Yeah, that's exactly what I have seen in the past. No esp packets coming back, they're dropped incoming when in bridge mode. I have had better luck with a replacement modem sometimes.
--Brendan On Mon, May 12, 2025, 17:41 Christopher Aloi via NANOG < [email protected]> wrote: > 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! > > On Mon, May 12, 2025 at 4:04 PM Eric C. Miller via NANOG < > [email protected]> wrote: > > > Sorry, no help from here per se, but I used to get into the same > situation > > with AT&T Uverse routers. It seemed to be an issue with the built-in > > stateful firewall of the DSL router. I was able to get around it by > having > > tunnels to multiple public IPs and rotating their usage with a script on > > our equipment. The problem seems to self-resolve after a reboot. Very > > frustrating when you pay for static IPs. > > > > Good luck! > > > > Eric > > ________________________________ > > From: Brendan Carlson via NANOG <[email protected]> > > Sent: Monday, May 12, 2025 3:20 PM > > To: North American Network Operators Group <[email protected]> > > Cc: Brendan Carlson <[email protected]> > > Subject: Re: Spectrum & GRE > > > > I've seen the same thing on those same models with them being in bridge > > mode specifically. They generally have issues with gre and l2tp tunnels. > > > > On Mon, May 12, 2025 at 12:13 PM Christopher Aloi via NANOG < > > [email protected]> wrote: > > > > > Hey All, > > > > > > Hoping someone can lend a hand here. I have ~ 1k customers running > GRE > > > tunnels back to me for VoIP. Over the last three weeks these tunnels > > have > > > started to break at a rate of 3-5 per day. We've narrowed it down to > > > customers using specific Spectrum routers (rac2v1s and rac2v2s). I am > > > still able to access the public IP but the tunnel drops and will not > come > > > back up. The fix has been to reconfigure as VPN or have the CPE router > > > replaced with a rac2v1k. I have been unable to get anyone to listen to > > me > > > at Spectrum as these accounts are owned by the customer and I can't > > prove a > > > systemic issue. I have a list of accounts that have been impacted. > Has > > > anyone else encountered this? Any contacts at Spectrum that might > listen > > > to me? I am fearing all of these tunnels will go down at some point. > > > > > > Thanks, > > > > > > Chris > > > _______________________________________________ > > > NANOG mailing list > > > > > > > > > https://lists.nanog.org/archives/list/[email protected]/message/Q344UTT7EK7AGJ3YY7OHJZZ7UBPZI63H/ > > > > > _______________________________________________ > > NANOG mailing list > > > > > https://lists.nanog.org/archives/list/[email protected]/message/727V6TQH3LZ5M6XPFMWZUR52JEJ4YLB5/ > > _______________________________________________ > > NANOG mailing list > > > > > https://lists.nanog.org/archives/list/[email protected]/message/Z7Z4YWCI4MKTOOXOLIYSJTVWNVGMKAE6/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/FHFYKLHGVYR7ZLTQ6GG7G3VAH4WQJMF5/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/NZGY4XEV43YPYNPHQYIZ2SIOEJWIXWAQ/
