核心交换机这个词对于我们来说太过于陌生了，但是它在我们的网络生活中起到了非常必要的作用。小兔来简单的做个比喻，我们可以将核心交换机比喻为一个大型的路由器，它可以将网络覆盖到各个电脑，不过它的覆盖范围则是路由器的几百倍甚至几千倍。可以说没有它的存在就没有网络的传播，我们便没有网络的使用，这么神奇的机器就由小兔来讲解它的配置。
System-view一、激活combo端口，启用DHCPinterfaceGigabitEthernet0/0/5undoshutdowninterfaceGigabitEthernet0/0/6undoshutdowninterfaceGigabitEthernet0/0/7undoshutdowninterfaceGigabitEthernet0/0/8undoshutdowndhcpenable
二、建立vlanVlan1防火墙用(端口27-28)Vlan20服务器用(端口15-26)Vlan2-9保持不变(端口5-12)Vlan10-11原Vlan1计算机使用(端口13-14)
Vlan1interfaceVlan-interface1ipaddress10.0.1.1255.255.255.0dhcpselectserverglobal-pool
Vlan2interfaceVlan-interface2ipaddress10.0.2.1255.255.255.0dhcpselectserverglobal-pool
Vlan3interfaceVlan-interface3ipaddress10.0.3.1255.255.255.0dhcpselectserverglobal-pool
Vlan4interfaceVlan-interface4ipaddress10.0.4.1255.255.255.0dhcpselectserverglobal-pool
Vlan5interfaceVlan-interface5ipaddress10.0.5.1255.255.255.0dhcpselectserverglobal-pool
Vlan6interfaceVlan-interface6ipaddress10.0.6.1255.255.255.0dhcpselectserverglobal-pool
Vlan7interfaceVlan-interface7ipaddress10.0.7.1255.255.255.0dhcpselectserverglobal-pool
Vlan8interfaceVlan-interface8ipaddress10.0.8.1255.255.255.0dhcpselectserverglobal-pool
Vlan9interfaceVlan-interface9ipaddress10.0.9.1255.255.255.0dhcpselectserverglobal-pool
Vlan10interfaceVlan-interface10ipaddress10.0.10.1255.255.255.0dhcpselectserverglobal-pool
Vlan11interfaceVlan-interface11ipaddress10.0.11.1255.255.255.0dhcpselectserverglobal-pool
Vlan20interfaceVlan-interface20ipaddress10.0.0.1255.255.255.0dhcpselectserverglobal-pool
三、设定端口所在
vlaninterfaceGigabitEthernet0/0/5portaccessvlan2interfaceGigabitEthernet0/0/6portaccess
vlan3interfaceGigabitEthernet0/0/7portaccess
vlan4interfaceGigabitEthernet0/0/8portaccess
vlan5interfaceGigabitEthernet0/0/9portaccess
vlan6interfaceGigabitEthernet0/0/10portaccess
vlan7interfaceGigabitEthernet0/0/11portaccess
vlan8interfaceGigabitEthernet0/0/12portaccess
vlan9interfaceGigabitEthernet0/0/13portaccess
vlan10interfaceGigabitEthernet0/0/14portaccess
vlan11interfaceGigabitEthernet0/0/15portaccess
vlan20interfaceGigabitEthernet0/0/16portaccess
vlan20interfaceGigabitEthernet0/0/17portaccess
vlan20interfaceGigabitEthernet0/0/18portaccess
vlan20interfaceGigabitEthernet0/0/19portaccess
vlan20interfaceGigabitEthernet0/0/20portaccess
vlan20interfaceGigabitEthernet0/0/21portaccess
vlan20interfaceGigabitEthernet0/0/22portaccess
vlan20interfaceGigabitEthernet0/0/23portaccess
vlan20interfaceGigabitEthernet0/0/24portaccess
vlan20interfaceGigabitEthernet0/0/25portaccess
vlan20interfaceGigabitEthernet0/0/26portaccess
vlan20interfaceGigabitEthernet0/0/27portaccess
vlan1interfaceGigabitEthernet0/0/28portaccess
四、定义地址池
dhcpserverip-poolvlan1network10.0.1.0mask255.255.255.0
gateway-list10.0.1.1
dns-list10.0.0.16domain-name
dfic.netdhcpserverip-pool
vlan2network10.0.2.0
mask255.255.255.0
gateway-list10.0.2.1
dns-list10.0.0.16
domain-namedfic.net
dhcpserverip-pool
vlan3network10.0.3.0
gateway-list10.0.3.1
五、设置路由
Undoiproute-static0.0.0.00.0.0.010.0.1.1
preference60dhcpserverforbidden-ip10.0.0.1
dhcpserverforbidden-ip10.0.1.1
dhcpserverforbidden-ip10.0.1.25010.0.1.254
dhcpserverforbidden-ip10.0.2.1
dhcpserverforbidden-ip10.0.3.1
dhcpserverforbidden-ip10.0.4.1
dhcpserverforbidden-ip10.0.5.1
dhcpserverforbidden-ip10.0.7.1
dhcpserverforbidden-ip10.0.8.1
dhcpserverforbidden-ip10.0.9.1
dhcpserverforbidden-ip10.0.10.1
dhcpserverforbidden-ip10.0.11.1
听完的介绍之后不知道大家明白没有，核心交换机的配置固然是繁琐的，但是它担任的职责是非常重要的，它负责覆盖一个乡镇甚至一个县城的网络，如果核心交换机出现了故障那我们将无法正常上网，虽然我们大部分人是接触不到核心交换机的，但是了解一下它的配置对于我们自身来说也是在增长知识。