I've used ndd to increase the default to support 1000 vip's before and
have not noticed any performance issues. So it won't hurt your server.
It really just comes down to the application that will use the NIC. If
it can co-exist with other apps on the same NIC and not cause any
bottlenecks, you shouldn't have any issues.

Octave


--- James Carlson <[EMAIL PROTECTED]> wrote:

> vijayanand writes:
> > Can anyone let me know whether there is any limitaion on the number
> > of Logical Units/Ip address that can be association with a single
> > network physical interface.
> 
> Yes.  The limit is set by the ip_addrs_per_if ndd variable.  The
> default limit is 256, but can be increased to 8192:
> 
>       ndd -set /dev/ip ip_addrs_per_if 8192
> 
> This variable has a bit of an odd history.  The kernel uses AVL trees
> for interfaces, and so should scale fairly nicely with huge numbers
> of
> interfaces.  I believe the limit is there mostly to protect
> _application_ programs, many[1] of which will perform atrociously or
> just fall over dead with an excessive number of interfaces.
> 
> [1] No list here ... "you know who you are."  ;-}
> 
> -- 
> James Carlson, KISS Network                   
> <[EMAIL PROTECTED]>
> Sun Microsystems / 1 Network Drive         71.232W   Vox +1 781 442
> 2084
> MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442
> 1677
> _______________________________________________
> opensolaris-discuss mailing list
> opensolaris-discuss@opensolaris.org
> 


*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Octave J. Orgeron
Solaris Systems Engineer
http://www.opensolaris.org/os/community/sysadmin/
http://unixconsole.blogspot.com
[EMAIL PROTECTED]
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

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