I'm guessing EE have got IPv6 to IPv4 working properly then, which is good 👍 ... View more

Have you tried disabling the default traffic shaping rules and entering a custom expression for the hostnames backblaze.com and backblazeb2.com (without the *.wildcard)? ... View more

You don't. You create a separate DNS entry internally for this traffic to follow or you use an internal hostname in the application / device. The internal entry resolves to an internal IP address. Or just put the internal IP in the device so it connects direct?   People make hairpin NAT's in business settings for job security reasons or to make management happy, not for sensible engineering decisions. Keep your traffic flows sensible. ... View more

Sometimes they get stuck in a firmware upgraded loop. It is not very obvious when this happens (except they use a lot of bandwidth 24x7).  Perhaps whatever loop it got itself into it has now managed to sort out. ... View more

Done. And I was afraid of no IPv6 support. ... View more

3m is the longest stacking cable you can get for all the stackable switches, with the exception of the MS420 and MS425.     The MS420 and MS425 support "flexible stacking" which allows you to configure the 10Gbe SFP+ ports to be stack ports. https://documentation.meraki.com/MS/Stacking/Switch_Stacks#Configuring_a_Flexible_Switch_Stack     ... View more