I wonder if this has anything to do with the handling of GRE for tunneling hotspot Wi-Fi traffic from their routers. It wouldn't be the first time an ISP's handling of their own traffic caused problems with a user's traffic, even though it shouldn't. On 5/13/2025 7:00 PM, nanog-request@lists.nanog.org wrote:
Message: 1 Date: Mon, 12 May 2025 16:14:15 -0400 From: Christopher Aloi<ctaloi@gmail.com> Subject: Re: Spectrum & GRE To: North American Network Operators Group<nanog@lists.nanog.org> Message-ID: <CAMCCzApYOeUpEd7P8mjDbVKm6Nzx=0Lva4iuVhD1S+y-87Q2xw@mail.gmail.com> Content-Type: text/plain; charset="UTF-8"
Thanks Eric and Brendan. Yes, this is specifically related to when we put the rac2v1s in bridge mode and I bind one of the static public IP addresses to my router. If I captured packets on my router I can see GRE packets leaving my router destined for my data center, but I never see any of the return packets I send. They are being lost/dropped on the way back in. I am up to 30 of these now. What I can't grock is why they come in at a rate of ~5 every morning. If anyone has any contacts at Spectrum that might listen, or a workaround, please let me know!