思科交换机跨VLAN中继链路配置教程

为了实现不同VLAN间的主机通信，需要配置跨交换机的VLAN中继链路。本教程将以两个思科交换机为例，详细介绍配置过程。

网络拓扑:

交换机1 (VTP Server): 192.168.209.4 * VLAN 2: 主机1 (192.168.209.13, F0/21-24 连接到交换机端口 F0/22) * VLAN 3: * 主机2 (192.168.209.14, F0/1-15 连接到交换机端口 F0/7) * 主机3 (192.168.209.15, F0/16-20 连接到交换机端口 F0/17)* 交换机2 (VTP Client): 192.168.209.5 * VLAN 2: 主机4 (192.168.209.17, F0/15-22 连接到交换机端口 F0/16) * VLAN 3: * 主机5 (192.168.209.18, F0/1-6 连接到交换机端口 F0/5) * 主机6 (192.168.209.16, F0/8-14 连接到交换机端口 F0/9)

配置步骤:

1. 配置 VTP

在 VTP Server (交换机1) 上启用 VTP 并设置域名：

enableconfigure terminalvtp domain <域名>vtp mode server

在 VTP Client (交换机2) 上启用 VTP 并加入相同的域名：

enableconfigure terminalvtp domain <域名>vtp mode client

2. 创建 VLAN

在 VTP Server (交换机1) 上创建 VLAN 2 和 VLAN 3：

vlan 2name VLAN2exit

vlan 3name VLAN3exit

3. 配置交换机端口

在交换机1上配置接口 VLAN：

interface FastEthernet0/21switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/22switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/23switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/24switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/1switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/2switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/3switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/4switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/5switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/6switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/7switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/15switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/16switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/17switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/18switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/19switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/20switchport mode accessswitchport access vlan 3exit

在交换机2上配置接口 VLAN:

interface FastEthernet0/1switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/2switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/3switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/4switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/5switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/6switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/7switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/8switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/9switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/10switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/11switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/12switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/13switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/14switchport mode accessswitchport access vlan 3exit

interface FastEthernet0/15switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/16switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/17switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/18switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/19switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/20switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/21switchport mode accessswitchport access vlan 2exit

interface FastEthernet0/22switchport mode accessswitchport access vlan 2exit

4. 配置中继链路

选择连接两台交换机的端口 (例如, 交换机1 的 GigabitEthernet0/1 和交换机2 的 GigabitEthernet0/1), 并将这些端口配置为中继模式:

interface GigabitEthernet0/1switchport mode trunkexit

5. 验证配置

在每个 VLAN 的主机上执行 ping 命令，测试主机之间的连通性。例如：
- 从主机1 (VLAN 2) ping 主机4 (VLAN 2) * 从主机2 (VLAN 3) ping 主机5 (VLAN 3)

如果 ping 操作成功，则说明跨交换机的 VLAN 中继链路配置正确。

注意：

以上命令仅供参考，实际配置可能会因交换机型号和 IOS 版本而异。* 请根据您的网络环境和需求修改 VLAN ID、IP 地址等参数。* 建议您查阅相关设备文档以获取更详细的信息