配置 Catalyst 交换机之间的 802.1Q 中继

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已更新: 2023 年 1 月 19 日

文档 ID:10599

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简介

本文档介绍运行Cisco IOS®软件的Cisco Catalyst交换机之间的IEEE 802.1Q(dot1q)中^继差异。

先决条件

要求

尝试进行此配置之前，请确保满足以下要求：

了解 IEEE 802.1Q 中继
了解使用命令行界面 (CLI) 对 Catalyst 3560 和 Catalyst 6500/6000 系列交换机进行的配置

使用的组件

本文档中的信息基于以下软件和硬件版本：

运行 Cisco IOS 软件版本 12.2(25)SEA 的 Catalyst 3560 交换机
运行 Cisco IOS 软件版本 12.1(26)E1 的 Catalyst 6509 交换机

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。

背景信息

本文档提供在运行 Cisco IOS® 软件的 Cisco Catalyst 3550/3560/3750 交换机与运行 Cisco IOS 软件的 Catalyst 6500/6000 系列交换机或 Catalyst 4500/4000 系列交换机之间配置 IEEE 802.1Q (dot1q) 中继的示例。中继是一种在两个设备之间点到点链路上传输来自若干 VLAN 的流量的方式。

您能实施以太网中继的二种方式是：

交换机间链路协议 (ISL) - Cisco 专有协议
802.1Q - IEEE标准

Catalyst组件

本文档中的 Catalyst 3560 配置也适用于运行 Cisco IOS 软件的 Catalyst 3550/3750 交换机。本文档中的 Catalyst 6500/6000 配置也适用于运行 Cisco IOS 软件的 Catalyst 4500/4000 系列交换机。

注意：请参阅以下文档以了解各种Catalyst交换机所支持的中继方法：

在Catalyst交换机上实施中继的系统要求

注意：本文档仅包含交换机的配置文件和相关示例命令的 show 输出。有关如何在Catalyst交换机之间配置802.1Q TRUNK的详细信息，请参阅以下文档：

配置 VLAN 的配置 VLAN 中继部分 - Catalyst 3560 系列交换机
配置第2层以太网接口 的“了解VLAN中继”部分 — 运行Cisco IOS软件的Catalyst 4500系列交换机

背景理论

IEEE 802.1Q 使用内部标记机制。中继设备先插入 4 字节标记来识别帧所属的 VLAN，再重新计算帧校验序列 (FCS)。有关详细信息，请参阅以下文档：

注意：下面是此配置需要记住的重要说明：

Catalyst 3550/3560/3750 系列交换机上的所有以太网接口均可支持 802.1Q 和 ISL 封装。默认情况下，Catalyst 3550 交换机上的以太网接口是第 2 层 (L2) 端口。
Catalyst 6500/6000 系列交换机上的所有以太网端口均可支持 802.1Q 和 ISL 封装。
默认情况下，运行 Cisco IOS 软件的 Catalyst 4500 系列交换机支持 ISL 和 802.1Q 中继模式。这在 WS-X4418-GB 和 WS-X4412-2GB-T 模块上阻塞千兆端口以外的所有接口上均受到支持。这些端口不支持 ISL 而只支持 802.1Q 中继。端口 3 至 18 是 WS-X4418-GB 模块上的阻塞千兆端口。端口 1 至 12 是 WS-X4412-2GB-T 模块上的阻塞千兆端口。

注：如果端口与背板的连接超订用，则该端口为阻塞端口。

Catalyst 6500/6000 与 Catalyst 4500 平台之间的主要区别在于默认接口配置。默认情况下，运行 Cisco IOS 软件的 Catalyst 6500/6000 交换机中处于关闭模式的接口为第 3 层 (L3) 路由端口。运行 Cisco IOS 软件的 Catalyst 4500/4000 交换机已启用所有接口。默认情况下，接口是 L2 交换机端口。
当802.1Q封装用于Catalyst 3750交换机上的中继接口时，输出上可以看到残帧，因为 show interface Catalyst 3750交换机将包含q标记的61-64字节的有效802.1Q封装数据包计为过小帧，即使这些数据包已正确转发。有关详细信息，请参阅思科漏洞ID CSCec14238 .

