Hi Lars, Hmmm....let me explain then.;-) The way a switch can assign VLAN's is upto the administrator's discretion (we can as well have it based on a particular application - layer-7 or any other criteria). However VLAN is a layer-2 thing. Maybe someone else too can join in? A port based VLAN means that in case a packet comes in untagged the VLAN assigned to the packet in a VLAN aware switch is that of the default VLAN Id of the port. In a Mac-based VLAN certain Mac Addresses are assigned to the same Vlan. As far as I know we have support for Mac-Based VLAN in Linux, though I know some flavors do support Port-Based too. Thanks, Vishwas -----Original Message----- From: vlan-bounces@xxxxxxxxxxxxxxx [mailto:vlan-bounces@xxxxxxxxxxxxxxx] On Behalf Of Lars Reimann Sent: Monday, September 27, 2004 6:18 PM To: Linux 802.1Q VLAN Subject: Re: [VLAN] vlan & osi-model thx, but, i really do mean vlan ;) a layer 3 switch can support vlans based on subnet. a layer 2 switch can only support port based or 802.1q based vlan because it cannot look at ip-addresses. are port based vlan really based on osi-layer 1? greetings Vishwas Manral wrote: > Hi Lars, > > I think you mean layer-1 VPN and not Layer-1 VLAN. > > VLAN as I know works on Layer-2 Alone. > > Check the link > http://www.ietf.org/internet-drafts/draft-takeda-l1vpn-framework-01.txt > to find more about Layer-1 VPN. > > Thanks, > Vishwas > > -----Original Message----- > From: vlan-bounces@xxxxxxxxxxxxxxx [mailto:vlan-bounces@xxxxxxxxxxxxxxx] > On Behalf Of Lars Reimann > Sent: Monday, September 27, 2004 5:06 PM > To: Linux 802.1Q VLAN > Subject: [VLAN] vlan & osi-model > > hi all, > > i've a short question about the different vlan operating modes. > > everywhere it says: layer 1 VLAN, layer 2 VLAN, layer 3 VLAN, layer 4-7 > vlan. > > my question is, if vlan layer 1 really corresponds to "OSI-Model Layer 1 > > " VLAN? > > i do understand that layer 2 vlan works with mac-addresses like > osi-model layer 2, and layer 3 vlan inspects ip-adresses for example > forming vlans per subnet. but i cannot imagine how per-port vlan works > on layer1. > > can anyone help? > > _______________________________________________ > Vlan mailing list > Vlan@xxxxxxxxxxxx > http://www.lanforge.com/mailman/listinfo/vlan > > > > _______________________________________________ > Vlan mailing list > Vlan@xxxxxxxxxxxx > http://www.lanforge.com/mailman/listinfo/vlan > -- ------------------------------------- Lars Reimann Praktikant c't Redaktion c't - Magazin f?r Computertechnik Helstorferstr. 7 30625 Hannover Tel.: +49[0]511 5352 300 Fax.: +49[0]511 5352 417 lar@xxxxxxxxxxx www.heise.de/ct _______________________________________________ Vlan mailing list Vlan@xxxxxxxxxxxx http://www.lanforge.com/mailman/listinfo/vlan
