Sponsored Content
Operating Systems Linux Red Hat Purpose of Static IP address through DHCP Post 302534010 by Lazydog on Sunday 26th of June 2011 12:44:00 PM
Old 06-26-2011
Here is the thought process;

DHCP is use for mobile devices which could/do move around form one network to another, i.e., Laptops.

Static is used for device that would not move around, i.e., Servers, Desktops and Printers.

If your network is growing then any new device that is static would get a static IP address for the new network. Mobile device connecting to the new network would get a DHCP address from the new network.

I guess if you are working for Mom & Pop you don't need to think this way but in an environment of 6000+ employees and 10000+ devices, using DHCP for static is not going to cut it.

Here is another thing to think about. Just because you map an ip address to a MAC address doesn't mean the machine is going to be assigned to that device. MAC spoofing ring any bells? This is why you want devices that provide a serves to have a static IP Address not some sort of DHCP static.

At the end of the day it all comes down to what you prefer. I prefer static devices to have static addresses and mobile devices to have DHCP addresses. If you cannot see far enough into the future to plan ahead for a growing network.......
 

10 More Discussions You Might Find Interesting

1. HP-UX

HP-UX 10.xx Changing from static IP to DHCP

***Newbie alert*** What's the easiest way to accomplish this? An admin left our company and I have taken over his HP Workstation and moved it to a different location that is on a different IP segment. I have performed a number of google searches but the steps I have followed haven't worked. ... (1 Reply)
Discussion started by: Steelysteel
1 Replies

2. IP Networking

dhcp and static ip conflicts.

I have a USB Wireless Adapter using the rum0 driver. All I want to do is set a perminent static IP for the onboard wired interface elxl0. I can plumb the wired interface up fine on the fly, but when I try to save the static IP over a reboot, I lose the IP address assigned to rum0 from my wireless... (1 Reply)
Discussion started by: ts97783
1 Replies

3. IP Networking

How to configure DHCP to Static IP

I am pretty new to this. My router was earlier configured to enable DHCP, thus my UNIX box is using the dhcp address, i.e. I have to do a ifconfig dhcp hme0 start. Since I am planning to use my NT as a web server, I needed to use the static IP address. How do I configure the unix box to use the... (5 Replies)
Discussion started by: lee30320
5 Replies

4. IP Networking

Switching from DHCP to Static IP

I am trying to write a set of scripts for my Ubuntu 810 Server to allow a user to change from DHCP to a user-supplied Static IP, Subnet, Gateway and DNS Servers. So far I have the following, where $USERCHOICE is a user-entered value in each case: ifconfig eth0 down && ifconfig eth0 $USERCHOICE... (1 Reply)
Discussion started by: cleanden
1 Replies

5. Red Hat

How to know whether my system is using DHCP or STATIC IP

Hi, I am using RHEL 5.1 and i would like to know, how to find the whether my system is using DHCP or STATIC IP with out looking at /etc/sysconfig/network-scripts/ifconfig-eth0 configuration file. Regards, Venkat (3 Replies)
Discussion started by: venkat55
3 Replies

6. UNIX for Dummies Questions & Answers

How to tell if i am using DHCP or Static

Hey guys , YEs this is probably silly for most but i am new to this forum and solaris . i am curious to know if the ip address we have for our solaris server is static or dhcp . how can i tell ? will ifconfig -a tell me this ? or other commands? Thanks in advance (1 Reply)
Discussion started by: xdrivex
1 Replies

7. HP-UX

[Solved] Static or DHCP IP in HP-UX

Hi, I can find the IP details whether it is Static or dynamic in Linux machine from the location /etc/sysconfig/network-scripts/ifconfig-eth0 configuration file. Can someone suggest a location to find the same in HP UX machines? -Vivek (2 Replies)
Discussion started by: vkk
2 Replies

8. IP Networking

Get DHCP relay interfaces IP address using DHCP

Hi All , please view the set up below: ------------------------------------------------------------------- | DHCP Server |-----------| ROUTER & |-----------| Clients | | 192.168.99.1 | - -<eth1>| DHCP-RELAY|<eth2>-- | 192.168.88.X | ... (2 Replies)
Discussion started by: gdangoor
2 Replies

9. IP Networking

Node switched itself from static to DHCP on reboot issue

I'm trying to figure out what circumstances would cause an Open Solaris 11.2 host to switch itself from a static to a DHCP ip address upon reboot. This has only happened once but is a cause for some concern as this machine will be part of a web server pool. Nothing has changed on the LAN that... (2 Replies)
Discussion started by: SmokeyJoe
2 Replies

10. Solaris

Solaris static IP changed (non DHCP)

We have 2 solaris 10 t5240 servers with static IP addresses on nxge0 I/F which were rebooted a few days back with a known good config that has been in place for years (for /etc/hosts, /etc/hostname.nxge0, /etc/netmasks, etc) They are not using dhcp. About the same time today, both of their... (7 Replies)
Discussion started by: hdatontodo
7 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 09:18 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy