How to setup dhcp with multiple scoops on single nic card

Nov-26th-2010

Hi,

I have added 3 networks on single nic card. And it works for me.

[root@map007~]# ifconfig

eth0 Link encap:Ethernet HWaddr 00:1C:C0:9E:58:94

inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0

inet6 addr: fe80::21c:c0ff:fe9e:5894/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:207456 errors:0 dropped:0 overruns:0 frame:0

TX packets:153054 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:70309118 (67.0 MiB) TX bytes:21958886 (20.9 MiB)

eth0:1 Link encap:Ethernet HWaddr 00:1C:C0:9E:58:94

inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

eth0:2 Link encap:Ethernet HWaddr 00:1C:C0:9E:58:94

inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[root@map007~]# yum install dhcp

Open your dhcpd.conf file, you need to edit this file depending on your network.

This is my dhcpd.conf file :-

ddns-update-style interim;

ignore client-updates;

shared-network mynetwork{

subnet 192.168.0.1 netmask 255.255.255.0 {

# — default gateway

option routers 192.168.0.1;

option subnet-mask 255.255.255.0;

option nis-domain “example.com”;

option domain-name “example.com”;

option domain-name-servers 192.168.0.1;

option time-offset -18000; # Eastern Standard Time

option ntp-servers 192.168.0.5;

# option netbios-name-servers 192.168.1.1;

# — Selects point-to-point node (default is hybrid). Don’t change this unless

# — you understand Netbios very well

# option netbios-node-type 2;

range dynamic-bootp 192.168.0.10 192.168.0.254;

default-lease-time 21600;

max-lease-time 43200;

# we want the nameserver to appear at a fixed address

host ntpserver {

hardware ethernet 00:27:0E:2C:23:5B;

fixed-address 192.168.0.5;

}

}

subnet 192.168.1.0 netmask 255.255.255.0 {

# — default gateway

option routers 192.168.1.1;

option subnet-mask 255.255.255.0;

option nis-domain “example.com”;

option domain-name “example.com”;

option domain-name-servers 192.168.1.1;

option time-offset -18000; # Eastern Standard Time

option ntp-servers 192.168.0.5;

# option netbios-name-servers 192.168.1.1;

# — Selects point-to-point node (default is hybrid). Don’t change this unless

# — you understand Netbios very well

# option netbios-node-type 2;

range dynamic-bootp 192.168.1.10 192.168.1.250;

default-lease-time 21600;

max-lease-time 43200;

# we want the nameserver to appear at a fixed address

}

subnet 192.168.2.0 netmask 255.255.255.0 {

# — default gateway

option routers 192.168.2.1;

option subnet-mask 255.255.255.0;

option nis-domain “example.com”;

option domain-name “example.com”;

option domain-name-servers 192.168.2.1;

option time-offset -18000; # Eastern Standard Time

option ntp-servers 192.168.0.5;

# option netbios-name-servers 192.168.1.1;

# — Selects point-to-point node (default is hybrid). Don’t change this unless

# — you understand Netbios very well

# option netbios-node-type 2;

range dynamic-bootp 192.168.2.10 192.168.2.250;

default-lease-time 21600;

max-lease-time 43200;

min-secs 5;

}

}