Talk:IEEE 802.1Q/Archive 1

Native and Management VLAN

The Native VLAN and the Management VLAN are not the same. In fact, they should be different in a well-designed LAN. Pgallert (talk) 16:12, 29 April 2008 (UTC)

Oh yes, and while the notion of a "Native VLAN" is an important part of the 802.1Q standard, the idea of "Management VLAN" is not. This rather refers to network design. I gonna be bold. Pgallert (talk) 16:31, 29 April 2008 (UTC)

The management VLAN is any VLAN the administrator chooses to use for remote access with a protocol like SSH. It should be different from the Data or User, Native, Blackhole and Default VLANS as a best practice. You can create the Management VLAN, not by typing any specific command, but instead by creating a layer 3 interface or SVI (Switched Virtual Interface) with an IP Address and setting up an SSH connection. All non management addresses should be restricted from the Management VLAN interface using Access Control Lists and other security features.

Comments

User:Pligwash:umm that only adds up to two bytes. are the remaining two used for the original ethertype?

sort of... the 802.1q tag is added between the source address and type fields of the ethernet frame. It consists of 0x8100 (protocol identifier for 802.1q tagged packet, 2 bytes), priority (3 bits), CFI (1 bit) and VLAN ID (12 bits), total four bytes. So the existing ethertype field is simply "moved up" by 4 bytes. Hope this makes sense... --Ali@gwc.org.uk 20:41, 15 November 2005 (UTC)

I think it's more like the VLAN tag goes right after the ethernet frame, the ethernet type is set to the 0x8100, and the VLAN tag has the encapsulated protocol in it (ie, the 0x0800 for IP or whatever). I think this makes more sense because if you are building a packet from scratch, there is nothing to insert between anything, you just add the ethernet header, vlan header, and then higher-level protocol(s). Greearb (talk) 17:40, 9 September 2008 (UTC)

History

This article needs a history section. The standards documents themselves do not give a revision history. --Kvng (talk) 02:11, 31 August 2010 (UTC)

native VLAN

The write up of native VLAN uses VLAN 2,3,4 and the words "with VLAN 2 being the Native VLAN". I read elsewhere that that the native VLAN has vlan id = 1. Can a knowledgeable person confirm and correct the page if necessary please? — Preceding unsigned comment added by 87.113.81.77 (talk) 17:32, 4 November 2011 (UTC) ..,.. — Preceding unsigned comment added by 203.145.155.11 (talk) 08:18, 4 April 2013 (UTC)

The mention of native VLAN is a misnomer in reference to the IEEE802.1Q-2005 and the IEEE802.1Q-2011 standard. The standard does support a Port VLAN Identifier referred to as a PVID. This PVID may be considered as the default VLAN on a switch port for any untagged frame received on the port. IEEE802.1Q-2011 Standard Amknt (talk) 16:49, 19 April 2013 (UTC)