dhcp中繼鏈路實驗
中繼鏈路的應用場景:
通常在dhcp分配網段過多的情況下,閘道器路由器上配置dhcp服務,壓力過大,一般我們用第二路由器,或則第二台dhcp伺服器來分擔業務
交換機配置命令:
sys[huawei]sys sw1
[sw1]v b 10 20
[sw1]inte***ce e0/0/01
[sw1-ethernet0/0/1]p l a
[sw1-ethernet0/0/1]p d v 10
[sw1-ethernet0/0/1]un sh
[sw1-ethernet0/0/1]p d v 10
[sw1-ethernet0/0/1]inte***ce e0/0/2
[sw1-ethernet0/0/2]p l a
[sw1-ethernet0/0/2]p d v 20
[sw1-ethernet0/0/2]un sh
[sw1-ethernet0/0/2]int e0/0/3
[sw1-ethernet0/0/3]p l a
[sw1-ethernet0/0/3]p d v 10
[sw1-ethernet0/0/3]un sh
[sw1-ethernet0/0/3]int e0/0/4
[sw1-ethernet0/0/4]p l a
[sw1-ethernet0/0/4]p d v 20
[sw1-ethernet0/0/4]un sh
[sw1-ethernet0/0/4]int g0/0/1
[sw1-gigabitethernet0/0/1]p l t
[sw1-gigabitethernet0/0/1]p t a v 10 20
[sw1-gigabitethernet0/0/1]un sh
交換機的命令就很簡單,就是配置介面,然後g介面配置了trunk鏈路
路由器配置命令:
sys[huawei]sys r1
[r1]dhcp enable
[r1]int g0/0/1.10 配置子介面位址
[r1-gigabitethernet0/0/1.10]dot1q termination vid 10
[r1-gigabitethernet0/0/1.10]ip add 192.168.10.1 24
[r1-gigabitethernet0/0/1.10]arp broadcast enable
[r1-gigabitethernet0/0/1.10]dhcp select relay 基於dhcp中繼
[r1-gigabitethernet0/0/1.10]dhcp relay server-ip 14.0.0.2 去14.0.0.2請求dhcp服務
[r1-gigabitethernet0/0/1.10]q
[r1]int g0/0/1.20
[r1-gigabitethernet0/0/1.20]dot1q termination vid 20
[r1-gigabitethernet0/0/1.20]ip add 192.168.20.1 24
[r1-gigabitethernet0/0/1.20]arp broadcast enable
[r1-gigabitethernet0/0/1.20]dhcp select relay
[r1-gigabitethernet0/0/1.20]dhcp relay server-ip 14.0.0.2
[r1-gigabitethernet0/0/1.20]q
[r1]int g0/0/1
[r1-gigabitethernet0/0/1]un sh
[r1-gigabitethernet0/0/1]q
[r1]int g0/0/0
[r1-gigabitethernet0/0/0]ip add 12.0.0.1 24
[r1-gigabitethernet0/0/0]un sh
[r1-gigabitethernet0/0/0]int g0/0/2
[r1-gigabitethernet0/0/2]ip add 14.0.0.1 24
[r1-gigabitethernet0/0/2]un sh
[r1-gigabitethernet0/0/2]q
[r1]ip route-static 15.0.0.0 24 12.0.0.2
sys[huawei]sys r2
[r2]dhcp enable
[r2]int g0/0/0
[r2-gigabitethernet0/0/0]ip add 14.0.0.2 24
[r2-gigabitethernet0/0/0]dhcp select global
[r2-gigabitethernet0/0/0]q
[r2]ip pool dhcp15 這裡的15並非是乙個定值,可以隨意輸入
[r2-ip-pool-dhcp15]network 15.0.0.0 mask 24
[r2-ip-pool-dhcp15]gateway-list 15.0.0.1
[r2-ip-pool-dhcp15]dns-list 8.8.8.8 2.2.2.2
[r2-ip-pool-dhcp15]excluded-ip-address 15.0.0.100 15.0.0.200 配置位址池的範圍
[r2-ip-pool-dhcp15]static-bind ip-address 15.0.0.88 mac-address 5489-98ff-79ce 這裡繫結的mac位址,如無必要,可以不用繫結
[r2-ip-pool-dhcp15]q
[r2]ip pool dhcpv10
[r2-ip-pool-dhcpv10]network 192.168.10.0 mask 24
[r2-ip-pool-dhcpv10]gateway-list 192.168.10.1
[r2-ip-pool-dhcpv10]dns-list 8.8.8.8
[r2-ip-pool-dhcpv10]q
[r2]ip pool dhcpv20
[r2-ip-pool-dhcpv20]network 192.168.20.0 mask 24
[r2-ip-pool-dhcpv20]gateway-list 192.168.20.1
[r2-ip-pool-dhcpv20]dns-list 8.8.8.8 dns的解析位址,為了做實驗,也可以隨意配置,不過8.8.8.8和114.114.114.114是國際上都可以用的位址,生產環境中也可以使用
[r2-ip-pool-dhcpv20]q
[r2]ip route-static 0.0.0.0 0.0.0.0 14.0.0.1 這裡為了方便(其實就是為了偷懶),配置了預設路由
sys[huawei]sys r3
[r3]int g0/0/0
[r3-gigabitethernet0/0/0]ip add 12.0.0.2 24
[r3-gigabitethernet0/0/0]un sh
[r3-gigabitethernet0/0/0]q
[r3]dhcp enable
[r3]int g0/0/1
[r3-gigabitethernet0/0/1]ip add 15.0.0.1 24
[r3-gigabitethernet0/0/1]dhcp select relay
[r3-gigabitethernet0/0/1]d r s 14.0.0.2
[r3-gigabitethernet0/0/1]q
[r3]ip route-static 0.0.0.0 0.0.0.0 12.0.0.1
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