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Old 04-30-2012, 08:09 AM   #1
daigle.ne
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Registered: Apr 2012
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Having problems with DHCP config


i'm currently in a Linux server class. installed & configured DHCP, the config file is as follows:

subnet 10.1.1.20 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;
option routers 10.1.1.254;
option domain-name-servers 10.1.1.10, 10.1.1.20;
option domain-name "cpt161-02-04.local";
default-lease-time 518400;
max-lease-time 691200;
}

When I restart the service, I keep getting the output "bad subnet number/mask combination. That is the ip address and subnet mask of the server I installed DHCP on so I don't understand the problem. Help plz?

Last edited by daigle.ne; 04-30-2012 at 08:28 AM.
 
Old 04-30-2012, 08:34 AM   #2
linuxlover.chaitanya
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Registered: Apr 2008
Location: Nagpur, India
Distribution: Cent OS 5/6, Ubuntu Server 10.04
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Change
Code:
subnet 10.1.1.20 netmask 255.255.255.0
To this and try
Code:
subnet 10.1.1.0 netmask 255.255.255.0
 
1 members found this post helpful.
Old 04-30-2012, 08:37 AM   #3
em31amit
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you are using wrong network and subnet mask. you should use a network mask in SUBNET field not a actual IP address.

#RIGHT
subnet 10.1.1.0 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;



#WRONG
subnet 10.1.1.20 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;

Thanks,
em31amit
Amit M.
 
1 members found this post helpful.
Old 04-30-2012, 08:38 AM   #4
daigle.ne
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I actually just tried that before you posted. It seem to work when I restart the service, but when I go to my client and issue the command "sudo dhclient eth0" i get no output, so I can't verify my configurations worked.
 
Old 04-30-2012, 08:41 AM   #5
linuxlover.chaitanya
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Check if your client got the network information from the server.
 
Old 04-30-2012, 08:46 AM   #6
em31amit
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check what your client and server /var/log/messages file saying ....
 
Old 04-30-2012, 08:55 AM   #7
linuxlover.chaitanya
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Also check the dhcpd.leases file located usually in /etc. If you do not find it, search for the file. It should contain all the leases the server has given to the clients.
 
  


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