Re: [netext] Stephen Farrell's Discuss on draft-ietf-netext-update-notifications-08: (with DISCUSS and COMMENT)

"Sri Gundavelli (sgundave)" <sgundave@cisco.com> Tue, 24 September 2013 13:27 UTC

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From: "Sri Gundavelli (sgundave)" <sgundave@cisco.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
Thread-Topic: Stephen Farrell's Discuss on draft-ietf-netext-update-notifications-08: (with DISCUSS and COMMENT)
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Date: Tue, 24 Sep 2013 13:27:43 +0000
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Cc: "netext@ietf.org" <netext@ietf.org>, "draft-ietf-netext-update-notifications@tools.ietf.org" <draft-ietf-netext-update-notifications@tools.ietf.org>, "netext-chairs@tools.ietf.org" <netext-chairs@tools.ietf.org>
Subject: Re: [netext] Stephen Farrell's Discuss on draft-ietf-netext-update-notifications-08: (with DISCUSS and COMMENT)
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Stephen,


On 9/24/13 5:56 AM, "Stephen Farrell" <stephen.farrell@cs.tcd.ie> wrote:

>
>Hiya,
>
>On 09/24/2013 01:53 PM, Sri Gundavelli (sgundave) wrote:
>>Hi Stephen,
>>Thanks for the reviews.
>>>5.2: What happens if the IPsec SA is re-negotiated
>>Renegotiation of IPSec SA should result in updated SPD and PAD entries at
>>both the peers. Wondering, if MAG/LMA entities need to be aware of this,
>>or assume IKEv2/IPsec layer is handling that. SA Renegotiation could
>>potentially occur in the base protocol without this extension as well.
>>I'm
>>thinking, as long as the SPD entries cover the new MH type, the
>>handling/validation is happening at the correct layers and no new checks
>>are needed.
>
>Perhaps those checks are already needed. What is currently done
>in implementations?


Not beyond ensuring that the MH message that made it to the MIP layer had
IPSec protection. There are no special interactions between MIP and IPsec
layer, at least not in PMIP. For CMIP, there is lot of dance in 5555, for
supporting NAT traversalŠthere they both almost live together ...


>
>But is the current text about "same SA" correct? I don't recall
>such text in the base spec, but maybe its there. And presumably
>re-negotiation is more likely when pushing notifications.


Can rephrase this to suggest, "currently established Security Association
for protecting PBU/PBA Š"

Regards
Sri