注意：只有思科注册用户才能访问思科内部工具和信息。

配置

本部分提供有关如何配置本文档所述功能的信息。

注意：使用命令查找工具可获取关于此部分中所用命令的更多信息。

注意：只有思科注册用户才能访问思科内部工具和信息。

网络图

本文档使用以下网络设置：

注意:Catalyst 3560上的千兆以太网接口是10/100/1000 Mbps协商以太网接口。因此，在此网络图中，Catalyst 3560 上的千兆端口连接到 Catalyst 6500 上的快速以太网 (100 Mbps) 端口。

Network Diagram 网络图

配置

本文档使用以下配置：

Catalyst 3560 交换机
!--- Notice: This example creates VLAN 1 and VLAN 2 !--- and sets the VLAN Trunk Protocol (VTP) mode to transparent. Use your !--- network as a basis and set the VTP mode accordingly. For more details, !--- refer to Configuring VLANs. version 12.2 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname 3560 ! !--- This is the privileged mode password for the example. enable password mysecret ! ip subnet-zero ! vtp mode transparent ! !--- VLAN 2 is created. This is visible only when you set VTP mode !--- to transparent. vlan 2 ! ! !--- The Gigabit Ethernet interface on the Catalyst 3560 is a 10/100/1000 Mbps !--- negotiated Ethernet interface. Therefore, the Gigabit port on the !--- Catalyst 3560 is connected to a Fast Ethernet port on the Catalyst 6500. !--- Configure the trunk on the Gigabit Ethernet 0/1 interface. interface GigabitEthernet0/1 !--- Configure trunk encapsulation as dot1q. !--- For details on trunking, refer to Configuring VLANs. switchport trunk encapsulation dot1q !--- Enable trunking on the interface. switchport mode trunk no ip address snmp trap link-status ! ! !--- Interfaces Gigabit Ethernet 0/2 through 0/5 are placed in VLAN 1. !--- In order to configure the interface as an L2 port, !--- refer to the Configuring Ethernet Interfaces section !--- of Configuring Interface Characteristics. All L2 ports are placed !--- in VLAN 1, by default. interface GigabitEthernet0/2 switchport mode access no ip address snmp trap link-status ! interface GigabitEthernet0/3 switchport mode access no ip address snmp trap link-status ! ! interface GigabitEthernet0/4 switchport mode access no ip address snmp trap link-status ! interface GigabitEthernet0/5 switchport mode access no ip address snmp trap link-status ! ! !--- Interfaces Gigabit Ethernet 0/6 through 0/12 are placed in VLAN 2. interface GigabitEthernet0/6 switchport access vlan 2 switchport mode access no ip address snmp trap link-status ! !--- Output suppressed. ! interface GigabitEthernet0/12 switchport access vlan 2 switchport mode access no ip address snmp trap link-status ! interface Vlan1 !--- This is the IP address for management. ip address 10.1.1.1 255.255.255.0 ! ip classless ip http server ! ! line con 0 transport input none line vty 0 4 !--- This is the privileged mode password for the example. password mysecret login line vty 5 15 login ! end

Catalyst 3560 交换机


!--- Notice: This example creates VLAN 1 and VLAN 2 
!--- and sets the VLAN Trunk Protocol (VTP) mode to transparent. Use your 
!--- network as a basis and set the VTP mode accordingly. For more details, 
!--- refer to Configuring VLANs.


 version 12.2 
 no service pad 
 service timestamps debug uptime 
 service timestamps log uptime 
 no service password-encryption 
 ! 
 hostname 3560 
 ! 

!--- This is the privileged mode password for the example.

 enable password mysecret
 ! 
 ip subnet-zero  
 ! 
 vtp mode transparent
 ! 

!--- VLAN 2 is created. This is visible only when you set VTP mode 
!--- to transparent. 

 vlan 2
 !

 ! 

