Visit Our UNIX and Linux User Community


configuring more than one ip for an inteface pemanently (linux)


 
Thread Tools Search this Thread
Special Forums IP Networking configuring more than one ip for an inteface pemanently (linux)
# 1  
Old 02-04-2002
configuring more than one ip for an inteface pemanently (linux)

Hi
does anybody know how we can add more than one ip for NIC(in Redhat Linux 7.2)?
i usually do it by using this command
ifconfig eth0 add <ip addresss> netmask <..............> up


or ;

ip address add 192.168.20.1/24 dev eth0


or
adding it manually to file in /etc/sysconfig/network-scripts
but their is no ifcfg-eth0 !!!!!
-------------------------------------------------------------
and it works cuz i can ping it from another machine


BUT when i reboot the machine all of the are gone.
I'm looking for way that these IPs can remain on the interface even after
reboot or shut down

is there anyone who can help me up?

Last edited by hessam; 02-05-2002 at 03:24 AM..
# 2  
Old 02-04-2002
Which vendor/version of Linux? Under RedHat the information goes into a config file in /etc/sysconfig/network-scripts.
# 3  
Old 02-05-2002
thanx

i found the file in /etc/sysconfig/networking/devices/ifcfg-eth0

and here i can add the new ip and after reboot everything is ok.

but i don't know how i can have it changed without rebooting and
more important that that i want to add more than one ip for this
interface.
Can anyone help me up?
# 4  
Old 02-19-2002
What you need to do is to add an alias to the interface, in order to do that, do the following. First go to the file /etc/sysconfig/networking/devices/ifcfg-eth0 and add the following lines:

DEVICE=eth0:1
ONBOOT=yes
BOOTPROTO=static
IPADDR= xxx.xxx.xxx.xxx
NETMASK=xxx.xxx.xxx.xxx
GATEWAY=xxx.xxx.xxx.xxx
TYPE=Ethernet
USERCTL=no
NETWORK=xxx.xxx.xxx.xxx
BROADCAST=xxx.xxx.xxx.xxx
PEERDNS=no
Where xxx.xxx.xxx.xxx put the apropriate addresses for your computer. After doing so go to the directory /etc/rc.d/init.d and type ./network stop; ./network start. That will initiate the new configurations. You can add as many IP addresses as you want by just doing the procedures above and changing the DEVICE:eth0:x from 1 to 2,3,... etc. and also by changing the IP address.

Last edited by developer; 02-19-2002 at 02:40 PM..
# 5  
Old 02-22-2002
Thank you very much

It really worked . and the idea is very reasonble.
You know what I did to have more than 2 IPs?

I put the following commands in the start up (rc.local):
ip address add x.x.x.x/x dev eth0

and it works but it's a bit .... I don't like it.





Thanks anyway
# 6  
Old 02-25-2002
You re wellcome. You can also add an alias to your interface with ifconfig. You can write ifconfig eth0:x <IP ADDRESS> netmask <NETMASK>. But then you must add with route a default gateway to your routing table for the new IP address.
# 7  
Old 02-26-2002
Thank YOU again
yeah I tried it ,cool ....

But it is not perminantt after network stop / start
They'll be gone.

Could you please tell me why the hell do we have so many places to
assign IPs,gateways,... and which one's the main file or ....

thanx

Previous Thread | Next Thread
Test Your Knowledge in Computers #768
Difficulty: Medium
Smart cache, developed by AMD, is a level 2 or level 3 caching method for multiple execution cores
True or False?

10 More Discussions You Might Find Interesting

1. Red Hat

Dot matrix Printer configuring on Linux RHEL AS 5.1

Dear Experts, We have requirement to configure Dot matrix printer in linux, Also need to register in Oracle application R12.0.6 version where i need get the print in landscape format. Request you all kindly help on the same. Thank you, Alone. ---------- Post updated 02-18-14 at 01:02... (6 Replies)
Discussion started by: Alone
6 Replies

2. IP Networking

Configuring DNS Server in Linux Redhat

Can someone help with a detail step-by-step oh how to configure DNS server on Linux Server. - I need to have 3 IP addresses map to a single hostname. for clients I'm a Linux rookie. Thanks Oscar (1 Reply)
Discussion started by: FrankOscar
1 Replies

3. Infrastructure Monitoring

Configuring SNMP in linux

I am trying to enabling SNMP access and trap forwarding for Linux(RHEL5) using following official url from IBM. http://publib.boulder.ibm.com/infocenter/eserver/v1r2/index.jsp?topic=/diricinfo/fqm0_t_enabling_snmp_access_and_trap_forwarding_for_linux.html In my system, snmp and snmplibs are... (1 Reply)
Discussion started by: SiddhV
1 Replies

4. IP Networking

Configuring Linux as a firewall

i have a linux server runnig oracle applications. i need to access this server from putty using ssh through internet. i did by registering my static ip with the dnydns.org and i am able to connect to the server. but now there is no security to authenticate any user as any one knowing the... (6 Replies)
Discussion started by: u.n.i.x
6 Replies

5. UNIX for Advanced & Expert Users

configuring NTP in Solaris/Windows/Linux environment.

Can anybody please explain the below table to monitor NTP daemon status This contains many columns like remote,refid,st....various values corresponding to those columns If possible provide me any link to study about these quantities clearly. It is very much required for my project please... (3 Replies)
Discussion started by: sgand
3 Replies

6. AIX

How to find the active network inteface on etherchannel

I have a server with multiple network interfaces. 2 of these interfaces, lets say en2 and en6 make up an etherchannel interface, which let's say en8. when I run the command lsattr -El ent8 I can see the designated primary and backup interfaces as ent6 and ent2, in the given order. But... (10 Replies)
Discussion started by: thenomad
10 Replies

7. Red Hat

Problem with configuring host name in Redhat Linux 5

Hi All when I give the command, $ ping <hostname> I get the following error ping: unknown host <hostname> I have checked in the following files, /etc/sysconfig/network /etc/hosts /etc/resolv.conf /etc/nsswitch.conf Every where in these files host name and IP address are given... (2 Replies)
Discussion started by: nagapradeep
2 Replies

8. Solaris

how to know inteface name in ULTRA 20

hi friends, I have brand new Sun Ultra 20 WS installed. It was preinstalled with Solaris 10 6/06 system, in ifconfig -a command only loop back intervace is showing. and /etc/path_to_install also not able to find the interface name. my questions are: 1. Is there any command to get... (1 Reply)
Discussion started by: subhankar
1 Replies

9. Shell Programming and Scripting

configuring 2-gateways in linux

Hi, I want to configure 2-gateways in Linux . Please tell me how I can achieve this. I am accesing 2-internet connection through these 2-gateways. So I am looking that if 1-gets down then also other one is working. Regards JAGDISH (1 Reply)
Discussion started by: jagdish.machhi@
1 Replies

10. Linux

Configuring USB in Red Hat Linux 9

Had problems in configuring USB memory stick in RHL 9. Please assist. With regards, Kungra. (1 Reply)
Discussion started by: kungra2006
1 Replies

Featured Tech Videos