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首页Catalyst 3750交换机配置指南:Cisco IOS 12.2(52)SE
Catalyst 3750交换机配置指南:Cisco IOS 12.2(52)SE
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更新于2024-07-28
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《思考 3750手册》是一份全面详尽的文档,针对Cisco Systems, Inc. 的Catalyst 3750交换机提供了深入的配置指导和实例。该手册专为Cisco IOS Release 12.2(52) SE版本编写,发布日期为2009年9月,适用于美洲总部。用户可以通过访问http://www.cisco.com获取更多信息或联系技术支持。 这份手册的核心内容涵盖了Catalyst 3750交换机的所有配置命令及其用法,对于网络管理员和工程师来说,是进行设备配置、管理和维护的重要参考资料。手册强调了配置过程中可能遇到的关键参数和步骤,旨在确保用户能够高效、安全地操作交换机,提升网络性能。 特别值得注意的是,书中提及的TCP头压缩技术。Cisco采用了加州大学伯克利分校(UC Berkeley)开发的一种公共领域UNIX操作系统的一部分,对TCP头部进行压缩,以减少网络传输中的开销。这一功能有助于提高数据传输效率,尤其是在处理大量数据流量的场景中,可以显著节省带宽资源。 此外,手册中还包含了关于产品规格和信息的更新说明,提醒读者注意可能存在的变动,并明确表示所有内容、陈述和建议虽然经过核实但不提供任何形式的担保,用户应自行承担应用产品的全部责任。软件许可和有限保修的具体条款可在产品附带的信息包中找到,如无法找到,用户应联系Cisco代表索取。 《思考 3750手册》不仅提供了技术细节,还强调了最佳实践和潜在风险,是Catalyst 3750交换机用户必备的参考工具,帮助他们充分利用设备功能,优化网络架构,应对不断变化的IT环境。
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Contents
xvi
Catalyst 3750 Switch Software Configuration Guide
OL-8550-08
CHAPTER
14 Configuring VLANs 14-1
Understanding VLANs 14-1
Supported VLANs 14-2
VLAN Port Membership Modes 14-3
Configuring Normal-Range VLANs 14-4
Token Ring VLANs 14-6
Normal-Range VLAN Configuration Guidelines 14-6
Configuring Normal-Range VLANs 14-7
Default Ethernet VLAN Configuration 14-7
Creating or Modifying an Ethernet VLAN 14-8
Deleting a VLAN 14-9
Assigning Static-Access Ports to a VLAN 14-10
Configuring Extended-Range VLANs 14-11
Default VLAN Configuration 14-11
Extended-Range VLAN Configuration Guidelines 14-11
Creating an Extended-Range VLAN 14-12
Creating an Extended-Range VLAN with an Internal VLAN ID 14-13
Displaying VLANs 14-14
Configuring VLAN Trunks 14-15
Trunking Overview 14-15
Encapsulation Types 14-17
IEEE 802.1Q Configuration Considerations 14-17
Default Layer 2 Ethernet Interface VLAN Configuration 14-18
Configuring an Ethernet Interface as a Trunk Port 14-18
Interaction with Other Features 14-18
Configuring a Trunk Port 14-19
Defining the Allowed VLANs on a Trunk 14-20
Changing the Pruning-Eligible List 14-21
Configuring the Native VLAN for Untagged Traffic 14-22
Configuring Trunk Ports for Load Sharing 14-22
Load Sharing Using STP Port Priorities 14-23
Load Sharing Using STP Path Cost 14-25
Configuring VMPS 14-26
Understanding VMPS 14-26
Dynamic-Access Port VLAN Membership 14-27
Default VMPS Client Configuration 14-27
VMPS Configuration Guidelines 14-28
Configuring the VMPS Client 14-28
Entering the IP Address of the VMPS 14-28
Contents
xvii
Catalyst 3750 Switch Software Configuration Guide
OL-8550-08
Configuring Dynamic-Access Ports on VMPS Clients 14-29
Reconfirming VLAN Memberships 14-30
Changing the Reconfirmation Interval 14-30
Changing the Retry Count 14-30
Monitoring the VMPS 14-31
Troubleshooting Dynamic-Access Port VLAN Membership 14-31
VMPS Configuration Example 14-31
CHAPTER
15 Configuring VTP 15-1
Understanding VTP 15-1
The VTP Domain 15-2
VTP Modes 15-3
VTP Advertisements 15-4
VTP Version 2 15-4
VTP Version 3 15-5
VTP Pruning 15-6
VTP and Switch Stacks 15-7
Configuring VTP 15-8
Default VTP Configuration 15-8
VTP Configuration Guidelines 15-8
Domain Names 15-9
Passwords 15-9
VTP Version 15-10
Configuration Requirements 15-10
Configuring VTP Mode 15-11
Configuring a VTP Version 3 Password 15-13
Configuring a VTP Version 3 Primary Server 15-13
Enabling the VTP Version 15-14
Enabling VTP Pruning 15-15
Configuring VTP on a Per-Port Basis 15-15
Adding a VTP Client Switch to a VTP Domain 15-16
Monitoring VTP 15-17
CHAPTER
16 Configuring Voice VLAN 16-1
Understanding Voice VLAN 16-1
Cisco IP Phone Voice Traffic 16-2
Cisco IP Phone Data Traffic 16-2
Configuring Voice VLAN 16-3
Default Voice VLAN Configuration 16-3
Contents
xviii
Catalyst 3750 Switch Software Configuration Guide
OL-8550-08
Voice VLAN Configuration Guidelines 16-3
Configuring a Port Connected to a Cisco 7960 IP Phone 16-4
Configuring Cisco IP Phone Voice Traffic 16-5
Configuring the Priority of Incoming Data Frames 16-6
Displaying Voice VLAN 16-7
CHAPTER
17 Configuring Private VLANs 17-1
Understanding Private VLANs 17-1
IP Addressing Scheme with Private VLANs 17-3
Private VLANs across Multiple Switches 17-4
Private-VLAN Interaction with Other Features 17-4
