2.4.x IP aliase max eth0:16 (16 aliases), where to change?

2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[Noel Koethe]

Hello,

The maximum aliases I can configure with a 2.4.x kernel is 16, right?

Where I can change this? I want to use more aliases.
linux/Documentation/networking/alias.txt tells nothing about this limit
and how to change it.

Thank you.

-- 
	Noel

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[Mike Fedyk]

On Tue, Aug 07, 2001 at 10:41:27PM +0200, Noel Koethe wrote:
> Hello,
> 
> The maximum aliases I can configure with a 2.4.x kernel is 16, right?
> 
> Where I can change this? I want to use more aliases.
> linux/Documentation/networking/alias.txt tells nothing about this limit
> and how to change it.
> 

I would stop using the ifconfig aliases now, and start using the iproute
(ip) command that was introduced with the 2.2 kernels.

Someone correct me if I'm wrong, but I don't think you will have trouble
with more than 16 aliases then.

Mike

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[Justin Guyett]

On Tue, 7 Aug 2001, Mike Fedyk wrote:

> I would stop using the ifconfig aliases now, and start using the iproute
> (ip) command that was introduced with the 2.2 kernels.

Plus such aliases are much less ugly.  Deleting one will never delete all
others, and maintenence doesn't rely on knowing the alias number of a
particular ip address.

however, afaict, ip provides no way to force link type, and some other
link-layer settings also seem to be missing.


justin

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[J Sloan]

Noel Koethe wrote:

> Hello,
>
> The maximum aliases I can configure with a 2.4.x kernel is 16, right?

er... I would expect you could do thousands....
It's really a matter of how much RAM and CPU
you have -

> Where I can change this? I want to use more aliases.
> linux/Documentation/networking/alias.txt tells nothing about this limit
> and how to change it.

I haven't seen any such limit - heck, I had over 200
ethernet aliases on a 2.0.x slackware box back in 1996 -

cu

jjs

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[Dan Podeanu]

> > The maximum aliases I can configure with a 2.4.x kernel is 16, right?
>
> er... I would expect you could do thousands....

Where did you come up with that '16' actually? Why not 3? 17? 100?

Right now I'm running with 2.4.6-ac5, eth0 and 20 aliases for it
(eth0:1..eth0:20). As expected, it didn't complain nor did anything
different for 17th, as opposed to 16th interface. Perhaps you're running
some old net tools/ifconfig, if you tested at all that is.

I have:
net-tools 1.59
ifconfig 1.40 (2000-05-21)

Cheers, Dan.

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[john slee]

On Tue, Aug 07, 2001 at 10:41:27PM +0200, Noel Koethe wrote:
> The maximum aliases I can configure with a 2.4.x kernel is 16, right?

$ /sbin/ifconfig -a | grep -c eth0:
55

and i'm an anti-twiddle person.  i've certainly never seen any limit on
this here.  i've heard of people with hundreds or even thousands of
aliases...

j.

-- 
"Bobby, jiggle Grandpa's rat so it looks alive, please" -- gary larson

Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?

[David Lang]

at least with previous versions it took a kernel source tweak to get more
then 255 aliases.

David Lang

On Wed, 8 Aug 2001, john slee wrote:

> Date: Wed, 8 Aug 2001 17:23:59 +1000
> From: john slee <indigoid@higherplane.net>
> To: Noel Koethe <noel@koethe.net>
> Cc: linux-kernel@vger.kernel.org
> Subject: Re: 2.4.x IP aliase max eth0:16 (16 aliases), where to change?
>
> On Tue, Aug 07, 2001 at 10:41:27PM +0200, Noel Koethe wrote:
> > The maximum aliases I can configure with a 2.4.x kernel is 16, right?
>
> $ /sbin/ifconfig -a | grep -c eth0:
> 55
>
> and i'm an anti-twiddle person.  i've certainly never seen any limit on
> this here.  i've heard of people with hundreds or even thousands of
> aliases...
>
> j.
>
> --
> "Bobby, jiggle Grandpa's rat so it looks alive, please" -- gary larson
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