Strange IPv6 results with new router.

I replaced my Billion 8800 with a Draytek 2672 and the IPv6 TBBQM looks horrible:

My Broadband Ping

Compared with the graph from the Billion:

My Broadband Ping

Both of these are pinging my email server rather than the router itself so are having to go through the firewall. I'm in discussion with Draytek and they've pointed out that they don't see any issues from their end. So I ran my own test using an online tool and I can see what they are saying:

https://www.subnetonline.com/pages/ipv6-network-tool...

'IPv6 Ping Output:
PING XXXXXX(XXXXXX (????:????:????:1:201:c0ff:fe11:f814)) 32 data bytes
40 bytes from XXXXXX (????:????:????:1:201:c0ff:fe11:f814): icmp_seq=1 ttl=120 time=30.9 ms
40 bytes from XXXXXX (????:????:????:1:201:c0ff:fe11:f814): icmp_seq=2 ttl=120 time=30.8 ms
40 bytes from XXXXXX (????:????:????:1:201:c0ff:fe11:f814): icmp_seq=3 ttl=120 time=30.5 ms
40 bytes from XXXXXX (????:????:????:1:201:c0ff:fe11:f814): icmp_seq=4 ttl=120 time=30.5 ms

--- XXXXXX ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 30.523/30.698/30.902/0.275 ms'

Which looks pretty reasonable all things considered (that site has an IPv4 test that says around 28ms). So why does TBBQM show such latency?

Edited by Andrue (Mon 27-Jan-20 15:23:33)

When I switched from VM to FTTC, I installed a brand-new Draytek 130 modem and saw a similar high average latency on the TBB graph. In my case the ping was being returned by a pfSense firewall beyond the Draytek modem and I saw variable latency on outbound pings, too - most reasonably low but a few very high, thus dragging the average up.. After trying various things to no avail, I eventually did a factory reset on the Draytek modem.

I have no idea why it worked, but it did. The TBB graph went back to normal and has been fine ever since. Wierd, I know, but perhaps worth trying?

It does appear to be something to do with the firewall. I've created a monitor that pings the router rather than my server and it looks fine.

https://www.thinkbroadband.com/broadband/monitoring/...

Nothing useful from Draytek support yet but they are working with me on it.

Have you heard anything back from draytek about this?, my graph is also fine if i ping the router, but pinging a machine gives the same results you have seen.

Post deleted by MrSaffron

One day you Spammers will at least attempt to type a sentence of your own rather than lifting them from other posts or other web sites.