Re: Spectrum & GRE

[Brendan Carlson via NANOG <nanog () lists nanog org>]

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 <
nanog () lists nanog org> 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
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