mysqlrouter is Unable to connect to the metadata server

[IGG t]

I have set up a set of three MySQL 8.0.17 databases using group replication. They are all on my Windows 10 PC, using ports 3306,3307,3308.

They were set up using the new 'clone' plugin.

I am now trying to set up mysqlrouter. I have installed it in c:/mysqlrouter/.

But when I run:

mysqlrouter --bootstrap root@localhost:3306 -d c:\mysqlrouter

I simply get:

Error: Unable to connect to the metadata server: Error connecting to MySQL server at 127.0.0.1:3306:
Lost connection to MySQL server at 'waiting for initial communication packet', system error: 10060 (2013)


This is the same on all three ports, and using each of the different users (localhost, 127.0.0.1 etc)

I have confirmed that the MySQL user exists on all of them, (I have root @ localhost / 127.0.0.1 / ::1 / % all set up) and I can login to MySQL using each of them.

Is there something I need to configure? I can't see anything obvious in the documentation?