Hi
Currently, i only see the IPSec requirements for end to end frenquency
synchronization for femtocell, femtocell needs to identify the PTP messages
from all the encryped IPSec messages. As mentioned in last tictoc meeting, to
mark the ptp message over IPSec could be the solution on this issue, i hope
group could give more discussion on how to mark PTP messages in IPSec tunnel
messages.
Best Regards
Rock
----- Original Message -----
From: Stefano Ruffini
To: Mikael Abrahamsson ; [email protected]
Sent: Friday, July 30, 2010 8:18 PM
Subject: Re: [TICTOC] Encrypting timing packets
Hi,
This was one of the point that have been highlighted at last tictoc meeting
(see http://www.ietf.org/proceedings/78/slides/tictoc-2.ppt). A possible
approach could be to mark in some way the IPSEC tunnel to inform PTP packets
are carried (e.g. RES bits), and rather than modify the correction field,
implement some sort of control of the delays (this woudl also avoid layer
vialoation issues).
A related discussion was held at last Q13-Q4-Q2 joint meeting in Geneva.
Best Regards
Stefano
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Mikael Abrahamsson
Sent: venerdì 30 luglio 2010 12.10
To: [email protected]
Subject: Re: [TICTOC] Encrypting timing packets
On Fri, 30 Jul 2010, [email protected] wrote:
> Yaakov, Valid point.
>
> I was also thinking about the complexity if timing is part of a
> traffic flow that needs to be encrypted although hadn't really given
> it too much thought. Now think this through I really don't see how
> some form of hop by hop PTP will work in this case without issues.
I believe time can be signed (and encrypted), the per-hop adjustment
information probably cannot.
--
Mikael Abrahamsson email: [email protected]
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