Private VLANs and Unicast, Broadcast, and Multicast Traffic 17-5
Private VLANs and SVIs 17-5
Private VLANs and Switch Stacks 17-5
Configuring Private VLANs 17-6
Tasks for Configuring Private VLANs 17-6
Default Private-VLAN Configuration 17-6
Private-VLAN Configuration Guidelines 17-7
Secondary and Primary VLAN Configuration 17-7
Private-VLAN Port Configuration 17-8
Limitations with Other Features 17-9
Configuring and Associating VLANs in a Private VLAN 17-10
Configuring a Layer 2 Interface as a Private-VLAN Host Port 17-11
Configuring a Layer 2 Interface as a Private-VLAN Promiscuous Port 17-12
Mapping Secondary VLANs to a Primary VLAN Layer 3 VLAN Interface 17-13
Monitoring Private VLANs 17-14
CHAPTER
18 Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling 18-1
Understanding IEEE 802.1Q Tunneling 18-1
Configuring IEEE 802.1Q Tunneling 18-4
Default IEEE 802.1Q Tunneling Configuration 18-4
IEEE 802.1Q Tunneling Configuration Guidelines 18-4
Native VLANs 18-4
System MTU 18-5
IEEE 802.1Q Tunneling and Other Features 18-6
Configuring an IEEE 802.1Q Tunneling Port 18-6
Understanding Layer 2 Protocol Tunneling 18-7
Configuring Layer 2 Protocol Tunneling 18-10
Default Layer 2 Protocol Tunneling Configuration 18-11
Contents
xix
Catalyst 3750 Switch Software Configuration Guide
OL-8550-08
Layer 2 Protocol Tunneling Configuration Guidelines 18-12
Configuring Layer 2 Protocol Tunneling 18-13
Configuring Layer 2 Tunneling for EtherChannels 18-14
Configuring the SP Edge Switch 18-14
Configuring the Customer Switch 18-16
Monitoring and Maintaining Tunneling Status 18-18
CHAPTER
19 Configuring STP 19-1
Understanding Spanning-Tree Features 19-1
STP Overview 19-2
Spanning-Tree Topology and BPDUs 19-3
Bridge ID, Switch Priority, and Extended System ID 19-4
Spanning-Tree Interface States 19-5
Blocking State 19-6
Listening State 19-7
Learning State 19-7
Forwarding State 19-7
Disabled State 19-7
How a Switch or Port Becomes the Root Switch or Root Port 19-8
Spanning Tree and Redundant Connectivity 19-8
Spanning-Tree Address Management 19-9
Accelerated Aging to Retain Connectivity 19-9
Spanning-Tree Modes and Protocols 19-10
Supported Spanning-Tree Instances 19-10
Spanning-Tree Interoperability and Backward Compatibility 19-11
STP and IEEE 802.1Q Trunks 19-11
VLAN-Bridge Spanning Tree 19-11
Spanning Tree and Switch Stacks 19-12
Configuring Spanning-Tree Features 19-12
Default Spanning-Tree Configuration 19-13
Spanning-Tree Configuration Guidelines 19-13
Changing the Spanning-Tree Mode. 19-15
Disabling Spanning Tree 19-16
Configuring the Root Switch 19-16
Configuring a Secondary Root Switch 19-18
Configuring Port Priority 19-18
Configuring Path Cost 19-20
Configuring the Switch Priority of a VLAN 19-21
Configuring Spanning-Tree Timers 19-22
Contents
xx
Catalyst 3750 Switch Software Configuration Guide
OL-8550-08
Configuring the Hello Time 19-22
Configuring the Forwarding-Delay Time for a VLAN 19-23
Configuring the Maximum-Aging Time for a VLAN 19-23
Configuring the Transmit Hold-Count 19-24
Displaying the Spanning-Tree Status 19-24
CHAPTER
20 Configuring MSTP 20-1
Understanding MSTP 20-2
Multiple Spanning-Tree Regions 20-2
IST, CIST, and CST 20-3
Operations Within an MST Region 20-3
Operations Between MST Regions 20-4
IEEE 802.1s Terminology 20-5
Hop Count 20-5
Boundary Ports 20-6
IEEE 802.1s Implementation 20-6
Port Role Naming Change 20-7
Interoperation Between Legacy and Standard Switches 20-7
Detecting Unidirectional Link Failure 20-8
MSTP and Switch Stacks 20-8
Interoperability with IEEE 802.1D STP 20-9
Understanding RSTP 20-9
Port Roles and the Active Topology 20-9
Rapid Convergence 20-10
Synchronization of Port Roles 20-11
Bridge Protocol Data Unit Format and Processing 20-12
Processing Superior BPDU Information 20-13
Processing Inferior BPDU Information 20-13
Topology Changes 20-13
Configuring MSTP Features 20-14
Default MSTP Configuration 20-15
MSTP Configuration Guidelines 20-15
Specifying the MST Region Configuration and Enabling MSTP 20-16
Configuring the Root Switch 20-17
Configuring a Secondary Root Switch 20-19
Configuring Port Priority 20-19
Configuring Path Cost 20-21
Configuring the Switch Priority 20-22
Configuring the Hello Time 20-22
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