[66821] in North American Network Operators' Group
Re: Any 1U - 2U Ethernet switches that can handle 4K VLANs?
daemon@ATHENA.MIT.EDU (Scott McGrath)
Mon Jan 26 16:02:53 2004
Date: Mon, 26 Jan 2004 16:00:15 -0500 (EST)
From: Scott McGrath <mcgrath@fas.harvard.edu>
To: nanog@merit.edu
Cc: nanog@merit.edu
In-Reply-To: <84482.1075137035@verdi.nethelp.no>
Errors-To: owner-nanog-outgoing@merit.edu
Both the ISL _and_ the Dotq headers are stripped off at the trunk
interface so they _both_ change the packet size but neither alters the
payload.
Scott C. McGrath
On Mon, 26 Jan 2004 sthaug@nethelp.no wrote:
>
> > 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
>
