Re: [irs-discuss] IRS comments

Lin Han <> Wed, 08 August 2012 23:17 UTC

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From: Lin Han <>
To: Gert Grammel <>, Thomas Nadeau <>, Lenny Giuliano <>, Alia Atlas <>
Thread-Topic: IRS comments
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Similar confusion by wisely avoidance -:)

If possible, Someone can draw a simple picture of IRS location in a router with existence of other components.

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


-----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 taxation.


----- 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.


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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