Linux DHCP Server: Difference between revisions

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cat /etc/network/interfaces  
cat /etc/network/interfaces  
# This file describes the network interfaces available on your system
~
# and how to activate them. For more information, see interfaces(5).
# To Router Interface
 
auto eth1
# The loopback network interface
iface eth1 inet static
auto lo
iface lo inet loopback
 
# WAN Interface
allow-hotplug eth0
iface eth0 inet dhcp
 
# To Router Interface
auto eth1
iface eth1 inet static
         address 172.16.31.254
         address 172.16.31.254
         netmask 255.255.255.0
         netmask 255.255.255.0

Revision as of 20:09, 14 March 2015


Errors

interface name too long

dhcpd -t /etc/dhcp/dhcpd.conf

/etc/dhcp/dhcpd.conf: interface name too long (is 20)

dhcpd -t /etc/default/isc-dhcp-server

/etc/default/isc-dhcp-server: interface name too long (is 28)

tail -f /var/log/message

Mar 14 19:50:49 server dhcpd: No subnet declaration for eth1 (172.16.31.254).
Mar 14 19:50:49 server dhcpd: ** Ignoring requests on eth1.  If this is not what
Mar 14 19:50:49 server dhcpd:    you want, please write a subnet declaration
Mar 14 19:50:49 server dhcpd:    in your dhcpd.conf file for the network segment
Mar 14 19:50:49 server dhcpd:    to which interface eth1 is attached. **
Mar 14 19:50:49 server dhcpd: 
Mar 14 19:50:49 server dhcpd: 
Mar 14 19:50:49 server dhcpd: Not configured to listen on any interfaces!

cat /etc/network/interfaces

~
# To Router Interface
auto eth1
iface eth1 inet static
       address 172.16.31.254
       netmask 255.255.255.0
       network 172.16.31.0
       broadcast 172.16.31.255

This is because the interface set for DHCP does have the subnet defined in a declaration statement in dhcp.conf