Tom, see [BB2]
On 28/06/2021 09:41, tom petch wrote:
<at the bottom tp>
From: Int-area <[email protected]> on behalf of Bob Briscoe
<[email protected]>
Sent: 27 June 2021 22:22
James,
[First apologies to everyone for asking the question then not following
up on the answers until now - I went off line for a while.]
See inline tagged [BB]...
On 10/06/2021 13:09, James Bensley wrote:
On Wed, 9 Jun 2021 at 15:57, Derek Fawcus
<[email protected]> wrote:
On Wed, Jun 09, 2021 at 03:07:41PM +0200, James Bensley wrote:
On Wed, 9 Jun 2021 at 14:05, Giles Heron <[email protected]> wrote:
Re BT specifically (and again my info is outdated and may be mis-remembered)
the 20C network used L2TP, and I think it’s an option on 21C for handoff to
smaller ISPs. Should all be in the SINs somewhere?
I work in the UK ISP sector. I can confirm that L2TP is in wide spread
use for wholesale services by all major ISPs (except Liberty). I think
the real question here (unless I've misunderstood) is not "is L2TP
being used" but "is L2TP being used AND sequencing is being used
and/or enforced?" - is that understanding correct?
Yes.
In that case - sequencing isn't used for BT Wholesale services.
[BB] Thank you. It sounds like you have some reason for your certainty
here. Can you elaborate on what makes you so certain sequencing isn't used?
<tp>
Perhaps a coincidence or perhaps not, but an I-D has just been posted
Author : Yogesh Nautiyal
Filename : draft-nautiyal-l2tpext-tunnel-ka-control-channel-00.txt
which uses L2TP sequencing, I note the author has an affiliation of Juniper.
[BB] Thanks for pointing this out. It's quite normal and expected for
L2TP to use its sequencing facility for a control channel. I'm not
concerned about that. My original question was scoped to IP as data.
But thanks anyway. Cheers
Bob
The draft would need a fair bit of work.
Tom Petch
Bob
Cheers,
James.
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