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Re: [Lsr] Question about draft-ppsenak-lsr-igp-ureach-prefix-announce

Peter Psenak <ppsenak@cisco.com> Wed, 03 August 2022 15:20 UTC

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To: Huzhibo <huzhibo@huawei.com>
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From: Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [Lsr] Question about draft-ppsenak-lsr-igp-ureach-prefix-announce
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Hi Zhibo,

On 29/07/2022 20:49, Huzhibo wrote:
> Hi Peter:
> 
> Supplement to yesterday's online questions, If a node that does not 
> support IP Flexalgo, which has a default route, should the node process 
> the IP Flexalgo prefix as a UPA?

- I assume you are talking about the algo 0 default route. Because IP 
Flex-algo default route does not make much sense really.

- If the node does not support IP flex-algo, than it would not use any 
IP algo prefix as BGP service endpoint or for any other purpose.

- If such node receives the IP algo prefix and even if it treats it as 
UPA, given that such IP algo prefix was never reachable before on this 
node, the UPA would result in no action.

thanks,
Peter
> 
> Thanks
> 
> Zhibo
>

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