Linux API to create logical interface on a physical interface?

From: Zarko Coklin (zarko_coklin_at_yahoo.com)
Date: 07/12/04 

Date: 11 Jul 2004 17:20:27 -0700

I am trying to find an API to create a logical interface on a physical
interface. For people familiar with Solaris I am trying to find
replacement for:
ioctl(fd, SIOCLIFADDIF, &if_req,sizeof(struct ifreq)

Does anybody know how to do that on Linux? Comments/code
samples/references are highly appreciated.

Thanks,
Zarko Coklin

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