CCNA笔记

1.rip协议

no cdp run //禁用双工不匹配提示

no ip cef //禁用快速交换 基于目的负载均衡

no ip split-horizon //禁用水平分割 interface模式下 指定则不向接收路由方向传播接收到的路由，避免环路

router rip

net 1.0.0.0 //v1

passive-interface default //被动接口

neighbor 123.1.1.2 //单播邻居

default-information originate //指定当前为默认路由

浮动静态路由/备份双线：只声明快速网络，慢速网络添加静态路由，管理距离130 > 120(rip默认管理距离)，掉线自动切换网络

2.单臂路由配置实验

router-on-a-stick
1).create vlan
vlan database
vlan 1 name IT
2).add port to vlan
interface f0/0
switchport mode trunk
switchport trunk encapsulation dot1q
no shutdown
interface f0/1
switchport mode access
switchport access vlan 1
no shutdown
3).show vlan-switch brief
4).route interface ip
interface f0/0
ip address 192.168.1.1 255.255.255.0
no shutdown
interface f0/0.1
encapsulation dot1Q 1(vlan id)
ip address 192.168.2.1 255.255.255.0
no shutdown
5).pc gateway
no ip routing
ip default-gateway 192.168.2.1
interface f0/0
ip address 192.168.2.2 255.255.255.0
no shutdown