AS 3356 (Level 3) -- Community 3356:666

Wed Aug 4 14:27:08 UTC 2021

Hello,
there's exactly *one* blackhole well-known community, which should be 
used for this purpose - 65535:666 (standardised in RFC 7999). There's no 
reason to use even "ASN:666" format these days...

- Daniel

On 8/4/21 3:28 PM, Sriram, Kotikalapudi (Fed) via NANOG wrote:
> There is an old NANOG thread from 2005 that said AS 3356 (Level 3) were applying 3356:666 to indicate Peer route:
> https://archive.nanog.org/mailinglist/mailarchives/old_archive/2005-12/msg00280.html
> Also, see: https://onestep.net/communities/as3356/
> 
> Now network operators commonly use ASN:666 for BGP Blackholing Community.
> (ASN = the operator's AS number)
> See, for example, https://www.he.net/adm/blackhole.html
> 
> Does anyone know if AS 3356 has changed how it uses 3356:666?
> I.e., is it known if they now use it for Blackholing Community?
> 
> Thank you.
> 
> Sriram
>      
> 