!--- The Gigabit Ethernet interface on the Catalyst 3560 is a 10/100/1000 Mbps 
!--- negotiated Ethernet interface. Therefore, the Gigabit port on the 
!--- Catalyst 3560 is connected to a Fast Ethernet port on the Catalyst 6500. 
!--- Configure the trunk on the Gigabit Ethernet 0/1 interface.

 interface GigabitEthernet0/1 

!--- Configure trunk encapsulation as dot1q. 
!--- For details on trunking, refer to Configuring VLANs.

 switchport trunk encapsulation dot1q 

!--- Enable trunking on the interface.

 switchport mode trunk 
 no ip address 
 snmp trap link-status 
 !
 !

!--- Interfaces Gigabit Ethernet 0/2 through 0/5 are placed in VLAN 1. 
!--- In order to configure the interface as an L2 port, 
!--- refer to the Configuring Ethernet Interfaces section 
!--- of Configuring Interface Characteristics. All L2 ports are placed 
!--- in VLAN 1, by default.

 interface GigabitEthernet0/2 
 switchport mode access
 no ip address 
 snmp trap link-status 
 ! 
 interface GigabitEthernet0/3
 switchport mode access
 no ip address 
 snmp trap link-status 
 !
 !
 interface GigabitEthernet0/4 
 switchport mode access 
 no ip address 
 snmp trap link-status 
 ! 
 interface GigabitEthernet0/5 
 switchport mode access 
 no ip address 
 snmp trap link-status 
 ! 
 !

!--- Interfaces Gigabit Ethernet 0/6 through 0/12 are placed in VLAN 2.

 interface GigabitEthernet0/6 
 switchport access vlan 2 
 switchport mode access
 no ip address 
 snmp trap link-status 
 ! 
 
!--- Output suppressed.

 ! 
 interface GigabitEthernet0/12 
 switchport access vlan 2 
 switchport mode access 
 no ip address 
 snmp trap link-status 
 ! 
 interface Vlan1

!--- This is the IP address for management.

 ip address 10.1.1.1 255.255.255.0 
 ! 
 ip classless 
 ip http server 
 ! 
 ! 
 line con 0 
 transport input none 
 line vty 0 4 

!--- This is the privileged mode password for the example.

 password mysecret
 login 
 line vty 5 15 
 login 
 ! 
 end

Catalyst 6500 交换机
!--- Notice: This example creates VLAN 1 and VLAN 2 and sets !--- the VTP mode to transparent. Use your network as a basis and set the VTP !--- mode accordingly. For more details, refer to Configuring VLANs. Current configuration : 4812 bytes version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Cat6500 ! vtp mode transparent ip subnet-zero ! ! mls flow ip destination mls flow ipx destination ! !--- This is the privileged mode password for the example. enable password mysecret ! redundancy mode rpr-plus main-cpu auto-sync running-config auto-sync standard ! ! !--- This enables VLAN 2. vlan 2 ! ! interface GigabitEthernet1/1 no ip address shutdown ! interface GigabitEthernet1/2 no ip address shutdown ! !--- The Gigabit Ethernet interface on the Catalyst 3560 is a 10/100/1000 Mbps !--- negotiated Ethernet interface. Therefore, the Gigabit port on the Catalyst 3560 !--- is connected to a Fast Ethernet port on the Catalyst 6500. interface FastEthernet3/1 no ip address !--- You must issue the switchport command once, !--- without any keywords, in order to configure the interface as an L2 port for the !--- Catalyst 6500 series switch that runs Cisco IOS Software. !--- On a Catalyst 4500 series switch that runs Cisco IOS Software, all ports are L2 !--- ports by default. Therefore, if you do not change the default configuration, !--- you do not need to issue the switchport command. !--- For more details, refer to Configuring Layer 2 Ethernet Interfaces !--- for the Catalyst 4500 series switch that runs Cisco IOS Software. switchport !--- Configure trunk encapsulation as dot1q. !--- For more details on trunking, refer to !--- Configuring LAN Ports for Layer 2 Switching for the Catalyst 6500 series switch !--- that runs Cisco IOS Software, or Configuring Layer 2 Ethernet Interfaces !--- for the Catalyst 4500/4000 series switch that runs Cisco IOS Software. switchport trunk encapsulation dot1q !--- Enable trunking on the interface. switchport mode trunk ! !--- Configure interfaces Fast Ethernet 3/2 through 3/24 to be in access mode. !--- By default, all access ports are configured in VLAN 1. !--- For more details, refer to Configuring LAN Ports for Layer 2 Switching !--- for the Catalyst 6500 series switch that runs Cisco IOS Software, or !--- Configuring Layer 2 Ethernet Interfaces for the Catalyst 4500/4000 series !--- switch that runs Cisco IOS Software. interface FastEthernet3/2 no ip address switchport switchport mode access ! !--- Output suppressed. ! interface FastEthernet3/24 no ip address switchport switchport mode access ! !--- Fast Ethernet 3/25 through 3/48 are placed in VLAN 2. !--- For more details, refer to Configuring LAN Ports for Layer 2 Switching !--- for the Catalyst 6500 series switch that runs Cisco IOS Software, !--- or Configuring Layer 2 Ethernet Interfaces for the Catalyst 4500/4000 !--- series switch that runs Cisco IOS Software. interface FastEthernet3/25 no ip address switchport switchport access vlan 2 switchport mode access ! !--- Output suppressed. ! interface FastEthernet3/48 no ip address switchport switchport access vlan 2 switchport mode access ! ! interface Vlan1 !--- This is the IP address for management. ip address 10.1.1.2 255.255.255.0 ! ! ip classless no ip http server ! ! ip classless ip http server ! line con 0 exec-timeout 0 0 transport input none line vty 0 4 !--- This is the Telnet password for the example. password mysecret login ! end

