A New Internet-Draft is available from the on-line Internet-Drafts
directories.
Title : Private VLANs: Addressing VLAN scalability and security issues in a multi-client environment
Author(s) : S. HomChaudhuri, M. Foschiano
Filename : draft-sanjib-private-vlan-06.txt
Pages : 15
Date : 2007-2-16
This document describes the concept of Layer 2 isolation among
devices that are members of the same Layer 2 domain.
A vlan is a broadcast domain in which all devices can establish
direct communication with one another at Layer 2.
As a consequence, devices that are connected to the same vlan have
an implicit trust relationship with each other. If 'untrusted'
devices are introduced into a vlan, security issues may arise
because trusted and untrusted devices end up sharing the same
broadcast domain.
The traditional solution to this kind of problem is to assign a
separate vlan to each device that is concerned about Layer 2
security issues. That however is not a scalable solution. The
mechanism proposed in this document can offer total Layer 2
isolation between devices connected to the same vlan. What that
means is that, on the one hand, each customer will enjoy the
benefits that come with a separate dedicated vlan, while on the
other hand the service provider will enjoy the benefit of consuming
as few as two vlan identifiers.
Moreover, the scheme described in this document allows end devices
to be Layer 2 isolated while sharing the same IP subnet, which in
turn allows the network designer to employ larger subnets and reduce
the address allocation and management overhead.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-sanjib-private-vlan-06.txt
To remove yourself from the I-D Announcement list, send a message to
i-d-announce-request@ietf.org with the word unsubscribe in the body of
the message.
You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce
to change your subscription settings.
Internet-Drafts are also available by anonymous FTP. Login with the
username "anonymous" and a password of your e-mail address. After
logging in, type "cd internet-drafts" and then
"get draft-sanjib-private-vlan-06.txt".
A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
Internet-Drafts can also be obtained by e-mail.
Send a message to:
mailserv@ietf.org.
In the body type:
"FILE /internet-drafts/draft-sanjib-private-vlan-06.txt".
NOTE: The mail server at ietf.org can return the document in
MIME-encoded form by using the "mpack" utility. To use this
feature, insert the command "ENCODING mime" before the "FILE"
command. To decode the response(s), you will need "munpack" or
a MIME-compliant mail reader. Different MIME-compliant mail readers
exhibit different behavior, especially when dealing with
"multipart" MIME messages (i.e. documents which have been split
up into multiple messages), so check your local documentation on
how to manipulate these messages.
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
- <ftp://ftp.ietf.org/internet-drafts/draft-sanjib-private-vlan-06.txt>
-
_______________________________________________
I-D-Announce@ietf.org
https://www1.ietf.org/mailman/listinfo/i-d-announce
