHAPTER 38 Multicast Filtering Commands Multicast VLAN Registration 998...
Страница 1022: ...CHAPTER 39 LLDP Commands 1022...
Страница 1064: ...CHAPTER 40 CFM Commands 1064...
Страница 1084: ...CHAPTER 42 Domain Name Service Commands 1084...
Страница 1090: ...CHAPTER 43 DHCP Commands DHCP Client 1090...
Страница 1122: ...CHAPTER 44 IP Interface Commands IPv6 Interface 1122...
Страница 1124: ...SECTION IV Appendices 1124...
Страница 1129: ...APPENDIX A Software Specifications Management Information Bases 1129 Trap RFC 1215 UDP MIB RFC 2013...
Страница 1130: ...APPENDIX A Software Specifications Management Information Bases 1130...
Страница 1152: ...COMMAND LIST 1152...
Страница 1161: ......
Страница 1162: ...DG FS4526E 042012 HW R01...