Catalyst 6500 交换机


!--- Notice: This example creates VLAN 1 and VLAN 2 and sets 
!--- the VTP mode to transparent. Use your network as a basis and set the VTP 
!--- mode accordingly. For more details, refer to Configuring VLANs.


 Current configuration : 4812 bytes
 version 12.1 
 service timestamps debug uptime 
 service timestamps log uptime 
 no service password-encryption 
 ! 
 hostname Cat6500 
 ! 
 vtp mode transparent
 ip subnet-zero
 !
 !
 mls flow ip destination 
 mls flow ipx destination 
 !

!--- This is the privileged mode password for the example.

 enable password mysecret
 ! 
 redundancy 
 mode rpr-plus
 main-cpu 
 auto-sync running-config
 auto-sync standard 
  
 ! 
 ! 

!--- This enables VLAN 2.

 vlan 2
 !
 !

 
 interface GigabitEthernet1/1 
 no ip address 
 shutdown 
 ! 
 interface GigabitEthernet1/2 
 no ip address 
 shutdown 
 ! 

!--- The Gigabit Ethernet interface on the Catalyst 3560 is a 10/100/1000 Mbps 
!--- negotiated Ethernet interface. Therefore, the Gigabit port on the Catalyst 3560 
!--- is connected to a Fast Ethernet port on the Catalyst 6500.

 interface FastEthernet3/1 
 no ip address 

!--- You must issue the switchport command once, 
!--- without any keywords, in order to configure the interface as an L2 port for the 
!--- Catalyst 6500 series switch that runs Cisco IOS Software. 
!--- On a Catalyst 4500 series switch that runs Cisco IOS Software, all ports are L2 
!--- ports by default. Therefore, if you do not change the default configuration, 
!--- you do not need to issue the switchport command. 
!--- For more details, refer to  Configuring Layer 2 Ethernet Interfaces 
!--- for the Catalyst 4500 series switch that runs Cisco IOS Software.


 switchport 

!--- Configure trunk encapsulation as dot1q. 
!--- For more details on trunking, refer to 
!--- Configuring LAN Ports for Layer 2 Switching for the Catalyst 6500 series switch 
!--- that runs Cisco IOS Software, or  Configuring Layer 2 Ethernet Interfaces 
!--- for the Catalyst 4500/4000 series switch that runs Cisco IOS Software.

 switchport trunk encapsulation dot1q 


!--- Enable trunking on the interface.


 switchport mode trunk 
 ! 

!--- Configure interfaces Fast Ethernet 3/2 through 3/24 to be in access mode. 
!--- By default, all access ports are configured in VLAN 1. 
!--- For more details, refer to Configuring LAN Ports for Layer 2 Switching
!--- for the Catalyst 6500 series switch that runs Cisco IOS Software, or 
!--- Configuring Layer 2 Ethernet Interfaces for the Catalyst 4500/4000 series 
!--- switch that runs Cisco IOS Software.

 interface FastEthernet3/2
 no ip address
 switchport
 switchport mode access
 ! 
 

