Hi Zhibo,

On 09/12/2020 13:05, Huzhibo wrote:
Hi Peter:

     If Ti-LFA can protect IP flexalgo, the native IP and SR must share the 
same algorithm ID.

that is correct.

thanks,
Peter

thanks,
Zhibo

-----Original Message-----
From: Peter Psenak [mailto:[email protected]]
Sent: Wednesday, December 9, 2020 7:16 PM
To: Huzhibo <[email protected]>; Acee Lindem (acee) 
<[email protected]>; lsr <[email protected]>
Subject: Re: [Lsr] WG Adoption Call for "IGP Flexible Algorithms (Flex-Algorithm) In 
IP Networks" - draft-bonica-lsr-ip-flexalgo-01

Zhibo,

On 09/12/2020 11:50, Huzhibo wrote:
Hi authors,

Here are some comments about IP flexalgo as follows:

1.In Flex-Algo draft, there is description about using fast-rerouting
with Flex-Algo for SR-MPLS and SRv6 data plane. It is recommended that
similar text be added for IP Flex-Algo.

there is a similar text in section 8, but more work is required indeed.

One important note - TI-LFA requires some form of traffic steering. This can be achieved 
by enabling both IP and SR flex-algo and use SR FA only to protect IP FA, similar to 
protection of "unlabeled" traffic with SR MPLS. Or some alternative mechanism 
for enforcing the traffic on the LFA path is required.


2.Is Application-Specific Link Attribute (ASLA) MUST be used for IP
Flex-Algo path computation?

yes, the flex-algo application uses Flex-algo specific link attributes as 
defined in base flex-algo draft.

thanks,
Peter

Best regards,

Zhibo

*From:*Lsr [mailto:[email protected]] *On Behalf Of *Acee Lindem
(acee)
*Sent:* Wednesday, December 2, 2020 5:13 AM
*To:* lsr <[email protected]>
*Subject:* [Lsr] WG Adoption Call for "IGP Flexible Algorithms
(Flex-Algorithm) In IP Networks" - draft-bonica-lsr-ip-flexalgo-01

This IP Flex Algorithm draft generated quite a bit of discussion on
use cases and deployment prior to IETF 109 and there was generally
support for WG adoption. This begins a two week WG adoption call.
Please indicate your support or objection to WG adoption on this list
prior to
12:00 AM UTC on December 16^th , 2020. Also, review comments are
certainly welcome.

Thanks,

Acee





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