Re: [irs-discuss] IRS comments

Thomas Nadeau <> Wed, 08 August 2012 23:26 UTC

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From: Thomas Nadeau <>
To: Lin Han <>, Gert Grammel <>, Lenny Giuliano <>, Alia Atlas <>
Date: Wed, 8 Aug 2012 19:21:58 -0400
Thread-Topic: IRS comments
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Subject: Re: [irs-discuss] IRS comments
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On 8/8/12 7:14 PM, "Lin Han" <>; wrote:

>Similar confusion by wisely avoidance -:)
>If possible, Someone can draw a simple picture of IRS location in a
>router with existence of other components.

	Did you see the slides that Alia sent out from the IETF Presentation?
Unicast me if not and I will get them to you.

>Also, I think people are confused by the comparison with SDN and OF. More
>clarification will be helpful.

	For that, we really should set up some internal tech talk thing. Slides
can help, but having a decent presentation on this would go a long way.
Let me see what we can do in this regard.


>-----Original Message-----
>From: []
>On Behalf Of Gert Grammel
>Sent: Monday, July 30, 2012 6:41 PM
>To: Thomas Nadeau; Lenny Giuliano; Alia Atlas
>Subject: Re: [irs-discuss] IRS comments
>It is confusing to understand whether IRS belongs to a new network
>management plane or if it's more of a control plane extension. The draft
>wisely avoids this classification.
>To me IRS appears to be a completely different beast which should best be
> characterized as 'Network Programming Plane' NPP.
>It neither aims to do full provisioning (as a management plane would do)
>nor aims to replace routing (as a control plane would do).
>Hence we better name the baby NPP -- thereby avoiding any linkage to
>----- Original Message -----
>From: <>;
>To: Lenny Giuliano; Alia Atlas
>Cc: <>;
>Sent: Tue Jul 31 01:50:40 2012
>Subject: Re: [irs-discuss] IRS comments
>[Re-adding IRS]
>	Thank you for reviewing and the comments. We will incorporate the edits
>in the next rev.
>	--Tom
>On 7/30/12 5:04 PM, "Lenny Giuliano" <>; wrote:
>>Minor points:
>>-section 4, para 2, 3rd sentence, "Howeve,r"
>>-4.1.3 "There is no bidirectional programmatic interface to add, modify,
>>    remove or read state from the multicast RIB."
>> 	-How is this unique to mcast?  Couldn't you say the same thing
>> 	about unicast?
>>-4.1.3 "The multicast state added need not match to well-known protocol
>>    installed state.  For instance, traffic received on an specified set,
>>    or all, interfaces that is destined to a particular prefix from all
>>    sources or a particular prefix could be subject to the specified
>>    replication."
>> 	-Not clear to me at all what this para is saying.
>>-"IRS"- you may want to select a different acronym that isn't related to
>>something as unpopular as taxation (something we learned with AMT).
>>RSI instead...
>>Overall, I found the doc to be clearly written and straightforward.
>>Sounds like Openflow for routers.  Not sure if it's intentional that you
>>didn't mention Openflow, but it did seem like an elephant in the room as
>>was reading thru.  Also, I did wonder what was new and novel here, as
>>sounded like our SDK which has been around for years.
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