Shulou(Shulou.com)06/01 Report--

Advanced! Detailed explanation and experimental steps of medium-sized network architecture DHCP

DHCP:

Dynamic host configuration protocol

Dynamic host configuration protocol

-dynamically configure IP addresses and other related information for the host

DHCP definition: dynamic host configuration protocol

DHCP function:

Automatic configuration and centralized management of IP addresses for a large number of end hosts

Save workload and reduce human configuration errors

DHCP working process:

-device Rol

DHCP server

DHCP client

-how it works:

1.DHCP client sends discover message; broadcast mode

After the 2.DHCP server receives it, it returns an offer message; broadcast mode

3.DHCP client sends request message; broadcast mode

After the 4.DHCP server receives it, it returns an ack message; broadcast mode

The configuration idea of DHCP:

1. Configure the DHCP client

two。 Configure the DHCP server

# enable DHCP function

[R2] dhcp enable # create DHCP address pool * Global address pool [R2] ip pool ABC [R2-ip-pool-ABC] network 192.168.1.0 mask 255.255.255.0 [R2-ip-pool-ABC] gateway-list 192.168.1.254 [R2-ip-pool-ABC] dns-list 8.8.8.8

# determine the DHCP selection mode

-need to be configured on the port that receives messages from the DHCP client

-Command:

[R2] interface gi0/0/0

[R2-gi0/0/0] dhcp select global-> from this interface

All DHCP requests received are directly on the local device.

Address pool (ip pool) is used to get addresses

DHCP server configuration: interface address pool

# enable DHCP function

[R2] dhcp enable

# create a DHCP address pool:

Address pool of the interfac

-use the IP address of the port that receives DHCP messages

The network segment that is located as the IP required by the DHCP client

Address space

-configuration commands:

Interface gi0/0/0

Dhcp server dns-list 8.8.8.8

# determine the DHCP selection mode

When we configure the address pool on the DHCP server is

When it belongs to the "interface type", we are receiving the DHCP

The DHCP selection mode on the port of "message" should be pressed

Configure as follows:

Interface gi0/0/0

Dhcp select interface

=

DHCP Relay:

When the DHCP client is not on the same network segment as the DHCP server

We need to configure DHCP relay

And in general, it is configured under a gateway interface of VLAN

Configuration commands:

-enable DHCP featur

Dhcp enable

-configure DHCP trunk (under gateway interface) interface vlanif 10 ip address 192.168.1.254 255.255.255.0 dhcp select relay dhcp relay server-ip 192.168.12.2

Create the switch VLAN and add the port to the appropriate VLAN

[H1] vlan batch 20 30 40 88

[H1] port-group group-member Gi 0/0/1 to gi 0/0/4

[H1-port-group] port link-type access

[H1-GigabitEthernet0/0/1] port default vlan 88

[H1-GigabitEthernet0/0/2] port default vlan 20

[H1-GigabitEthernet0/0/3] port default vlan 30

[H1-GigabitEthernet0/0/4] port default vlan 40

Dhcp server opens dhcp and creates three address pools

[R1] dhcp enable

[R1] ip pool 20

[R1-ip-pool-20] network 192.168.20.0 mask 255.255.255.0

[R1-ip-pool-20] gateway-list 192.168.20.254

[R1-ip-pool-20] dns-list 8.8.8.8

[R1] ip pool 30

[R1-ip-pool-30] network 192.168.30.0 mask 255.255.255.0

[R1-ip-pool-30] gateway-list 192.168.30.254

[R1-ip-pool-30] dns-list 8.8.8.8

[R1] ip pool 40

[R1-ip-pool-40] network 19 creates the switch VLAN and adds the port to the corresponding VLAN

[H1] vlan batch 20 30 40 88

[H1] port-group group-member Gi 0/0/1 to gi 0/0/4

[H1-port-group] port link-type access

[H1-GigabitEthernet0/0/1] port default vlan 88

[H1-GigabitEthernet0/0/2] port default vlan 20

[H1-GigabitEthernet0/0/3] port default vlan 30

[H1-GigabitEthernet0/0/4] port default vlan 40

Dhcp server opens dhcp and creates three address pools

[R1] dhcp enable

[R1] ip pool 20

[R1-ip-pool-20] network 192.168.20.0 mask 255.255.255.0

[R1-ip-pool-20] gateway-list 192.168.20.254

[R1-ip-pool-20] dns-list 8.8.8.8

[R1] ip pool 30

[R1-ip-pool-30] network 192.168.30.0 mask 255.255.255.0

[R1-ip-pool-30] gateway-list 192.168.30.254

[R1-ip-pool-30] dns-list 8.8.8.8

[R1] ip pool 40

[R1-ip-pool-40] network 192.168.40.0 mask 255.255.255.0

[R1-ip-pool-40] gateway-list 192.168.40.254

[R1-ip-pool-40] dns-list 8.8.8.8

[R1-GigabitEthernet0/0/0] ip add 192.168.88.1 24

[R1-GigabitEthernet0/0/0] dhcp select global

Add VLAN to IP and set DHCP relay mode

[H1] int vlan 20

[H1-Vlanif20] ip add 192.168.20.254 24

[H1-Vlanif20] dhcp select relay

[H1-Vlanif20] dhcp relay server-ip 192.168.88.1

[H1-Vlanif30] ip add 192.168.30.254 24

[H1-Vlanif30] dhcp select relay

[H1-Vlanif30] dhcp relay server-ip 192.168.88.1

[H1-Vlanif40] ip address 192.168.40.254 24

[H1-Vlanif40] dhcp select relay

[H1-Vlanif40] dhcp relay server-ip 192.168.88.1

[H1-Vlanif88] ip add 192.168.88.254 242.168.40.0 mask 255.255.255.0

[R1-ip-pool-40] gateway-list 192.168.40.254

[R1-ip-pool-40] dns-list 8.8.8.8

[R1-GigabitEthernet0/0/0] ip add 192.168.88.1 24

[R1-GigabitEthernet0/0/0] dhcp select global

Add VLAN to IP and set DHCP relay mode

[H1] int vlan 20

[H1-Vlanif20] ip add 192.168.20.254 24

[H1-Vlanif20] dhcp select relay

[H1-Vlanif20] dhcp relay server-ip 192.168.88.1

[H1-Vlanif30] ip add 192.168.30.254 24

[H1-Vlanif30] dhcp select relay

[H1-Vlanif30] dhcp relay server-ip 192.168.88.1

[H1-Vlanif40] ip address 192.168.40.254 24

[H1-Vlanif40] dhcp select relay

[H1-Vlanif40] dhcp relay server-ip 192.168.88.1

[H1-Vlanif88] ip add 192.168.88.254 24

Finally, the ip verification experiment is obtained by host allocation.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.