Re: [AVTCORE] WG last call on draft-ietf-avtcore-6222bis-01

[Magnus Westerlund <[e-mail]>]

WG & Authors,

I have reviewed this document as an individual and have the following
comments:

1. Section 4.2, second bullet:

      To produce a short-term persistent RTCP CNAME, an RTP endpoint
      MUST either (a) use the numeric representation of the layer-2
      (Media Access Control (MAC)) address of the interface that is used
      to initiate the RTP session as the "host" part of its RTCP CNAME
      or

Is using the MAC really that unique? In these days of MAC cloning is
this good enough to use as long term persistent CNAME identifier? I also
wonder of its persistence behavior as it says to use the MAC of the
Interface that ones initiate the communication over. With multiple
interfaces, I can in the context of an application use all of these
interfaces over a set of calls. Thus it doesn't have particular good
long term stability either.

Should this option simply be removed? Or at least some discussion of
these deficiencies?

2. Section 6.1:

Secure RTP (SRTP) [RFC3711] keeps unauthorized entities out of an RTP
   session, but it does not aim to prevent impersonation attacks from
   unauthorized entities.

Shouldn't the last "unauthorized" be "authorized". Unauthorized packets
will never be processed where the impersonation matters.


Otherwise this looks good.

Cheers

Magnus


On 2013-03-12 20:04, Magnus Westerlund wrote:
> WG,
> 
> This is to announce the start of a WG last call on:
> 
> Guidelines for Choosing RTP Control Protocol (RTCP) Canonical Names
> (CNAMEs) to be published as a proposed standard.
> 
> Document can be retrieved here:
> https://datatracker.ietf.org/doc/draft-ietf-avtcore-6222bis/
> 
> Please provide any feedback by the 31st of March.
> 
> Regards
> 
> Magnus Westerlund
> WG chair
> 
> 
> ----------------------------------------------------------------------
> Multimedia Technologies, Ericsson Research EAB/TVM
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> 


-- 

Magnus Westerlund

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Multimedia Technologies, Ericsson Research EAB/TVM
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Ericsson AB                | Phone  [phone]
Färögatan 6                | Mobile [phone]
SE-164 80 Stockholm, Sweden| mailto: [e-mail]
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