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[Newbie question] Why ping to IPv6 is very fast compare to IPv4 on same server?
I just found that on my home network, ping to an IPv6 address is very slow fast, just about 2-3ms, but with the same location, same server, IPv4 will return slower result.
This is normal or there is something wrong with my ISP/network?
Here is a test result with BuyVM Las Vegas for example.
TraceRT IPv6:
TraceRT IPv4:
Comments
That's very fast, not slow. And yes, there's something weird at your ISP, looks like they make something inside their network answer pings to IPs that don't belong to them.
Try ping/tracert to
ipv6.google.com
and2001:470:20::2
, see if they got the same 2ms result.Check what https://test-ipv6.com/ shows for you, to see if IPv6 is actually working, and only the ping is weird, or it's not actually working at all.
My IPv6 address is working fine, I'm running dual stack IPv4 and IPv6 but just enable IPv6 few days ago.
Here are ping/tracert results to the given IPs:
Should be your ISP doing hijack. It is simply impossible to get 2ms from Vietnam to the US.
That doesn’t look right.
Yes, maybe but why only IPv6? They should do the same on IPv4 too...
Maybe they don't really configure IPv6 properly? A misconfigured IPv6 network will mostly be unnoticed thanks to happy eyeballs
It definitely looks like they’re doing some NAT64 within their network. Do you have a public IPv6 Address assigned to your house?
Would also suggest doing a trace from BuyVM to your home on v6.
As I suggested https://test-ipv6.com/ would be the first place to check.
No it does not. NAT64 allows IPv6-only clients to access IPv4-only sites by translating IPv4 addresses into IPv6 within a special designated prefix. None of that is at play here, the IPs that are pinged are not IPv4-only, and the special prefix doesn't appear anywhere in screenshots.