On 29/04/2017, at 16:38, Andre Sencioles <asenci@gmail.com> wrote:

On 25 April 2017 at 11:43, Alastair Johnson <aj@sneep.net> wrote:

For your more typical router-to-router links, then by all means, use a /64, /127 or anything else you feel like. SR OS supports this too.

Not sure if this is still valid, but I had issues using /127's on ethernet links a couple of years ago.

My end (RouterOS) assumed the first available address to be the Subnet-Router anycast address, and listened on both addresses.

Had to negotiate swapping the addresses with the other end to make it work.

Mikrotik's solution here is to create the address on the link as a /32 or /128 and set the "network" to the other IP address you are using.

They use this method internally for anything "point to point". I try avoid using this personally for /31 links myself because it behaves unusually and is too easy to get into bad habits that will cause problems in the future or with others.

Andre

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