DYNAMIC HOST CONFIGURATION PROTOTCOL DAEMON IN REDHAT LINUX

DYNAMIC HOST CONFIGURATION PROTOTCOL DAEMON

Features:
1. Provides automatic configuration of IPv4 clients
•IPv4 address
•Subnet mask
•Default gateway
•DNS Servers
•NTP Servers
•WINS Servers

2. Leases the addreses and related information based on predefined values:
•1 day
•1 week
•1 month

3. DHCP uses UDP protocol and layer-2 information to request/assign addresses

4. DHCP Process - DORA
•Discovery - client broadcasts on the local subnet for a DHCP server
•Offer - returned by the DHCP server
•Request - formal address request by client
•Acknowledgement/Acceptance - Acknowledgement occurrs

Note: DHCPD records leases in: /var/lib/dhcpd/dhcpd.leases

Tasks:

1. Install DHCP server
•yum -y install dhcp

2.Configure: /etc/dhcpd.conf - primary config file

3. Set service up to start when system boots
•chkconfig dhcpd on - 2345

4. Disable service on 192.168.75.100 box
•rcdhcpd stop

5. Start service on localhost:
•service dhcpd start

6. Setup DHCP reservation

•Requires the MAC address of the client (00:0C:29:B5:16:92)
•Requires the 'fixed-address' - IPv4 address to map to the MAC address
•Optional 'option-*' are supported between host { } block
•service dhcpd restart - restart to effect changes