From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 3 Nov 2005 15:33:17 -0800
From: Stephen Hemminger <shemminger@osdl.org>
Subject: Re: [Bridge] Bridge question
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To: Hai Wang <u2.ireland@gmail.com>
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On Thu, 3 Nov 2005 18:17:37 -0500
Hai Wang <u2.ireland@gmail.com> wrote:

>  Stephen,
> 
> Did you mean that the #255 limit is set in 2.4 Kernel, not
> > bridge-utility? I am wondering why there is such limit,
> > performance-related, or...? If I have to modify kernel 2.4 to exceed the
> > limit, can you tell me where I should look at? Any drawback if I increase
> > the limit up to 6000?
> >

Spanning tree protocol has limit on the protocol of 16 bits for port_id.
originally 8 bits were for priority and 8 bits were for port number,
but I added the cheat that vendors were using of using 2 bits of priority
for port number.

-- 
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger