Sponsored Content
Top Forums UNIX for Beginners Questions & Answers Changes in dhcpd.conf do not make a difference in DHCP service behaviour Post 303031905 by bakunin on Thursday 7th of March 2019 06:59:21 AM
Old 03-07-2019
Hi ekorgur and welcome to the forum.

Quote:
Originally Posted by ekorgur
Our dhcpd.conf file stays in /etc directory : /etc/dhcpd.conf
In some server I could see the directory used is /etc/dhcp/ : /etc/dhcp/dhcpd.conf

Do you have any idea who dhcpd service does not use it's conf file?
Perhaps that depends on the type of DHCP-server software you use. It seems the best, IMHO, to look at its man page or other accompanying documentation to resolve that. Actually i have - in various environments - seen both /etc/dhcpd.conf and /etc/dhcpd/dhcpd.conf. If the documentation is unclear about this (i doubt that, but who knows?) you can create /etc/dhcpd/dhcpd.conf as a symlink to /etc/dhcpd.conf and have it both ways.

2 additional thoughts that might or might not be relevant for your problem:

For DHCP to work properly routers in between the server and the client have to be able to work as a "bootp-relay-agent" because the DHCPrequest packets by which the client asks for an IP-address are broadcasts without a source-IP (obviously). See RFC 1533 or its successor RFC2132 "DHCP Options and bootp Vendor Extensions" or RFC1534 "Interoperation Between DHCP and BOOTP". If the two servers are in different subnets this might affect the operation, if they are in the same subnet then this point is moot, of course.

DHCP (as well as bootp, of which DHCP is a superset) allows to base client configuration on MAC-addresses so that a certain client always gets the same config. It is also possible to configure the server so that it ignores all requests not coming from a defined set of such addresses. This might also be a reason why your new system are being ignored.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
 

10 More Discussions You Might Find Interesting

1. Linux

dhcpd.conf

I have intall a REdhat 9.0 as a server and Ive configure to act as a DHCP however Im having technical problems b/c the file /etc/dhcpd.conf does not exists. I went to the text edit and I created : subnet 192.192.168.100.0 netmask 255.255.255.0 { range 192.168.100.10 192.168.100.150;... (1 Reply)
Discussion started by: keliy1
1 Replies

2. Solaris

DHCP Service

Thanks for reply , i realy love using unix ... is there anyone who can give me an instruction to configure DHCP Server in Sun Solaris 10 just a quick guide .. i know how to configure DHCP Server in Windows operating System ..But i want also learn how to configure it from the SUN SOLARIS 10...... (6 Replies)
Discussion started by: giancarlodjabon
6 Replies

3. Shell Programming and Scripting

Shell/Perl Script to edit dhcpd.conf

Hi, I need to get a script together to edit the dhcp service configuration file dhcpd.conf. Mac addresses are defined in classes ex. class "HOST1" { match if substring (hardware, 1,18)=00:11:11:FF:FF:FF;} class "HOST2" ... class "HOST3" ... ... followed by allow or deny statements:... (4 Replies)
Discussion started by: sahilb
4 Replies

4. Linux

dhcpd.conf - static route

Hi, I've setup DHCP Server on RH linux AS3 and everything works fine except static routes. They are not getting effected on client systems. My dhcpd.conf: +++++++++++ ddns-update-style interim; ddns-updates off; option domain-name-servers 192.168.116.122; option domain-name... (3 Replies)
Discussion started by: prvnrk
3 Replies

5. Shell Programming and Scripting

delete dhcp.conf entry using sed

I am trying to use sed to remove entries from my dhcpd.conf file. The form of the file is: host foo { option 1 option 2 } host bar { option 1 option 2 } I was trying to use a label like: sed -e :a -e "s/^host bar {*//g;/{/N;//ba" /etc/dhcpd.conf... (2 Replies)
Discussion started by: tizatron
2 Replies

6. Solaris

Solaris Install over WAN(where to keep wanboot.conf file for DHCP client)

I am trying to configure my jumpstart server to install Solaris 10 on a T1000 machine(target) over WAN. I do not know the IP address of the client, i wish the client to get the IP address from DHCP. how do i configure my /etc/netboot hierarchy. One option would be to keep the wanboot.conf in... (1 Reply)
Discussion started by: hemalsid
1 Replies

7. UNIX for Dummies Questions & Answers

Difference between configure/make/make install.

