sample dhcp

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huawei AR19/

DHCP config

Posted on January 4, 2012

Lets assume that we have a t

1. IP addresses of ETH 0/respectively.

2. Router B (dhcp client)from DHCP server (rout

01FC.

3. DHCP server assigns172.16.1.1/25 and 172.1

4. DNS server address arespectively.

5. For subnet 172.16.1.12address and address lea

6. For subnet 172.16.1.1/2duration for 10 days.

dhcp configuration

Assign IP addresses to interfa

[RouterA] interface ethe

[RouterA-Ethernet0/1] ip

[RouterA-Ethernet0/1]qui

[RouterA] interface ethe

[RouterA-Ethernet0/2] ip

ConfigureDHCP server:

[RouterA] dhcp enable

CreateDHCP address pool 1

[RouterA] dhcp server ip

[RouterA-dhcp-pool-1] st

9/49 router

ration

pology like in the picture:

and ETH 0/2 on Router A are 172.16.1.128/2

btains static IP address, gateway address and

r A). A MAC address of interface ETH 0/0 of ro

IP addresses to clients in subnet 172.16.1

6.1.128/25.

d WINS server address are 172.16.1.10/25

/25 configure DNS server address, WINS serv

e duration for 6 days and 6 hours.

5 configure DNS server address, gateway addre

es of router A:

rnet 0/1

address 172.16.1.128 25

t

rnet 0/2

address 172.16.1.1 25

ith configured static binding,DNSand gate

-pool 1

atic-bind ip-address 172.16.1.150

5 and 172.16.1.1/25

DNS server address

uter B is 0800-6902-

.0/24 subnetted to

nd 172.16.1.200/25

er address, gateway

ss and address lease

way addresses:

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[RouterA-dhcp-pool-1] static-bind mac-address 0800-6902-01FC

[RouterA-dhcp-pool-1] dns-list 172.16.1.10

[RouterA-dhcp-pool-1] gateway-list 172.16.1.254

Exclude IP addresses of gateways, DNS and WINS servers from dynamic allocation:

[RouterA] dhcp server forbidden-ip 172.16.1.10




Configure DHCP address pool 2 with address range and DNS server address:

[RouterA] dhcp server ip-pool 2

[RouterA-dhcp-pool-2] network 172.16.1.0 mask 255.255.255.0

[RouterA-dhcp-pool-2] dns-list 172.16.1.10

Configure DHCP address pool 3 with address range, gateway and lease duration (DNS

address is inherited from ip-pool 2):


[RouterA-dhcp-pool-3] network 172.16.1.1 mask 255.255.255.128

[RouterA-dhcp-pool-3] expired day 10


Configure DHCP address pool 4 with address range, WINS server address, gateway and lease

duration (DNS address is inherited from ip-pool 2):


[RouterA-dhcp-pool-4] network 172.16.1.128 mask 255.255.255.128[RouterA-dhcp-pool-4] expired day 6 hour 6


[RouterA-dhcp-pool-4] nbns-list 172.16.1.200

After the whole configuration is completed Router B gets 172.16.1.150 IP address from

DHCP server. All remaining DHCP clients obtain IP addresses and other network parameters

from either 172.16.1.1/25 or 172.16.1.128/25 networks (depends on subnet which they reside

in).

display dhcp server ip-in-use command shows IP addresses assigned to DHCP clients.

IP address allocation sequence:

The IP address manually bound to the clients MAC address or ID The IP address that was ever assigned to the client The IP address designated by the Option 50 field in a DHCP-DISCOVER message The first assignable IP address found in an extended or a common address pool The IP address that was a conflict or passed its lease duration

sample dhcp

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