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charset="Windows-1252" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nist.gov X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SA1PR09MB8142.namprd09.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 606b9739-aa8b-4d34-3b3d-08d8f54aa06e X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Apr 2021 20:13:33.9848 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 2ab5d82f-d8fa-4797-a93e-054655c61dec X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA9PR09MB5984 Archived-At: Subject: Re: [Idr] Choice of Large vs. Extended Community for Route Leaks Solution X-BeenThere: idr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Inter-Domain Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Apr 2021 20:13:42 -0000 Brian,=0A= =0A= >We would like to continue proceeding with use of a LC range for implementa= tion, using a single (or small number) of Global Administrator values.=0A= =0A= I should have clarified. I am not opposed to staying on course with a WKLC = based solution. I only thought transitivity readily came with Transitive Ex= tended Community. Your proposal about one or a very small number of WKLC GA= values seems fine and it is consistent with Sue=92s advice. Please see my= next post (in this thread) which is about transitivity measurements of EC = and LC that should be helpful in this discussion.=0A= =0A= Sriram =0A= ________________________________________=0A= From: Brian Dickson =0A= Sent: Wednesday, March 31, 2021 6:10 PM=0A= To: Sriram, Kotikalapudi (Fed)=0A= Cc: Susan Hares; idr@ietf.org; draft-heitz-idr-wklc@ietf.org; grow@ietf.org= ; a.e.azimov@gmail.com=0A= Subject: Re: Choice of Large vs. Extended Community for Route Leaks Solutio= n=0A= =0A= On Wed, Mar 31, 2021 at 7:57 AM Sriram, Kotikalapudi (Fed) > wrote:=0A= Hi Sue,=0A= =0A= Thanks for the detailed thoughts you have shared on the IDR list about the = WKLC draft and route leaks solution draft (while also responding to Brian= =92s post).=0A= =0A= At one point in the past, the route leaks solution needed 8 bytes of user d= ata space to accommodate two ASNs but then there was a design change (more = than a year ago) and the current draft [1] requires only 4 bytes of user da= ta space (one ASN). So, it seems possible to use a Transitive Extended Comm= unity instead of WKLC.=0A= =0A= We (authors of the WKLC draft) can continue working on creating an IANA WKL= C registry for the future but I think the route leaks solution draft can sw= itch to using Transitive Extended Community. Especially, if that could help= expedite the route leaks draft and its deployment? I would like to seek ad= vice regarding that (I'm cc'ing GROW also here).=0A= =0A= [Brian] Sorry to argue in public, but I disagree very strongly on the secon= d part here.=0A= =0A= [Brian] We would like to continue proceeding with use of a LC range for imp= lementation, using a single (or small number) of Global Administrator value= s.=0A= =0A= [Brian] I think we should request that a small block of GAs surrounding the= initial assignments be tentatively marked something like Reserved for IANA= assignment.=0A= That is different from actually establishing a registry or assigning them s= pecifically for WKLCs, but would be compatible with subsequent WKLC work.= =0A= =0A= [Brian] The move to using LC values was precipitated by the observation tha= t the path for getting attributes deployed would be very long, and that ope= rators (actual network operators) are looking for a solution which can be d= eployed *now*.=0A= =0A= [Brian] Nothing has changed in this regard; the WKLC draft is IMHO still th= e right path, and only the size of the initial allocation is problematic.= =0A= =0A= [Brian] Having 1-4 GA values (from the 32-bit range of potential values) is= not burdensome IMNSHO, and is a lot less of a concern than the 1/64 (or 1/= 16) of the range of 32-bit ASNs originally requested/suggested.=0A= =0A= [Brian] If we can all agree that 1-4 GA values assigned for this is accepta= ble, I suggest a revised version of the draft and assessment of consensus o= n the revised draft for adoption and last call.=0A= =0A= [Brian] LC is the ONLY viable path, given the nebulous state of implementat= ion and use for EC/WC or attributes. LC is already deployed, and assigning = a few GAs by IDR is the only roadblock to the draft in GROW getting approve= d.=0A= =0A= Brian=0A= =0A=