On Fri, 23 Feb 2001, Peter Jeremy wrote:
> >http://www.euitt.upm.es/~pjlobo/fbsdvlan.html
>
> That's where I got my code last August. I haven't looked to see what
> has changed since then. I know I have patches for:
> - set the "Long Receive OK" bit in the i82559 (fxp) [rather than
> rummage through "error packets"]
This is now in the vlan patches.
> - VLAN support in driver modules for the above drivers
Including fxp? My code only supports vlan in modules for the 558 and 559
controllers, not for the old 557.
> - fix VLAN handling in arp(8)
Can you ellaborate a bit more on this one?
> - support VLANs in tcpdump(8) [this may be in the generic tree by now]
It's been for quite some time. I used it when doing my first version of
the patches on a 3.2-stable system.
> > Also, do I have any
> >performance hits if I have too many vlans ?
>
> On incoming 802.1Q packets, there's a linear search through a list of
> known VLAN numbers to determine the destination vlan device. Unless
> you're planning on lots of VLAN's, this probably isn't an issue.
That makes sense. A linear search through 10 or 20 elements doesn't seem
like a performance killer. And, provided that most switches won't support
more than 16 or 32 vlans, it is very unusual to have more than that.
--
Pedro José Lobo Perea Tel: +34 913367819 / Fax: +34 913319229
Centro de Cálculo e-mail: [EMAIL PROTECTED]
E.U.I.T. Telecomunicación Universidad Politécnica de Madrid
Ctra. de Valencia, Km. 7 E-28031 Madrid - España / Spain
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