Re: [GROW] [Sidrops] Deprecation of AS_SET and AS_CONFED_SET -- feedback requested

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
_______________________________________________
Idr mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/idr