headers
Jari Arkko | 3 Jul 2006 11:31

Re: Last Call: 'Transport of Ethernet Frames over L2TPv3' to Proposed Standard (draft-ietf-l2tpext-pwe3-ethernet)

Authors, WG,

Do we have answers / suggested text for Dan's issues below?
If possible, I would like to get an agreed resolution to this
by Wednesday, before the next IESG telechat.

Thanks,

--Jari

Romascanu, Dan (Dan) wrote:

>I have a few questions related to the use of the terms Ethernet and VLAN
>in this I-D: 
>
>1. The I-D speaks about 'Ethernet' but does not provide any reference.
>What version of the Ethernet standard is targeted here? The latest
>approved version of the Ethernet standard is IEEE Std 802.3-2005, but
>the IEEE 802.3 WG also has in works an extension of the frame size as
>IEEE 802.3as. One cannot talk about Ethernet PDU and MTU without a
>proper reference. 
>2. The I-D speaks about 'Ethernet VLAN'. Strictly speaking there is no
>such thing, Virtual LANs are being defined by IEEE 802.1 and not only
>for Ethernet. However accepting terminology license based on the
>de-facto reality that most if not all VLANs run over Ethernet, there
>still is a need to specify if the document refers to IEEE 802.1Q VLANs
>(one 12-bit tag) or IEEE 802.1ad which accommodate multiple tags and
>introduce the concepts of Customer VLAN and Service VLAN. Maybe the
>VLANs referred in this I-D are transparent to the type of VLANs that are
>being connected, but even so there should be text explaining this.
(Continue reading)

Permalink | Reply | 751 comments |
headers
Javi | 13 Jul 2006 12:22
Picon

Changing HDLC Timers in Remote Systems

Another question related to transport of HDLC (or LAPB) frames over L2TPv3:

HDLC identifies a number of timers that may be used by an HDLC link 
(which is operating in the reliable ABM Mode) to provide reliable data 
transmission, such as the Acknowledgement Timer (T1).

According RFC 4349 (HDLCPWs over L2TPv3), depending on the quality of 
the link between the LCCEs, the HDLC expiration times may need tweaking 
though.

If so, it may need a PSN with excellent QoS or to change HDLC timers in 
HDLC terminales (Remote System for RFC 4349), but the last, changing all 
terminals, is not a viable solution, I think.

Javi
Permalink | Reply | 24 comments |
headers
Ignacio Goyret | 24 Jul 2006 20:04
Picon
Favicon

Re: HDLC Timers

At 09:30 6/30/2006 +0200, Javi wrote:
>And another question. Terminals have usually setup a value for the L2 
>timers. If you need "tweaking though" them, it would have to be done in 
>all the terminals, which doesn't seem rasonable. And, generally,  L2 
>timers negotiation is not implemented. Which is the solution of 
>L2TPv3+PWE then?

The solution is to make sure the network between the LCCEs is properly
engineered so you won't have to worry about HDLC timers.

If the network does not have any SLAs of any kind, the network response
may be random. In situations like these, your only choice may be to adjust
the appropriate HDLC timers, thus the comment on the draft.

HTH,
-Ignacio
Permalink | Reply | 0 comments |
headers
Internet-Drafts | 24 Jul 2006 21:50
Picon
Favicon

I-D ACTION:draft-ietf-l2tpext-radius-ext-nas-port-00.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Layer Two Tunneling Protocol Extensions Working Group of the IETF.

	Title		: RADIUS & L2TP Extended NAS-Port AVPs
	Author(s)	: T. Mistretta, et al.
	Filename	: draft-ietf-l2tpext-radius-ext-nas-port-00.txt
	Pages		: 14
	Date		: 2006-7-24
	
This document defines additional Layer 2 Transfer Protocol (L2TP) and
Remote Authentication Dial In User Service (RADIUS) Attribute-Value
Pairs (AVPs) to communicate Network Access Server (NAS) informational
ASCII text and port usage information between L2TP peers during call
establishment to facilitate authorization, accounting and logging.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-l2tpext-radius-ext-nas-port-00.txt

To remove yourself from the I-D Announcement list, send a message to 
i-d-announce-request <at> 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-ietf-l2tpext-radius-ext-nas-port-00.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html
(Continue reading)

Permalink | Reply | 0 comments |

Gmane