RE: Spectrum (Charter) Fragmented UDP

2019-10-03 Thread Phil Lavin
> At some point over night on 30th September (i.e. the night going into 1st > October), we saw a number of Spectrum (Charter) customers stop handling > fragmented UDP packets To bring this thread to a close, Charter kindly investigated and fixed the issue. It was caused by a change to their net

Re: Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Rampley, Jim F
Hi Phil, Contact me off list with the locations impacted and I will look into it. Jim On 10/2/19, 7:00 AM, "NANOG on behalf of Phil Lavin" wrote: > While we can say this should just work, the reality is, it's not very reliably true and I would not build product or business on the assump

Re: Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Dovid Bender
Wait till STIR/SHAKEN is enabled. Were going to see real quickly who isn't handling fragmentation correctly... On Wed, Oct 2, 2019 at 8:34 AM Saku Ytti wrote: > Hey Phil, > > > At some point over night on 30th September (i.e. the night going into > 1st October), we saw a number of Spectrum

Re: Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Tarko Tikan
hey, I don't know anything specific to this case, but you'd serve your best interest to send small enough packets that do not need fragmentation, particularly in the backbone. In this case the SIP invite is already sent fragmented from the source and no fragmentation is required in transit. S

RE: Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Phil Lavin
> While we can say this should just work, the reality is, it's not very > reliably true and I would not build product or business on the assumption > that it works well. Yup. Understood. We can't get away from sending multi-packet messages. We try our best to keep SIP messages as small as possi

Re: Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Saku Ytti
Hey Phil, > At some point over night on 30th September (i.e. the night going into 1st > October), we saw a number of Spectrum (Charter) customers stop handling > fragmented UDP packets. This has manifested itself in such that the phones of > affected customers are no longer receiving UDP SIP IN

Spectrum (Charter) Fragmented UDP

2019-10-02 Thread Phil Lavin
At some point over night on 30th September (i.e. the night going into 1st October), we saw a number of Spectrum (Charter) customers stop handling fragmented UDP packets. This has manifested itself in such that the phones of affected customers are no longer receiving UDP SIP INVITE packets which