On 10/20/2011 1:39 AM, Cui Yang wrote:
> As I have noted in the last email, timestamping all packets is too
costly to afford to. We have done some experiments on our products, the
degrading of performance is unacceptable. That is why we need to
distinguish 1588 packet from others with high priority
On 10/19/2011 10:09 PM, Cui Yang wrote:
[...]
> 1. Most doubts have been cast on the rationale of encryption. Thanks
to comments by Tim and others, this requirement comes from 3GPP spec.,
as explained in the Introduction, where it says that 3GPP spec. SHALL
support encryption/tunnel in backhaul lin
On 10/19/2011 7:50 AM, Bhatia, Manav (Manav) wrote:
> Hi,
>
> I had spoken to one of the initial authors of this IPsec draft and I
was told that setting up an Ipsec tunnel exclusively for shipping 1588
may not be possible in the femto architecture. They are thus trying to
use WESP (that I have co-
On 10/18/2011 3:33 PM, Nico Williams wrote:
> On Tue, Oct 18, 2011 at 12:45 PM, Kevin Gross wrote:
>> Nico's contention is that it should take a constant amount of time to
>> decrypt a packet once it is received. I don't think this is exactly true but
>> when compared to other (variable) latencies
On 10/18/2011 2:16 PM, paul_kon...@dell.com wrote:
> Absolutely. But if you allow, say, one second round trip time, you have
> to assume that your time is off by that amount from the master.
No, half that amount. Round trip means exactly that!
In an
> environment without active attackers you w
On 10/18/2011 12:42 PM, Kevin Gross wrote:
> It does seem reasonable to consider modeling encryption and decryption
> in as part of network latency. As long as delays introduced are the same
> each direction, the sync protocols will naturally subtract out this
> contribution.
I very much doubt tha
On 10/18/2011 11:37 AM, Tim Frost wrote:
> I think most of the reviewers are missing the point of this draft.
>
> The point is not that the timing packets are inherently secret and
need encryption, but that the 3GPP architecture mandates that EVERYTHING
flowing to the femtocell must be inside a se
On 10/15/2011 9:29 PM, Nico Williams wrote:
> On Fri, Oct 14, 2011 at 7:19 PM, David L. Mills wrote:
>> Nico and Danny,
>>
>> It might help to explain the issues in the NTP white papers at the NTP
>> project page www.eecis.udel.edu./ntp.html. Chapter 16 in the book shows the
>> results of experime
--Original Message-
> From: tictoc-boun...@ietf.org [mailto:tictoc-boun...@ietf.org] On Behalf Of
> Danny Mayer
> Sent: Thursday, October 13, 2011 5:08 PM
> To: Kevin Gross
> Cc: ipsec@ietf.org; tic...@ietf.org; Cui Yang; David L. Mills
> Subject: Re: [TICTOC] Review request f
and decrypted when sent making
for additional uncertainties and errors. I have not reviewed how the
two-step IEEE 1588 protocol works so I don't have a good understanding
of the effects of IPsec encryption on such packets.
Danny
> Kevin Gross
>
> On Thu, Oct 13, 2011 at 8:43 AM, Danny
On 9/18/2011 9:41 PM, Cui Yang wrote:
> Dear IPsec experts,
> cc TICTOC WG
>
> May I make a review request for the draft on
> "IPsec security for packet based synchronization"
>
> http://datatracker.ietf.org/doc/draft-xu-tictoc-ipsec-security-for-synchronization/
>
> Abstract:
> Cellular network
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