Cisco Switch DHCP Server 이중화 설정

• SW1 VRRP Configuration

Switch>en
Switch#conf t
Switch(config)#logging console 0
Switch(config)#hostname SW1
SW1(config)#int vlan 10
SW1(config-if)#ip add 192.168.10.2 255.255.255.0		//IP 설정
SW1(config-if)#vrrp 10 ip 192.168.10.1		//VIP 설정
SW1(config-if)#vrrp 10 priority 150		//우선순위 설정(기본값 100)
SW1(config-if)#vrrp 10 preempt		//우선순위가 높으면 Master
SW1(config-if)#no shu
SW1(config-if)#end
SW1#wr		//저장

• SW2 VRRP Configuration

Switch>en
Switch#conf t
Switch(config)#logging console 0
Switch(config)#hostname SW2
SW2(config)#int vlan 10
SW2(config-if)#ip add 192.168.10.3 255.255.255.0		//IP 설정
SW2(config-if)#vrrp 10 ip 192.168.10.1		//VIP 설정
SW2(config-if)#vrrp 10 preempt		//우선순위가 높으면 Master
SW2(config-if)#no shu
SW2(config-if)#end
SW2#wr		//저장

• SW1 DHCP Server Configuration

SW1(config)#ip dhcp pool VLAN10
SW1(dhcp-config)#network 192.168.10.0 255.255.255.0
SW1(dhcp-config)#default-router 192.168.10.1
SW1(dhcp-config)#lease 0 4 0
SW1(dhcp-config)#exit
SW1(config)#ip dhcp excluded-address 192.168.10.1 192.168.10.10

• SW2 DHCP Server Configuration

SW2(config)#ip dhcp pool VLAN10
SW2(dhcp-config)#network 192.168.10.0 255.255.255.0
SW2(dhcp-config)#default-router 192.168.10.1
SW2(dhcp-config)#lease 0 4 0
SW2(dhcp-config)#exit
SW2(config)#ip dhcp excluded-address 192.168.10.1 192.168.10.10

• VPC Configuration

VPCS> ip dhcp
DORA IP 192.168.10.12/24 GW 192.168.10.1

• SW1 shutdown

• VPC - SW2 통신확인

VPCS> sh ip

NAME        : VPCS[1]
IP/MASK     : 192.168.10.12/24
GATEWAY     : 192.168.10.1
DNS         : 
DHCP SERVER : 192.168.10.2
DHCP LEASE  : 14089, 14400/7200/12600
MAC         : 00:50:79:66:68:04
LPORT       : 20000
RHOST:PORT  : 127.0.0.1:30000
MTU         : 1500

VPCS> ping 192.168.10.1

84 bytes from 192.168.10.1 icmp_seq=1 ttl=255 time=3.601 ms
84 bytes from 192.168.10.1 icmp_seq=2 ttl=255 time=4.196 ms
84 bytes from 192.168.10.1 icmp_seq=3 ttl=255 time=3.565 ms
84 bytes from 192.168.10.1 icmp_seq=4 ttl=255 time=3.720 ms
84 bytes from 192.168.10.1 icmp_seq=5 ttl=255 time=3.858 ms

VPCS>