Hi, While installation of apache on linux, we perform the below tasks. 1) Untar 2) configure 3) make 4) make install. I wanted to understand the difference and working of configure/make/make install. Can any one help me understanding this? Thanks in advance. (1 Reply)
Discussion started by: praveen_b744
1 Replies

8. Shell Programming and Scripting

Help with Perl to change dhcpd.conf file

Hi all, I am too new for this stuff and i am lost in perl tutorials. I need help to change dhcp entries in .conf file with a perl script. The file entries are like below : host bertha-clp-0 { hardware ethernet AA:0A:A0:00:6c:40; fixed-address 10.10.10.72; option... (6 Replies)
Discussion started by: ekckabatop
6 Replies

9. Shell Programming and Scripting

Shell Script to check dhcp conf file

Hi, I have to prepare a script to check the dhcp conf file. The script has to check for a specific parameter called circuit ID. If the Circuit ID is unique it should show the output that it is unique and if it is duplicate it should show that the Circuit ID is duplicate. I have prepared the... (4 Replies)
Discussion started by: Crazy_Nix
4 Replies

10. Shell Programming and Scripting

Listing IPs from the dhcpd.conf

Hy everybody, Within a dhcpd.conf file, we got some fixed IP adresses from 192.168.0.1 - 192.168.0.254. Sample: #ddns-update-style interim; ddns-update-style none; ignore client-updates; deny client-updates; authoritative; #### By red for PXE Booting allow booting; allow bootp; ###... (17 Replies)
Discussion started by: hermouche
17 Replies
dhcp(5) 						Standards, Environments, and Macros						   dhcp(5)

NAME
dhcp - Dynamic Host Configuration Protocol DESCRIPTION
Dynamic Host Configuration Protocol (DHCP) enables host systems in a TCP/IP network to be configured automatically for the network as they boot. DHCP uses a client/server mechanism: servers store configuration information for clients, and provide that information upon a client's request. The information can include the client's IP address and information about network services available to the client. This manual page provides a brief summary of the Solaris DHCP implementation. Solaris DHCP Client The Solaris DHCP client is implemented as background daemon, dhcpagent(1M). This daemon is started automatically during bootup if there exists at least one dhcp.interface file in /etc. Only interfaces with a corresponding /etc/dhcp.interface file are automatically configured during boot. Network parameters needed for system configuration during bootup are extracted from the information recieved by the daemon through the use of the dhcpinfo(1) command. The daemon's default behavior can be altered by changing the tunables in the /etc/default/dhc- pagent file. The daemon is controlled by the ifconfig(1M) utility. Check the status of the daemon using the netstat(1M) and ifconfig(1M) commands. Solaris DHCP Server The Solaris DHCP server is implemented as a background daemon, in.dhcpd(1M). This daemon can deliver network configuration information to either BOOTP or DHCP clients. The Solaris DHCP service can be managed using the dhcpmgr(1M) GUI or the command line utilities dhcpcon- fig(1M), dhtadm(1M), and pntadm(1M). DHCP Configuration Tables The Solaris DHCP server stores client configuration information in the following two types of tables: dhcptab tables Contain macros and options (also known as symbols), used to construct a package of configuration information to send to each DHCP client. There exists only one dhcptab for the DHCP service. The dhcptab(4) can be viewed and mod- ified using the dhtadm(1M) command or dhcpmgr(1M) graphical utility. See dhcptab(4) for more information about the syntax of dhcptab records. See dhcp_inittab(4) for more information about the DHCP options and symbols. DHCP network tables DHCP network tables, which contain mappings of client IDs to IP addresses and parameters associated with those addresses. Network tables are named with the IP address of the network, and can be created, viewed, and modified using the pntadm command or dhcpmgr graphical utility. See dhcp_network(4) for more information about network tables. SEE ALSO
dhcpinfo(1), dhcpagent(1M), dhcpconfig(1M), dhcpmgr(1M), dhtadm(1M), ifconfig(1M), in.dhcpd(1M), netstat(1M), pntadm(1M), syslog(3C), dhcp_network(4), dhcptab(4), dhcpsvc.conf(4), dhcp_inittab(4), dhcp_modules(5) Solaris DHCP Service Developer's Guide Alexander, S., and R. Droms. RFC 2132, DHCP Options and BOOTP Vendor Extensions. Silicon Graphics, Inc. Bucknell University. March 1997. Droms, R. RFC 1534, Interoperation Between DHCP and BOOTP. Bucknell University. October 1993. Droms, R. RFC 2131, Dynamic Host Configuration Protocol. Bucknell University. March 1997. Wimer, W. RFC 1542, Clarifications and Extensions for the Bootstrap Protocol. Carnegie Mellon University. October 1993. SunOS 5.10 13 Mar 2001 dhcp(5)
All times are GMT -4. The time now is 01:59 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy