Linux Ethernet Bridging - Apr 2007 - [Bridge] max number of enslaved devices

On Thu, 17 Mar 2005 12:32:55 +0200
"Osama Abu Elsorour" <osama@wayout.net> wrote:
> What is the maximum number of devices that can be enslaved in a bridge
> interface?
> 
> I have tried enslaving 512 devices. Although the brctl tool did not
complain
> while adding them, when I use brctl show command it only shows 255.
> 
> Thanks
> 
Depends on the kernel version.  With the 2.6 kernel and current bridge
utilities,
the sysfs interface (/sys) is used and it can handle a infinite number of
devices
because it walks the subdirectory /sys/class/net/br0/port to see the enslaved
devices. The older interface was limited by the response buffer size of the
ioctl.

What is the maximum number of devices that can be enslaved in a bridge
interface?

I have tried enslaving 512 devices. Although the brctl tool did not complain
while adding them, when I use brctl show command it only shows 255.

Thanks