Point 2 point IPs between ASes

Niels Bakker niels=nanog at bakker.net
Tue Jun 27 20:34:30 CST 2017

* KShah at primustel.ca (Krunal Shah) [Tue 27 Jun 2017, 22:28 CEST]:
>What subnet mask you are people using for point to point IPs between 
>two ASes? Specially with IPv6, We have a transit provider who wants 
>us to use /64 which does not make sense for this purpose. isn’t it 
>recommended to use /127 as per RFC 6164 like /30 and /31 are common 
>for IPv4.

Whatever you want.

>I was thinking, if someone is using RFC7404 for point to point IP 
>between two ASes and establish BGP over link local addresses. This 
>way you have your own IP space on your router and transit provider 
>does not have to allocate IP space for point to point interface 
>between two ASes. In traceroutes you would see only loopback IP 
>address with GUA assigned from your allocated routable address 
>space. Remotely DDoS to this link isn’t possible this way. Thoughts?

If you can protect the loopback IP from DDoS you can equally protect 
linknet IPs.

	-- Niels.

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