Re: Any 1U - 2U Ethernet switches that can handle 4K VLANs?

[haesu () towardex com]

        welcome to 2004. ISL is a thing of the past. let us move on.
        ./end_flamebait.sh

-J (who realized Cisco no longer supports ISL on 2950 and some other newer box)

On Mon, Jan 26, 2004 at 11:09:07PM -0800, Alexei Roudnev wrote:
> So what?  Is is a sugnificant drawback? I do not think so. Both ISL and
> 802.1q require special interface cards (with extended frame size), and I do
> not see any reason, why 26 bytes vs 4 bytes makes big difference. /May be,
> the only pro for 802.1q tagging is it's possible  implementation on the old
> interface cards, which did not allowed extra 30 bytes but allowed extra 4
> bytes/.
>
> I am no saying that ISL is better tha 802.1q, but 802.1q is not much better
> than ISL, and (in some cases) is even worst.
>
>
> ----- Original Message ----- 
> From: <sthaug () nethelp no>
> To: <alex () relcom net>
> Cc: <nanog () merit edu>
> Sent: Monday, January 26, 2004 9:10 AM
> Subject: Re: Any 1U - 2U Ethernet switches that can handle 4K VLANs?
>
>
> > > ISL _DOES NOT CHANGE_ packet size.
> >
> > An 802.1q tag adds 4 bytes to the Ethernet frame.
> >
> > ISL encapsulation adds 30 bytes to the Ethernet frame.
> >
> > Steinar Haug, Nethelp consulting, sthaug () nethelp no

-- 
James Jun (formerly Haesu)
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