High Ping with ipv6 Enabled locally for CF enabled site, why

DNS & Network
#1

hi there,

I have a wordpress site on Cloudflare, usually working well - i just noticed that i get a very high ping when i have ipv6 enabled on my router here locally - i’m on fiber optic so fast 1gbps connection.

With ipv6 enabled i get 150ms ping to my server
With ipv6 disabled i get 4-6 ms ping to my server (great)

I did a check with nslookup -class=chaos -type=txt id.server 1.1.1.1 and that returns the correct nearest server to me.

When i do trace route to my site with ipv6 on, at some point there’s a hop that jumps 150 ms. By doing a trace on that very hop, you end up on Mauritius??

2c0f:f748:cafe:1::9 try with Traceroute Utility Tool For IPv6 | IPAddressGuide

if i do ping cloudflare.com (shows ipv6 correctly), that one has just 5ms which is correct.

why’s that and can i fix this?

thanks,
Gabrio

#2

i just retested now and it auto corrected itself. mystery. it went on another ipv6. and is 5ms now

#3

funny, i tested it again this morning and it’s back with the 150ms ping on ipv6. what’s going on?

morning slow and afternoon fast?

#4

Meaning, it could be your local Internet Service Provider, and not the server nor Cloudflare?

Could it be related to below maybe?:

Me too at home (not 1Gbps but), but I also notice “high pings” over Fibre from time to time when playing games online.

#5

this is so bizarre though. if i disable it and go with IP 4 then it’s all fine at all times.

they should have same peering at all times, but doesn’t seem to be the case.

thanks