!--- Output suppressed.

 !
 interface FastEthernet3/24
 no ip address 
 switchport 
 switchport mode access
 !

!--- Fast Ethernet 3/25 through 3/48 are placed in VLAN 2. 
!--- For more details, refer to Configuring LAN Ports for Layer 2 Switching 
!--- for the Catalyst 6500 series switch that runs Cisco IOS Software, 
!--- or Configuring Layer 2 Ethernet Interfaces for the Catalyst 4500/4000 
!--- series switch that runs Cisco IOS Software.

 interface FastEthernet3/25
 no ip address 
 switchport 
 switchport access vlan 2 
 switchport mode access 
 ! 
  

!--- Output suppressed.

 ! 
 interface FastEthernet3/48
 no ip address 
 switchport 
 switchport access vlan 2 
 switchport mode access 
 ! 
 ! 
 interface Vlan1 

!--- This is the IP address for management.

 ip address 10.1.1.2 255.255.255.0 
 ! 
 !
 ip classless 
 no ip http server 
 ! 
 ! 
 ip classless
 ip http server
 ! 
 line con 0 
 exec-timeout 0 0 
 transport input none 
 line vty 0 4 

!--- This is the Telnet password for the example.

 password mysecret
 login 
 
 ! 
 end

注：如果将接口分配给不存在的VLAN，该接口将关闭，直到您在VLAN数据库中创建VLAN。有关详细信息，请参阅配置 VLAN 的创建或修改以太网 VLAN 部分。

验证

使用本部分可确认配置能否正常运行。

输出解释程序工具(OIT)支持某些命 show 令。使用OIT查看命令输出的 show 分析。

注意：只有思科注册用户才能访问思科内部工具和信息。

在 Catalyst 3550/3560/3750/6500/4500 交换机上，请使用以下命令：

show interface interface_typemodule/porttrunk
show interfacesinterface_typemodule/portswitchport
show vlan
show vtp status

命令 `show` 输出示例

Catalyst 3560 交换机

show interfaces interface_type module/por trunk — 此命令显示接口的TRUNK配置以及流量能够通过TRUNK传输的VLAN编号。

3560# show interface gigabitethernet 0/1 trunk
 
Port      Mode         Encapsulation  Status        Native vlan
Gi0/1     on           802.1q         trunking      1
 
Port      Vlans allowed on trunk
Gi0/1     1 4094
 
Port      Vlans allowed and active in management domain
Gi0/1     1-2
 
Port      Vlans in spanning tree forwarding state and not pruned
Gi0/1     1-2

show interfaces interface_type module/port switchport - 此命令显示接口的交换机端口配置。

在显示器中，选中 Operational Mode 和 Operational Trunking Encapsulation 字段。

3560# show interface gigabitethernet 0/1 switchport
Name: Gi0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL  
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust : none

show vlan - 此命令提供有关 VLAN 及属于特定 VLAN 的端口的信息。

3560# show vlan
 
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/2, Gi0/3, Gi0/4, Gi0/5
2    VLAN0002                         active    Gi0/6, Gi0/7, Gi0/8, Gi0/9
                                                            Gi0/10, Gi0/11, Gi0/12

1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

!--- Output suppressed.

注：输出中显示的端口仅为接入端口。但是，配置为中继以及处于“未连接”状态的端口也显示在 show vlan 输出中。

show vtp status - 此命令显示有关 VTP 管理域、状态和计数器的一般信息。

3560# show vtp status
VTP Version : 2 
Configuration Revision : 0 
Maximum VLANs supported locally : 1005 
Number of existing VLANs : 6 
VTP Operating Mode : Transparent      
VTP Domain Name : 
VTP Pruning Mode : Disabled 
VTP V2 Mode : Disabled 
VTP Traps Generation : Disabled 
MD5 digest : 0x4A 0x55 0x17 0x84 0xDB 0x99 0x3F 0xD1 
Configuration last modified by 10.1.1.1 at 0-0-00 00:00:00

3560# ping 10.1.1.2 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms 
3560#

