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

["Sriram, Kotikalapudi (Fed)" <[e-mail]>]

Jared,

>(Obviously my search in e-mail today went afoul, I see it’s adopted.. 

Yes, the draft was adopted. You can see the discussion here:
https://mailarchive.ietf.org/arch/browse/idr/?gbt=1&q=WG%20adoption%20for%20draft-kumari-deprecate-as-set-confed-set  

One key point of the discussion was about the specification for action at 
a receiver when an update with AS_SET or AS_CONFED_SET is received.
The consensus seemed to be: treat as Withdraw.
We'll soon update the draft to add that.

You had observed in that thread:
>We should also (in parallel) reach out to some of the networks 
>still using as_sets that are visible in the global BGP table.   

How do we do this? On NANOG, RIPE, etc. lists? Please advise.

>I did notice after this a few more BGP announcements with AS_SET 
>occurring on a very regular basis.  I suspect someone is doing some 
>research on it, perhaps someone reading this e-mail :-)

The percentage of updates with AS_SET is observed to be about 0.05%.
This has been in that ballpark for a long time.
Are you computing the percentages in what you observe? 
Is it much different from 0.05%?

Some recent measurements we have at NIST about this are as follow:
(thanks to Lilia Hannachi - my colleague)

******* OREGON3 Collector (20190827.00) **************
August 27, 2019

IPV4 : {normal=16540660, AGGREGATOR=1718902, ATOMIC_AGGREGATE=1086313, AS_CONFED_SET=0, AS_SET=8971, AS_CONFED_SEQUENCE=0}
IPV4 Total 18323517
IPV4 Percentage
normal : 90.27%
AGGREGATOR : 9.38%
ATOMIC_AGGREGATE : 5.93%
AS_CONFED_SET : 0.0%
AS_SET : 0.05%
AS_CONFED_SEQUENCE : 0.0%
Number of ASs in the AS_SET Paths (IPV4) {1=7837, 2=876, 3=144, 4=50, 5=53, 6=2, 7=9}
Position of AS_SET (IPV4) {Beginning=8971, Middle=0, Left_Most=0}
Number of AS_SET with Reserver ASes (IPV4) 248
Number of no-export and no-advertise (IPV4) {no-export=0, no-advertise=751278}
no-export : 0.0%
no-advertise : 4.95%
---------------------------------------------------------------
IPV6 : {normal=67633, AGGREGATOR=8297, ATOMIC_AGGREGATE=3548, AS_CONFED_SET=0, AS_SET=36, AS_CONFED_SEQUENCE=0}
IPV6 Total 76128
IPV6 Percentage
normal : 88.84%
AGGREGATOR : 10.9%
ATOMIC_AGGREGATE : 4.66%
AS_CONFED_SET : 0.0%
AS_SET : 0.05%
AS_CONFED_SEQUENCE : 0.0%
Number of ASs in the AS_SET Paths (IPV6) {1=24, 2=8, 3=1, 4=2, 8=1}
Position of AS_SET (IPV6) {Beginning=36, Middle=0, Left_Most=0}
Number of AS_SET with Reserver ASes (IPV6) 0
Number of no-export and no-advertise (IPV6) {no-export=0, no-advertise=3765}
no-export : 0.0%
no-advertise : 4.95%
---------------------------------------------------------------------------

******* LINX Collector (20190827.00) **************
August 27, 2019

IPV4 : {normal=21697743, AGGREGATOR=2255396, ATOMIC_AGGREGATE=1425305, AS_CONFED_SET=0, AS_SET=11353, AS_CONFED_SEQUENCE=0}
IPV4 Total 24036253
IPV4 Percentage
normal : 90.27%
AGGREGATOR : 9.38%
ATOMIC_AGGREGATE : 5.93%
AS_CONFED_SET : 0.0%
AS_SET : 0.05%
AS_CONFED_SEQUENCE : 0.0%
Number of ASs in the AS_SET Paths (IPV4) {1=9890, 2=1130, 3=188, 4=64, 5=65, 6=2, 7=14}
Position of AS_SET (IPV4) {Beginning=11353, Middle=0, Left_Most=0}
Number of AS_SET with Reserver ASes (IPV4) 348
Number of no-export and no-advertise (IPV4) {no-export=6, no-advertise=0}
no-export : 0.0%
no-advertise : 0.0%
*********************************
IPV6 : {normal=69177, AGGREGATOR=8335, ATOMIC_AGGREGATE=3543, AS_CONFED_SET=0, AS_SET=37, AS_CONFED_SEQUENCE=0}
IPV6 Total 77712
IPV6 Percentage
normal : 89.02%
AGGREGATOR : 10.73%
ATOMIC_AGGREGATE : 4.56%
AS_CONFED_SET : 0.0%
AS_SET : 0.05%
AS_CONFED_SEQUENCE : 0.0%
Number of ASs in the AS_SET Paths (IPV6) {1=24, 2=9, 3=1, 4=2, 8=1}
Position of AS_SET (IPV6) {Beginning=37, Middle=0, Left_Most=0}
Number of AS_SET with Reserver ASes (IPV6) 0
Number of no-export and no-advertise (IPV6) {no-export=0, no-advertise=0}
no-export : 0.0%
no-advertise : 0.0%

Sriram