5、配置交换机的路由功能
说明：只有在三层交换机上才有路由功能，其他的二层接入交换机要想在不同的vlan之间传送数据需要通过trunk口到核心交换机上进行完路由交换后才可以。
TEST(config)#ip routing # 使能三层交换机的路由功能，默认是关闭的
TEST(config)#ip route 0.0.0.0 0.0.0.0 172.16.0.1
# 配置交换机的默认路由，也就是总的出口路由。
TEST(config)#end # 退出验证一下刚才的配置
TEST#sh ip rouet
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is 172.16.0.1 to network 0.0.0.0 C 192.168.106.0/24 is directly connected, Vlan60 # 这种类型的路由——标志为“C”的路由，为静态直连路由。 C 192.168.107.0/24 is directly connected, Vlan70 C 192.168.104.0/24 is directly connected, Vlan40 C 192.168.105.0/24 is directly connected, Vlan50 C 192.168.110.0/24 is directly connected, Vlan100 C 192.168.111.0/24 is directly connected, Vlan110 C 192.168.108.0/24 is directly connected, Vlan80 172.16.0.0/30 is subnetted, 1 subnets C 172.16.0.0 is directly connected, Vlan2 C 192.168.115.0/24 is directly connected, Vlan160 C 192.168.113.0/24 is directly connected, Vlan1 C 192.168.112.0/24 is directly connected, Vlan120 C 192.168.102.0/24 is directly connected, Vlan20 C 192.168.103.0/24 is directly connected, Vlan30 C 192.168.100.0/24 is directly connected, Vlan150 C 192.168.101.0/24 is directly connected, Vlan10 S* 0.0.0.0/0 [1/0] via 172.16.0.1 # 为配置的默认路由
TEST#
6、配置交换机的DHCP功能
TEST#sh ip int b # 先显示一下所有的端口配置
Interface IP-Address OK? Method Status Protocol FastEthernet1 unassigned YES NVRAM down down Vlan1 192.168.113.254 YES NVRAM up up Vlan2 172.16.0.2 YES NVRAM up up Vlan10 192.168.101.254 YES NVRAM up up Vlan20 192.168.102.254 YES NVRAM up up Vlan30 192.168.103.254 YES NVRAM up up Vlan40 192.168.104.254 YES NVRAM up up Vlan50 192.168.105.254 YES NVRAM up up Vlan60 192.168.106.254 YES NVRAM up up Vlan70 192.168.107.254 YES NVRAM up up Vlan80 192.168.108.254 YES NVRAM up up Vlan100 192.168.110.254 YES NVRAM up up Vlan110 192.168.111.254 YES NVRAM up up Vlan120 192.168.112.254 YES NVRAM up up # 此例中我们想让vlan120提供DHCP功能 Vlan150 192.168.100.254 YES NVRAM up up Vlan160 192.168.115.254 YES NVRAM up up GigabitEthernet1/1 unassigned YES unset up up GigabitEthernet1/2 unassigned YES unset down down GigabitEthernet1/3 unassigned YES unset down down GigabitEthernet1/4 unassigned YES unset down down GigabitEthernet1/5 unassigned YES unset down down GigabitEthernet1/6 unassigned YES unset down down GigabitEthernet1/7 unassigned YES unset down down GigabitEthernet1/8 unassigned YES unset down down GigabitEthernet1/9 unassigned YES unset down down GigabitEthernet1/10 unassigned YES unset down down GigabitEthernet1/11 unassigned YES unset down down GigabitEthernet1/12 unassigned YES unset down down GigabitEthernet1/13 unassigned YES unset down down GigabitEthernet1/14 unassigned YES unset down down GigabitEthernet1/15 unassigned YES unset up up GigabitEthernet1/16 unassigned YES unset down down GigabitEthernet1/17 unassigned YES unset down down GigabitEthernet1/18 unassigned YES unset down down GigabitEthernet1/19 unassigned YES unset down down GigabitEthernet1/20 unassigned YES unset down down GigabitEthernet3/1 unassigned YES unset up up GigabitEthernet3/2 unassigned YES unset up up GigabitEthernet3/3 unassigned YES unset up up GigabitEthernet3/4 unassigned YES unset up up GigabitEthernet3/5 unassigned YES unset up up GigabitEthernet3/6 unassigned YES unset up up GigabitEthernet3/7 unassigned YES unset up up GigabitEthernet3/8 unassigned YES unset up up
TEST#
TEST#conf t
Enter configuration commands, one per line. End with CNTL/Z.
TEST(config)#ip dhcp pool wlan # 配置交换机的地址池并命名
TEST(config)#network 192.168.112.0 255.255.255.0 # 定义此地址池的网段
TEST(config)#default-router 192.168.112.254 # 定义分发下去的地址的默认网关
TEST(config)#dns-server 202.102.128.68 202.102.134.68
# 定义分发下去地址的DNS服务器，此处是2个中间用空格分隔。
TEST(config)#ip dhcp excluded-address 192.168.112.200 192.168.112.254
# 定义保留的ip地址端
TEST(dhcp-config)#end
TEST#sh run
##小结一下：至此所属这个vlan的客户机就可以通过自动获取地址的方式来得到正确的ip、网关、dns等信息。