Point 2 point IPs between ASes

[Krunal Shah <KShah () primustel ca>]

Hello,

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.

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?



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Krunal Shah
Network Analyst, IP & Transport Network Engineering
O: 416-855-1805
kshah () primustel ca





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