三层交换实现DHCP功能

qder

vlan da

vlan 10

vlan 20

vlan 30

vlan 40

exit

conf ter

int vlan 10

ip add 192.168.1.1 255.255.255.0

int vlan 20

ip add 192.168.2.1 255.255.255.0

int vlan 30

ip add 192.168.3.1 255.255.255.0

int vlan 40

ip add 192.168.4.1 255.255.255.0

ip routing

ip dhcp excluded-address 192.168.1.1

ip dhcp excluded-address 192.168.2.1

ip dhcp excluded-address 192.168.3.1

ip dhcp excluded-address 192.168.4.1

ip dhcp pool 1

net 192.168.1.0 255.255.255.0

default-ro 192.168.1.1

dns-server 1.1.1.1

ip dhcp pool  2

net 192.168.2.0 255.255.255.0

default-ro 192.168.2.1

dns-server 1.1.1.1

ip dhcp pool  3

net 192.168.3.0 255.255.255.0

default-ro 192.168.3.1

dns-server 1.1.1.1

ip dhcp pool  4

net 192.168.4.0 255.255.255.0

default-ro 192.168.4.1

dns-server 1.1.1.1

exit

SW1:

conf ter

int f0/1

sw acc vlan 10

exit

int f0/2

sw acc vlan 20

exit

int f0/3

sw mode trunk

sw trunk allowed vlan all

exit

SW2:

conf ter

int f0/1

sw acc vlan 30

exit

int f0/2

sw acc vlan 40

exit

int f0/3

sw mode trunk

sw trunk allowed vlan all

exit

测试：

Packet Tracer PC Command Line 1.0

PC>ipconfig /all

FastEthernet0 Connection:(default port)

Physical Address................:0030.F2BB.C910

Link-local IPv6 Address.........:FE80::230:F2FF:FEBB:C910

IP Address......................:192.168.1.2

Subnet Mask.....................:255.255.255.0

Default Gateway.................:192.168.1.1

DNS Servers.....................: 1.1.1.1

DHCP Servers....................:192.168.1.1

PC>ipconfig /release

IP Address......................: 0.0.0.0

Subnet Mask.....................: 0.0.0.0

Default Gateway.................: 0.0.0.0

DNS Server......................: 0.0.0.0

PC>ipconfig /renew

IP Address......................: 192.168.1.2

Subnet Mask.....................:255.255.255.0

Default Gateway.................:192.168.1.1

DNS Server......................: 1.1.1.1

PC>ipconfig /all

FastEthernet0 Connection:(default port)

Physical Address................:0030.F2BB.C910

Link-local IPv6 Address.........:FE80::230:F2FF:FEBB:C910

IP Address......................:192.168.1.2

Subnet Mask.....................:255.255.255.0

Default Gateway.................:192.168.1.1

DNS Servers.....................: 1.1.1.1

DHCP Servers....................:192.168.1.1

PC>ping 192.168.4.2

Pinging 192.168.4.2 with 32 bytes of data:

Request timed out.

Reply from 192.168.4.2: bytes=32 time=0msTTL=127

Reply from 192.168.4.2: bytes=32 time=15msTTL=127

Reply from 192.168.4.2: bytes=32 time=16msTTL=127

Ping statistics for 192.168.4.2:

  Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),

Approximate round trip times inmilli-seconds:

  Minimum = 0ms, Maximum = 16ms, Average = 10ms

PC>ping 192.168.3.2

Pinging 192.168.3.2 with 32 bytes of data:

Request timed out.

Reply from 192.168.3.2: bytes=32 time=0msTTL=127

Reply from 192.168.3.2: bytes=32 time=0msTTL=127

Reply from 192.168.3.2: bytes=32 time=15msTTL=127

Ping statistics for 192.168.3.2:

  Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),

Approximate round trip times inmilli-seconds:

  Minimum = 0ms, Maximum = 15ms, Average = 5ms

PC>ping 192.168.2.2

Pinging 192.168.2.2 with 32 bytes of data:

Request timed out.

Reply from 192.168.2.2: bytes=32 time=16msTTL=127

Reply from 192.168.2.2: bytes=32 time=15msTTL=127

Reply from 192.168.2.2: bytes=32 time=0msTTL=127

Ping statistics for 192.168.2.2:

  Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),

Approximate round trip times inmilli-seconds:

  Minimum = 0ms, Maximum = 16ms, Average = 10ms

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