Catalyst 6500 交换机

show interfacesinterface_type module/porttrunk — 此命令显示接口的TRUNK配置以及流量能够通过TRUNK传输的VLAN编号。

Cat6500# show interfaces fastethernet 3/1 trunk
 
Port      Mode         Encapsulation  Status        Native vlan
Fa3/1     on           802.1q         trunking      1
 
Port      Vlans allowed on trunk
Fa3/1     1 4094
 
Port      Vlans allowed and active in management domain
Fa3/1     1-2
 
Port      Vlans in spanning tree forwarding state and not pruned
Fa3/1     1-2

show interfacesinterface_typemodule/portswitchport — 此命令显示接口的交换机端口配置。在显示器中，选中 Operational Mode 和 Operational Trunking Encapsulation 字段。

cat6500# show interface fastethernet 3/1 switchport 
Name: Fa3/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL

show vlan - 此命令提供有关 VLAN 及属于特定 VLAN 的端口的信息。

Cat6500# show vlan
 
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa3/2, Fa3/3, Fa3/4, Fa3/5
                                                Fa3/6, Fa3/7, Fa3/8, Fa3/9
                                                Fa3/10, Fa3/11, Fa3/12, Fa3/13
                                                Fa3/14, Fa3/15, Fa3/16, Fa3/17
                                                Fa3/18, Fa3/19, Fa3/20, Fa3/21
                                                Fa3/22, Fa3/23, Fa3/24
2    VLAN0002                         active    Fa3/25, Fa3/26, Fa3/27, Fa3/28
                                                Fa3/29, Fa3/30, Fa3/31, Fa3/32
                                                Fa3/33, Fa3/34, Fa3/35, Fa3/36
                                                Fa3/37, Fa3/38, Fa3/39, Fa3/40
                                                Fa3/41, Fa3/42, Fa3/43, Fa3/44
                                                Fa3/45, Fa3/46, Fa3/47, Fa3/48
1002 fddi-default                      act/unsup
1003 token-ring-default                act/unsup
1004 fddinet-default                   act/unsup
1005 trnet-default                     act/unsup


!--- Output suppressed.

注：显示的端口只是那些已配置为第2层非中继（接入）端口的端口。配置为中继以及处于“未连接”状态的端口也显示在 show vlan 输出中。有关详细信息，请参阅为第2层交换配置LAN端口的为第2层交换配置LAN接口部分。

show vtp status - 此命令显示有关 VTP 管理域、状态和计数器的一般信息。

Cat6500# show vtp status
VTP Version                     : 2
Configuration Revision          : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 6
VTP Operating Mode              : Transparent
VTP Domain Name                 :
VTP Pruning Mode                : Disabled
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Disabled
MD5 digest                      : 0xBF 0x86 0x94 0x45 0xFC 0xDF 0xB5 0x70
Configuration last modified by 10.1.1.2 at 0-0-00 00:00:00

ping

Cat6500# ping 10.1.1.1
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

故障排除

当前没有可用于此配置的特定故障排除信息。有关中继和802.1Q配置的常见问题，请参阅文档使用802.1Q封装和Cisco CatOS系统软件在Catalyst 4500/4000、5500/5000和6500/6000系列交换机之间进行中继的常见错误部分。

版本	发布日期	备注
2.0	19-Jan-2023	更新格式。修复CCW警报。重新认证。
1.0	29-Nov-2001	初始版本

配置 Catalyst 交换机之间的 802.1Q 中继

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简介

先决条件

要求

使用的组件

背景信息

Catalyst组件

背景理论

配置

网络图

配置

验证

命令 `show` 输出示例

Catalyst 3560 交换机

Catalyst 6500 交换机

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配置 Catalyst 交换机之间的 802.1Q 中继

下载选项

非歧视性语言

关于此翻译

目录

简介

先决条件

要求

使用的组件

背景信息

Catalyst组件

背景理论

配置

网络图

配置

验证

命令 show 输出示例

Catalyst 3560 交换机

Catalyst 6500 交换机

故障排除

相关信息

修订历史记录

由思科工程师提供

此文档是否有帮助?

联系我们

本文档适用于以下产品

命令 `show` 输出示例