C
HAPTER
33
| Spanning Tree Commands
– 1093 –
C
OMMAND
U
SAGE
◆
This command defines the priority for the use of a port in the Spanning
Tree Algorithm. If the path cost for all ports on a switch are the same,
the port with the highest priority (that is, lowest value) will be
configured as an active link in the spanning tree.
◆
Where more than one port is assigned the highest priority, the port with
lowest numeric identifier will be enabled.
E
XAMPLE
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree port-priority 0
R
ELATED
C
OMMANDS
spanning-tree cost (1085)
spanning-tree
root-guard
This command prevents a designated port
25
from taking superior BPDUs
into account and allowing a new STP root port to be elected. Use the
no
form to disable this feature.
S
YNTAX
[
no
]
spanning-tree
root-guard
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (Ethernet, Port Channel)
C
OMMAND
U
SAGE
◆
A bridge with a lower bridge identifier (or same identifier and lower
MAC address) can take over as the root bridge at any time.
◆
When Root Guard is enabled, and the switch receives a superior BPDU
on this port, it is set to the Discarding state until it stops receiving
superior BPDUs for a fixed recovery period. While in the discarding
state, no traffic is forwarded across the port.
◆
Root Guard can be used to ensure that the root bridge is not formed at
a suboptimal location. Root Guard should be enabled on any designated
port connected to low-speed bridges which could potentially overload a
slower link by taking over as the root port and forming a new spanning
tree topology. It could also be used to form a border around part of the
network where the root bridge is allowed.
◆
When spanning tree is initialized globally on the switch or on an
interface, the switch will wait for 20 seconds to ensure that the
spanning tree has converged before enabling Root Guard.
25. See Port Role under
"Displaying Interface Settings for STA" on page 254
.
Содержание ECS3510-10PD
Страница 1: ...Management Guide www edge core com 10 Port Layer 2 Fast Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 48: ...CONTENTS 48...
Страница 68: ...SECTION I Getting Started 68...
Страница 78: ...CHAPTER 1 Introduction System Defaults 78...
Страница 96: ...CHAPTER 2 Initial Switch Configuration Managing System Files 96...
Страница 98: ...SECTION II Web Configuration 98...
Страница 118: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 118...
Страница 150: ...CHAPTER 4 Basic Management Tasks Resetting the System 150...
Страница 196: ...CHAPTER 5 Interface Configuration VLAN Trunking 196 Figure 66 Configuring VLAN Trunking...
Страница 238: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 238...
Страница 264: ...CHAPTER 8 Spanning Tree Algorithm Configuring Interface Settings for MSTP 264...
Страница 274: ...CHAPTER 9 Congestion Control Automatic Traffic Control 274...
Страница 288: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 288...
Страница 304: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 304...
Страница 423: ...CHAPTER 13 Security Measures DHCP Snooping 423 Figure 229 Displaying the Binding Table for DHCP Snooping...
Страница 424: ...CHAPTER 13 Security Measures DHCP Snooping 424...
Страница 568: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 568...
Страница 596: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 596...
Страница 614: ...CHAPTER 1 IP Services Configuring the PPPoE Intermediate Agent 614...
Страница 784: ...CHAPTER 20 System Management Commands Powered Device 784...
Страница 814: ...CHAPTER 22 Remote Monitoring Commands 814...
Страница 1008: ...CHAPTER 26 Interface Commands Power Savings 1008...
Страница 1022: ...CHAPTER 27 Link Aggregation Commands Trunk Status Display Commands 1022...
Страница 1052: ...CHAPTER 29 Congestion Control Commands Automatic Traffic Control Commands 1052...
Страница 1064: ...CHAPTER 31 UniDirectional Link Detection Commands 1064...
Страница 1070: ...CHAPTER 32 Address Table Commands 1070...
Страница 1130: ...CHAPTER 34 ERPS Commands 1130...
Страница 1172: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 1172...
Страница 1186: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 1186...
Страница 1302: ...CHAPTER 38 Multicast Filtering Commands MVR for IPv6 1302...
Страница 1368: ...CHAPTER 40 CFM Commands Delay Measure Operations 1368...
Страница 1390: ...CHAPTER 42 Domain Name Service Commands 1390...
Страница 1448: ...CHAPTER 44 IP Interface Commands ND Snooping 1448...
Страница 1450: ...SECTION IV Appendices 1450...
Страница 1455: ...APPENDIX A Software Specifications Management Information Bases 1455 UDP MIB RFC 2013...
Страница 1456: ...APPENDIX A Software Specifications Management Information Bases 1456...
Страница 1464: ...APPENDIX D Compliances and Safety Statements CE Mark Declaration of Conformance for EMI and Safety EEC 1464...
Страница 1482: ...COMMAND LIST 1482...
Страница 1493: ......
Страница 1494: ...ECS3510 10PD E032014 ST R03 149100000179A...