ASMART

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
#
# DHCP Server Configuration file for route mode CMTS

authoritative;
option domain-name "localdomain";
option domain-name-servers 8.8.8.8,8.8.4.4;
option time-servers 192.53.103.108;
ddns-update-style none;
min-lease-time 2592000;
default-lease-time 2592000;
max-lease-time 2592000;
log-facility local6;

option space PacketCable;
option PacketCable.pri-dhcp code 1 = ip-address;
option PacketCable.sec-dhcp code 2 = ip-address;
option PacketCable.kerberos-realm-name code 6 = text;
option packet-cable code 122 = encapsulate PacketCable;
option PacketCable.pri-dhcp 172.33.55.10;

# interface eth0
subnet 172.33.55.0 netmask 255.255.255.0 {
}

# cm on cmts 2 (arris)
subnet 10.5.0.0 netmask 255.255.0.0 {
option routers 10.5.0.1;
    option routers 10.5.0.1;
    option time-servers 172.33.55.10;
    next-server 172.33.55.10; 
    filename "basic.config.cfg";
    range dynamic-bootp 10.5.10.0 10.5.31.255;

}

# cpe
subnet 10.20.0.0 netmask 255.255.0.0 {
option routers 10.20.0.1;
range dynamic-bootp 10.20.0.0 10.20.31.255;
}

 yum -y install dhcp

Open the file /etc/sysconfig/dhcpd, add the name of the specific interface to the list of DHCPDARGS, for example if the interface is eth0, then add:

DHCPDARGS=eth0

nano /etc/dhcp/dhcpd.conf

add configuration. 

service dhcpd restart

service xinetd restart

service ntpd restart

# default: off
# description: The tftp server serves files using the trivial file transfer \
#  protocol.  The tftp protocol is often used to boot diskless \
#  workstations, download configuration files to network-aware printers, \
#  and to start the installation process for some operating systems.
service tftp
{
        socket_type             = dgram
        protocol                = udp
        wait                    = yes
        user                    = root
        server                  = /usr/sbin/in.tftpd
        server_args             = -s /home/albismart/tftpboot
        disable                 = no
        per_source              = 11
        cps                     = 100 2
        flags                   = IPv4
}

 GNU nano 2.0.9                                                    File: /etc/xinetd.d/daytime-dgram                                                                                                              

# This is the configuration for the udp/dgram daytime service.

service daytime
{
# This is for quick on or off of the service
        disable         = no

# The next attributes are mandatory for all services
        id              = daytime-dgram
        type            = INTERNAL
        wait            = yes
        socket_type     = dgram
#  protocol        =  socket type is usually enough

# This is the configuration for the udp/dgram time service.

service time
{
# This is for quick on or off of the service
        disable         = no

# The next attributes are mandatory for all services
        id              = time-dgram
        type            = INTERNAL
        wait            = yes
        socket_type     = dgram
#  protocol        =  socket type is usually enough

# External services must fill out the following
#  user            =
#  group           =
#  server          =
#  server_args     =

route add -net 10.5.0.0/16 gw 172.33.55.12

route add -net 10.20.0.0/16 gw 172.33.55.12