IPV4 Sub netsTutorial

Start > CMD > ipconfig

IPV6 Addresses was introduced to provide large address space

IPv6 Testing Tools

Check your IPv6 address formatting is correct

• Check if the IPv6 address you are using is valid and properly formatted IPv6

Check your IPv6 connectivity from this website (Sydney)

• Ping an address or host using both IPv6 and IPv4
• Trace your network route to an IPv6 address or host

Check your IPv6 connectivity from ipv6-test.com (USA)

• Check your IPv6 and IPv4 connectivity
• Compare the ping latency of your IPv4 and IPv6 connectivity from around the world
• Compare the broadband speed of your IPv4 and IPv6 connectivity from around the world

Check Internet Service Provider IPv6 readiness

For full IPv6 connectivity, service providers need to set up IPv6-addressed nameservers, AAAA ('quad-A') address records, AAAA mail exchange records and allow website access over IPv6.

• Check IPv6 nameservers, AAAA & MX records and website (ready.chair6.net)
• IPv6 DNS, mail exchange and website connectivity (ip6-nl)
• AAAA records and website IPv6 connectivity (ipv6-test.com)

Check your IPv6 Path Maximum Transmission Unit

If a host sends IPv6 packets that are too big for part of its route, it should get a Packet Too Big message so it can re-transmit the data in smaller packets. If that message doesn't get back (e.g. firewalls, mis-configured routers) it can affect IPv6 connectivity. 

• Quick test for Path MTU issues with the IPv6 Chicken
• Check for Path MTU discovery problems (wand.net.nz)