Good Day; As one of the authors of the this document "BGP Usage for SDWAN Overlay Networks draft-dunbar-bess-bgp-sdwan-usage-06 " (see the link https://datatracker.ietf.org/doc/draft-dunbar-bess-bgp-sdwan-usage/<https://nam11.safelinks..protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dunbar-bess-bgp-sdwan-usage%2F&data=02%7C01%7Clinda.dunbar%40futurewei.com%7Cda7df78d38a349fa7aea08d81897aa14%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637286386963995174&sdata=v9TV3YnBQXMooRavPrgymvGtMWFopNMGQ62Gm%2B7jHBI%3D&reserved=0>), I support the adoption of the document ONLY if the following comments are taken into the consideration:
1- Section 1, Page 3: There more characteristics of the SDWAN Service that needs to be captured. For example, the Application Routing based on specific performance criteria (e.g. packets delay, packet loos, jitter) is used to provide better application performance by choosing the right underlay that meets or exceeds the specified criteria; SD-WAN is doing this efficiently. This must be added for clarity and to avoid any misleading to the reader 2- Section 2, Page 5: What's the definition of the "SDWAN edge node"? Also, the SDWAN End-point has different definition at MEF 70.x; is the SDWAN End-point (in this document) the same as the one in MEF 70.x? We need to be clear about using the right terminology and its usage. 3- Section 3.1.1, Page 6: it would be good to include the reference to and the picture of the format of the proposed BGP Extended Community value (i.e. SD-WAN Target ID) and its value 4- Section 3.3, Page 11: For clarity add (after the end of the paragraph) the following sentence "If all the traffic is encrypted on all WAN ports (i.e. the C-PE WAN ports that are connected to the Internet and Private VPN network), then this will be similar to Scenario#1" 5- Section 4.1, Page 17 (Fig. 6): There is NO colors in the figure; there should be RED and BLUE colors in the figure to match the paragraph 6- Section 4.2, Page 18 (Fig. 7): There is NO Purple nor RED colors in the figure. There should be colors in the figure 7- Section 5.2, Page 22: This paragraph is not clear! the SD-WAN doesn't interact with the underlay PE nor it does exchange keys/policies with the PE. This is not the intent of the SD-WAN (as an overlay service). What's the purpose of this section? 8- Section 6, Page 26: The SDWAN Edge node that is directly connected to the Client Network (CN) learns the routes from the client (at this specific location) and then re-distribute this to the RR. This is needs to be clarified here Best Regards; Basil Najem
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