CCNA交换机基本配置.ppt

© 2002, Cisco Systems, Inc. All rights reserved.
© 2002, Cisco Systems, Inc. All rights reserved.
2
配置一台交换机
目标
当你完成本章,你将可以:
检测设备的默认配置,实现交换机的基本配置
配置交换机的管理地址和默认网关
根据不同的网络实现二层交换机的添加移动
IP address:
CDP: enabled
100baseT port: autonegotiate duplex mode
Spanning tree: enabled
Console password: none
2950系列交换机的默认配置
wg_sw_2950#show run
Building configuration...
Current configuration:
!
!
interface 0/1
!
interface 0/2
wg_sw_2950#show spantree
Interface Fa0/1 (port 7) in Spanning tree 1 is FORWARDING
Port path cost 19, Port priority 128
Designated root has priority 32768, address
Designated bridge has priority 32768, address
Designated port is 7, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 8316, received 4
wg_sw_2950#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4,
Fa0/5, Fa0/6, Fa0/7, Fa0/8,
Fa0/9, Fa0/10, Fa0/11, Fa0/12,
Fa0/13, Fa0/14, Fa0/15, Fa0/16,
Fa0/17, Fa0/18, Fa0/19, Fa0/20,
Fa0/21, Fa0/22, Fa0/23, Fa0/24
2950系列交换机的端口名称
配置交换机的管理地址
wg_sw_2950(config)#interface vlan 1
wg_sw_2950(config-if)#ip address
wg_sw_2950(config-if)#ip address {ip_address} {mask}
在交换机上配置VLAN1接口的IP地址和子网掩码
Catalyst 2950
wg_sw_a(config)# ip default-gateway {ip address}
配置交换机2950的默认网关
配置交换机的默认网关
wg_sw_a(config)#ip default-gateway
显示交换机的IP地址
Catalyst 2950
wg_sw_2950#show interface vlan 1
Vlan1 is up, line protocol is up
Hardware is Cat5k Virtual , address is (bia )
address is
Broadcast address is
. . .
wg_sw_2950#
双工介绍
半双工 Half Duplex (CSMA/CD)
单向数据流
高冲突发生率
用于连接集线器
全双工 Full Duplex
只支持点到点
要求双方都支持全双工
无冲突
设置全双工
Catalyst 2950
wg_sw_2950(config)#interface fe0/1
wg_sw_2950(config-if)#duplex {auto | full | half}