IP aliasing

IP aliasing

[Ravi Kumar Munnangi]

I want to give more than one IP addresses to my NIC.
For this we have to enable the feature of IP alias
when configuring the kernel and recompile it.
Is there any way to check if the option is already
checked or not?
My next question is,
  After reconfiguring and recompiling, how can I give
IP addresses(aliases) to NIC?
  please tell me the commands to be used.

  Ravi kumar

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Re: IP aliasing

[Eugene Teo]

Hi,

A little off-topic, but...

you don't have to enable ip alias. you can simply use
(1) ifconfig or (2) iproute2 tool.

iproute2's ip command is more convenient.

464  # ip link set dev $DEV up
465  # ip addr add dev $DEV w.x.y.z/24
466  # ip addr add dev $DEV p.q.r.s/16
467  # ip route add $DESTINATION via $GATEWAY src p.q.r.s 

Eugene
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main(i){putchar(182623909>>(i-1)*5&31|!!(i<7)<<6)&&main(++i);}

<quote sender="Ravi Kumar Munnangi">
> I want to give more than one IP addresses to my NIC.
> For this we have to enable the feature of IP alias
> when configuring the kernel and recompile it.
> Is there any way to check if the option is already
> checked or not?
> My next question is,
>   After reconfiguring and recompiling, how can I give
> IP addresses(aliases) to NIC?
>   please tell me the commands to be used.
> 
>   Ravi kumar
> 
> __________________________________
> Do you Yahoo!?
> SBC Yahoo! DSL - Now only $29.95 per month!
> http://sbc.yahoo.com
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> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive:       http://mail.nl.linux.org/kernelnewbies/
> FAQ:           http://kernelnewbies.org/faq/
> 

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Re: IP aliasing

[Master_PE]

On Wednesday 18 June 2003 16:03, Ravi Kumar Munnangi wrote:
> I want to give more than one IP addresses to my NIC.
> For this we have to enable the feature of IP alias
> when configuring the kernel and recompile it.
> Is there any way to check if the option is already
> checked or not?
> My next question is,
>   After reconfiguring and recompiling, how can I give
> IP addresses(aliases) to NIC?
>   please tell me the commands to be used.


Look for 7.4. IP Aliasing at Linux Networking HOWTO

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Re: IP aliasing

[Ravi]

Hi Ravi,

       Load the IP Alias module (you can skip this step if you compiled 
the module into the kernel):

/sbin/insmod /lib/modules/`uname -r`/ipv4/ip_alias.o




Setup the loopback, eth0, and all the IP addresses beginning with the 
main IP address for the eth0 interface:

for example:

/sbin/ifconfig lo 127.0.0.1
/sbin/ifconfig eth0 up
/sbin/ifconfig eth0 172.16.3.1
/sbin/ifconfig eth0:0 172.16.3.10
/sbin/ifconfig eth0:1 172.16.3.100



Setup the routes. First route the loopback, then the net, and finally, 
the various IP addresses starting with the default (originally 
allocated) one:

/sbin/route add -net 127.0.0.0
/sbin/route add -net 172.16.3.0 dev eth0
/sbin/route add -host 172.16.3.1 dev eth0
/sbin/route add -host 172.16.3.10 dev eth0:0
/sbin/route add -host 172.16.3.100 dev eth0:1
/sbin/route add default gw 172.16.3.200


Enjoy,
Ravi

Ravi Kumar Munnangi wrote:
> I want to give more than one IP addresses to my NIC.
> For this we have to enable the feature of IP alias
> when configuring the kernel and recompile it.
> Is there any way to check if the option is already
> checked or not?
> My next question is,
>   After reconfiguring and recompiling, how can I give
> IP addresses(aliases) to NIC?
>   please tell me the commands to be used.
> 
>   Ravi kumar
> 
> __________________________________
> Do you Yahoo!?
> SBC Yahoo! DSL - Now only $29.95 per month!
> http://sbc.yahoo.com
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive:       http://mail.nl.linux.org/kernelnewbies/
> FAQ:           http://kernelnewbies.org/faq/
> 


-- 


The views presented in this mail are completely mine. The company is not
responsible for whatsoever.
------------------------------------------------------------------------
Ravi Kumar CH
Rendezvous On Chip (i) Pvt Ltd
Hyderabad, India
Ph: +91-40-2335 1214 / 1175 / 1184

ROC home page <http://www.roc.co.in>



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