Re: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH

Peter Psenak <ppsenak@cisco.com> Fri, 29 May 2020 14:28 UTC

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Subject: Re: [spring] CRH is back to the SPRING Use-Case - Re: Size of CR in CRH
To: John Scudder <jgs@juniper.net>
Cc: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "spring@ietf.org" <spring@ietf.org>, 6man <6man@ietf.org>
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From: Peter Psenak <ppsenak@cisco.com>
Message-ID: <ea9a0467-c9a6-11bf-5454-d6bc44b8d2ad@cisco.com>
Date: Fri, 29 May 2020 16:28:13 +0200
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John,

On 29/05/2020 16:12, John Scudder wrote:
> [long list of individual email addresses trimmed from cc, mailing lists 
> left]
> 
> Peter,
> 
>> On May 29, 2020, at 5:11 AM, Peter Psenak 
>> <ppsenak=40cisco.com@dmarc.ietf.org 
>> <mailto:ppsenak=40cisco.com@dmarc.ietf.org>> wrote:
>>
>> if CRH-SIDs are of local significance how is the loose source routing
>> going to be supported?
> 
> By having the locally-significant CRH identifier (I’ve lost track of the 
> nom du jour :-) map in the CRH-FIB to a remote address (“segment 
> endpoint”), toward which the packet is forwarded along the least-cost 
> path. This is explicit in section 4:
> 
>     o  Forward the packet to the next-hop along the least-cost path to
>        the next segment endpoint.

how do nodes in the network learn about the local CRH identifier a node 
X allocated for a prefix residing on node Y?

thanks,
Peter


> 
> 
> Regards,
> 
> —John