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DHCP - PowerPoint PPT Presentation


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DHCP. DHCP. DHCP. DHCP. DHCP (Dynamic Host Configuration Protocol) is a network service that enables clients to obtain network settings (IP Address, Subnet Mask, Default Gateway, DNS Server, Hostname and Domain) automatically from a central server

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PowerPoint Slideshow about 'DHCP' - rhea


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slide1

DHCP

DHCP

slide2

DHCP

DHCP
  • DHCP (Dynamic Host Configuration Protocol) is a network service that enables clients to obtain network settings (IP Address, Subnet Mask, Default Gateway, DNS Server, Hostname and Domain) automatically from a central server
  • The DHCP client sends a broadcast request to find the DHCP server and the DHCP server in the subnet responds with an IP address (and other common network parameters) from a pool of IP addresses
  • The IP address can be bound to the MAC address of the client
  • Daemon: dhcpd Lease file: /var/lib/dhcp/dhcpd.leases
dhcp server configuration

DHCP

DHCP Server Configuration
  • Configuration File: /etc/dhcpd.conf

subnet 172.28.0.0 netmask 255.255.0.0 {

authoritative;

option routers 172.28.1.254;

option subnet-mask 255.255.0.0;

option domain-name "iitk.ac.in";

option domain-name-servers 172.31.1.1;

range 172.28.4.2 172.28.7.254;

default-lease-time 7200;

max-lease-time 10800;

host tc1 {

hardware ethernet 00:80:64:1A:E9:14;

fixed-address 172.28.120.32;

}

}

dhcp client configuration

DHCP

DHCP Client Configuration
  • Configure the Network Configuration to pickup network settings from DHCP server
  • /etc/sysconfig/network-scripts/ifcg-eth0

BOOTPROTO=dhcp (static)

  • Applications  System Settings  Network
slide5

NIS Server Setup

NIS SERVER SETUP

network information service

NIS Server Setup

Network Information Service
  • Directory Service for Centralized Authentication and Accounting
  • The NIS server and all NIS clients are members of a NIS domain
  • Single Master Server and Multiple Slave Servers
  • Uses ypserv, yppasswdd and ypbind daemon (also uses portmap and rpc service)
nis server configuration

NIS Server Setup

NIS Server Configuration
  • Edit File /etc/sysconfig/network and add

NISDOMAIN=<mynisdomain>

  • Build NIS maps by running

/usr/lib/yp/ypinit –m

(ypserv should be running)

  • service ypserv start/stop/restart
  • service yppasswdd start/stop/restart
nis client configuration

NIS Server Setup

NIS Client Configuration
  • Specify NIS Server and NIS Domain
    • /etc/yp.conf

domain <mynisdomain> server <nis server IP>

    • /etc/nsswitch.conf

passwd: files nis

shadow: files nis

group: files nis

    • /etc/sysconfig/network

NISDOMAIN=<mynisdomain>

  • service ypbind start/stop/restart
nis troubleshooting

NIS Server Setup

NIS Troubleshooting
  • Use ypwhich to find and verify which server a client is bound to, if any
  • Use ypcat to verify that correct NIS data is available.

ypcat passwd | more