Acee, The draft-dunbar-lsr-5g-edge-compute-ospf-ext has two parts:
* Aggregated Cost Advertisement * IP Layer App-Metrics Advertisements by OSPF "Aggregated Cost" is only applicable to scenario where all the A-ER can have a consistent algorithm to compute the Aggregated cost. When it is not possible for all the egress edge routers to have a consistent algorithm to compute the aggregated cost or some routers need all the detailed IP Layer metrics for the App Servers for other purposes, the raw IP layer metrics collected A-ER will be distributed. Only the nodes that are capable of utilizing the metrics will process the sub-TLV. Since only a subset of routers within an IGP domain need to know those detailed metrics, the draft used your suggested OSPFv2 Extended Prefix Opaque LSA for IPv4 and OSPFv3 Extended LSA with Intra-Area-Prefix TLV to carry the detailed sub-TLVs. For routers that don't care about those metrics, they can ignore them very easily. It worth noting that not all hosts (prefix) attached to an A-ER are ANYCAST servers that need network optimization. An A-ER only needs to advertise the App-Metrics for the ANYCAST addresses that match with the configured ACLs. Any other concerns? Thank you Linda Dunbar From: Acee Lindem (acee) <[email protected]> Sent: Monday, July 12, 2021 4:04 PM To: Linda Dunbar <[email protected]>; Yingzhen Qu <[email protected]>; [email protected] Cc: [email protected] Subject: Re: [Lsr] LSR Presentation Slot Requests - IETF111 Speaking as WG member: Hi Linda, Even if you've added some IS-IS encodings, the draft still suffers from the fundamental problem of the previous draft. If you can't rely on the A-ERs to consistently calculate an aggregated metric, how can you rely on all the routers in the IGP routing domain to use complex set of metrics to reach the least-loaded app server? Do we really want to talk about this again? Thanks, Acee From: Linda Dunbar <[email protected]<mailto:[email protected]>> Date: Monday, July 12, 2021 at 4:27 PM To: Yingzhen Qu <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: RE: [Lsr] LSR Presentation Slot Requests - IETF111 Resent-From: <[email protected]<mailto:[email protected]>> Resent-To: Acee Lindem <[email protected]<mailto:[email protected]>>, Christian Hopps <[email protected]<mailto:[email protected]>>, Yingzhen Qu <[email protected]<mailto:[email protected]>> Resent-Date: Monday, July 12, 2021 at 4:27 PM Yingzhen and LSR Chairs, We need a 10 minutes slot at IETF111 to present https://datatracker.ietf.org/doc/draft-dunbar-lsr-5g-edge-compute/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dunbar-lsr-5g-edge-compute%2F&data=04%7C01%7Clinda.dunbar%40futurewei.com%7C66caea5e0b7243b0d4ce08d94578939b%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637617206455265464%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=VB%2BWjb2Zd%2Fe0iSE8K%2BMCpL%2FbiZYqhS5T2602e2z2cPc%3D&reserved=0> Speaker: Linda Dunbar. This draft adds the IS-IS extension to the draft-dunbar-lsr-5g-edge-compute-ospf-ext-04. Thank you Linda Dunbar From: Lsr <[email protected]<mailto:[email protected]>> On Behalf Of Yingzhen Qu Sent: Wednesday, June 30, 2021 4:00 PM To: [email protected]<mailto:[email protected]> Cc: [email protected]<mailto:[email protected]> Subject: [Lsr] LSR Presentation Slot Requests - IETF111 Hi all, The draft agenda for IETF111 has been posted: https://datatracker.ietf.org/meeting/111/agenda<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fmeeting%2F111%2Fagenda&data=04%7C01%7Clinda.dunbar%40futurewei.com%7C66caea5e0b7243b0d4ce08d94578939b%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637617206455275420%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=uhIFfvuGreFkey%2BMO6fmTK52Y%2FmAc7C7Qlrj8FhzvIw%3D&reserved=0>. LSR will have one meeting session: Friday, July 30, 2021 16:00-18:00 Session III PDT Please send slot requests to [email protected]<mailto:[email protected]>. Please include name of the presenter, pointer to the draft and time estimation including Q&A. Thanks, Yingzhen
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