Re: multiple addresses

From: Berend De Schouwer (bds@jhb.ucs.co.za)
Date: Wed Mar 01 2000 - 08:13:04 EST


I have listed other examples than virtual domains. Plus not all
virtual domains are http domains, and not all http domains run Apache.

The original question was:
- is there a reason for multiple IPs?
- does Linux support it?
The fact that Apache can implement virtual domains differently
does not mean there is exists no reason to either support or have
multiple IPs on one interface.

In fact, I forgot another reason:
- high availability and failover: one machine will take over the IP of
  another in addition to its own.

On 1 Mar, Rommel Rodriguez Rojas wrote:
> But if you have last version of apache you don't need to use ip alias for
> virtual hosts !!!!!!!!!
> just look the httpd.conf and you 'll see directives talking about that .
>
> Berend De Schouwer wrote:
>
>> On 29 Feb, Sharad Joshi wrote:
>> > Folks,
>> >
>> > Is there any specific need of having multiple IP Addresses for a network
>> > interface? And for that matter, does linux support multiple IP addresses
>> > per interface?
>>
>> Yes and yes.
>>
>> Example uses:
>> - virtual domains
>> - migrating IP ranges (can't change 2000 PCs simultaneously)
>> - merging or splitting services on services.
>>
>> Usually, eth0 is first IP, first network card, eth0:0 is second IP,
>> eth0:1 is third IP, etc.
>>
>> > Sharad.
>> >
>> >
>> > -
>> > To unsubscribe from this list: send the line "unsubscribe linux-net" in
>> > the body of a message to majordomo@vger.rutgers.edu
>>
>> --
>> Kind regards,
>> Berend
>>
>> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> Berend De Schouwer, +27-11-712-1435, UCS
>>
>> -
>> To unsubscribe from this list: send the line "unsubscribe linux-net" in
>> the body of a message to majordomo@vger.rutgers.edu
>
> --
> "The reasonable man adapts himself to the world;
> the unreasonable man
> persists to adapt the world to himself.
> Therefore, all progress
> depends on the unreasonable."
>
>

-- 
Kind regards,				  
Berend                                  
                                        
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Berend De Schouwer, +27-11-712-1435, UCS

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