My trace route shows that once my traffic enters Zayo network it becomes terribly unstable and most rechecks are even showing different routes on their side. Apparently EU-US connection is going now this way and is therefore affected.

> On 30. Sep 2022, at 17:07, Jeremy Stanley <fungi@yuggoth.org> wrote:
>
> On 2022-09-30 15:53:22 +0100 (+0100), Neil Jerram wrote:
> [...]
>> For me it would be coming from wherever Semaphore's machines are.  But I
>> also tried from my own laptop, based in Cambridge UK, and that failed as in
>> my report that started this thread.  My ISP is Shell Energy.
>>
>> I just tried again from my laptop, and now the clone has succeeded.
>
> Our server farm for Git is generously hosted within VEXXHOST's
> San Jose USA public cloud region, so it's possible something is
> causing disconnects reaching it from some parts of the 'net and not
> others. I'm connecting to it from Charter Cable in the USA, who
> peers with Zayo (formerly AboveNet) in Atlanta, and then VEXXHOST
> peers with them in San Jose. Not exactly next door, but I'm only
> traversing one backbone provider to get there (and with access to
> the server I've confirmed the return route is mostly symmetrical
> though comes back through a Zayo/Charter peering in Washington DC).
>
> To rule out IP protocol differences, I've done repeated git clone
> tests over both IPv4 and IPv6 too, with no observable issues.
> --
> Jeremy Stanley