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How to configure DHCP on a 3550
- Thread starter myng94
- Start date
Here is a basic Config if you ahve the correct ios.
Config
A Cisco router can be configured as a DHCP server to assign IP addresses. The range of IP addresses which can be given out is called a 'pool'. From this pool clients are leased addresses for a given time, after which the lease expires and the client needs to request a new IP address lease.
The following config lines show how to setup a DHCP pool of addresses in the 192.168.0.0 IP range:
no ip dhcp conflict logging
ip dhcp excluded-address 192.168.0.1 192.168.0.50
!
ip dhcp pool 1
network 192.168.0.0 255.255.255.0
default-router 192.168.0.100
domain-name network.co.uk
dns-server 192.168.0.1 19 194.168.8.100
next-server 192.168.0.1
The config above also shows how to set the Default Gateway and DNS Servers which are assigned to clients.
The Ethernet address of the switch is "00:07:eb:94:73:c0" and I wanted to assign a manual IP address 192.168.0.100 to it. So I declared:
ip dhcp pool switch
host 192.168.0.99
hardware-address 0007.eb94.73c0
client-name switch
default-router 192.168.0.100
dns-server 192.168.0.1 194.168.8.100 194.168.4.100
next-server 192.168.0.1
Afterwards, as I did a "show ip dhcp binding" on the router, I get the following results:
Router#sh ip dhcp binding
IP address Client-ID/ Lease expiration Type
Hardware address
192.168.0.51 0100.02b3.91f7.34 Apr 05 2003 06:14 AM Automatic
192.168.0.53 0100.0423.468b.31 Apr 05 2003 08:42 AM Automatic
192.168.0.69 0100.0423.4682.ab Apr 05 2003 07:15 AM Automatic
192.168.0.99 0007.eb94.73c0 Infinite Manual
Config
A Cisco router can be configured as a DHCP server to assign IP addresses. The range of IP addresses which can be given out is called a 'pool'. From this pool clients are leased addresses for a given time, after which the lease expires and the client needs to request a new IP address lease.
The following config lines show how to setup a DHCP pool of addresses in the 192.168.0.0 IP range:
no ip dhcp conflict logging
ip dhcp excluded-address 192.168.0.1 192.168.0.50
!
ip dhcp pool 1
network 192.168.0.0 255.255.255.0
default-router 192.168.0.100
domain-name network.co.uk
dns-server 192.168.0.1 19 194.168.8.100
next-server 192.168.0.1
The config above also shows how to set the Default Gateway and DNS Servers which are assigned to clients.
The Ethernet address of the switch is "00:07:eb:94:73:c0" and I wanted to assign a manual IP address 192.168.0.100 to it. So I declared:
ip dhcp pool switch
host 192.168.0.99
hardware-address 0007.eb94.73c0
client-name switch
default-router 192.168.0.100
dns-server 192.168.0.1 194.168.8.100 194.168.4.100
next-server 192.168.0.1
Afterwards, as I did a "show ip dhcp binding" on the router, I get the following results:
Router#sh ip dhcp binding
IP address Client-ID/ Lease expiration Type
Hardware address
192.168.0.51 0100.02b3.91f7.34 Apr 05 2003 06:14 AM Automatic
192.168.0.53 0100.0423.468b.31 Apr 05 2003 08:42 AM Automatic
192.168.0.69 0100.0423.4682.ab Apr 05 2003 07:15 AM Automatic
192.168.0.99 0007.eb94.73c0 Infinite Manual
- Status
