Earlier in this thread, there was discussion about some measurements that were shared (by Jared, Warren, myself). Jeff's suggestion: why don't we list all routes with AS_SET in addition to the stats. Now we have a detailed analysis (thanks once again to Lilia Hannachi my colleague at NIST): https://www.nist.gov/sites/default/files/documents/2019/10/23/detailed-as_set-analysis.txt
The analysis includes the following: 1. Summary stats 2. List of ASes (AGGREGATORs) Ranked according to # Routes with AS_SET (including the organization name of the AGGREGATOR) 3. List of routes with AS_SET that seem meaningless or malformed. 4. List of routes with AS_SET that seem meaningful. 3. List of all routes with AS_SET (listed per AGGREGATOR) The summary stats are copied here, but please see other details at the link provided. AS_SET ANALYSIS (OREGON 2019-10-03:00) The Routeviews OREGON collector peers with 43 ASes. Summary stats: Total # Updates : 30052331 # Updates with AS_SET : 14348 Percentage of Updates with AS_SET : 0.048% # Total # ASes (globally) : 66205 # ASes that create Updates with AS_SET : 144 % ASes that create Updates with AS_SET : 0.218% # Routes with AS_SET (after eliminating AS path redundancy): 477 Explanation: These are routes with unique {prefix, AS_SET, 1st AS after AS_SET, AGGREGATOR} combinations. Out of the 477 routes with AS_SETs: *** Identifying Routes with AS_SET that seem meaningless or malformed *** # Routes with only one AS in AS_SET : 383 # Routes with Reserved ASN in AS_SET : 131 # Routes with common AS in the AS_SEQUENCE and AS_SET : 139 # Routes with repeated ASes in the AS_SET : 0 # Routes that are /24 prefix (aggregate) announcements : 239 Total # Routes that seem meaningless or malformed : 456 Total # Routes that seem meaningful : 21 Distribution of # unique ASes in the AS_SET : 1:383, 2:68, 3:14, 4:5, 5:2, 6:3, 23:1, 31:1 # Routes with AS_SET where AGGREGATOR does not match the right most AS in AS_SEQUENCE : 47 # Routes with unique {prefix, AS_SET, AGGREGATOR} : 469 # Routes with unique {prefix, AS_SET} : 455 *** When there is an AGGREGATOR but no AS_SET *** # Unique prefixes (with or without AS_SET) : 826535 # Unique prefixes without AS_SET but with AGGREGATOR: 75698 % Unique prefixes without AS_SET but with AGGREGATOR: 9.158% Sriram _______________________________________________ GROW mailing list GROW@ietf.org https://www.ietf.org/mailman/listinfo/grow