You didn’t specify anything that would be useful to narrow down the issue (i.e. location, asn, error codes, etc) - We had a somewhat similar issue at DET-IX with routes to us-east-1 and us-east-2 seeing a lot of packet loss, but AWS eventually just de-peered the exchange entirely since it was an issue with their equipment.

On Jul 20, 2023, at 5:17 PM, Margi Varia via NANOG <nanog@nanog.org> wrote:

Hi Nanog,

We are seeing this weird issue in one part of the network. Customers in one public subnet are not able to reach certain websites suddenly which are hosted in AWS like slack.com, bill.com..

We changed the subnet to new one and issue resolved, after 48 hours, we have the same issue again. We are not AWS customer, so can't call them, but what are our options? 

Thanks,
Margi