I recently saw this on Facebook: BREAKING: Some Xfinity/Comcast users are getting a message in the Chicago and Springfield, Illinois markets that they are shutting down Internet service until 11:15 PM this evening due to overheating equipment... Update: some areas are doing rolling outages. Are rolling outages due to heat something common for ISPs to do? I've never heard of it for any of the hundreds of ISPs I've talked to. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP
On 6/15/22 14:03, Mike Hammett wrote:
I recently saw this on Facebook:
BREAKING: Some Xfinity/Comcast users are getting a message in the Chicago and Springfield, Illinois markets that they are shutting down Internet service until 11:15 PM this evening due to overheating equipment... Update: some areas are doing rolling outages.
Are you sure this isn't a spoof?
Are rolling outages due to heat something common for ISPs to do? I've never heard of it for any of the hundreds of ISPs I've talked to.
Not in my experience. Network gear generates heat. Datacenters are or should be designed to remove this heat, with appropriate redundancy. In outside HFC cable plant, there are distributed cable trunk amplifiers and fiber equipment. These are designed to survive a wide range of temperatures. A failure in the outside plant distribution would also take out their cable television offerings. This outside plant equipment is typically locally powered from the local utility, with power injected into the coaxial trunk cable. In many cases there is no battery backup or very little for these trunk amplifiers and fiber media converters. If the local power utility is having rolling power blackouts, it's going to affect cable modem customers in the area of the rolling power blackouts, many of which won't notice because their power is also out. Direct fiber customers (GPON, etc.) shouldn't have an issue. -- Jay Hennigan - jay@west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV
I know the person that posted it and they wouldn't knowingly post something false. That's not to say that that some trickster isn't clever. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Jay Hennigan" <jay@west.net> To: nanog@nanog.org Sent: Wednesday, June 15, 2022 4:20:40 PM Subject: Re: Comcast Rolling Outages On 6/15/22 14:03, Mike Hammett wrote:
I recently saw this on Facebook:
BREAKING: Some Xfinity/Comcast users are getting a message in the Chicago and Springfield, Illinois markets that they are shutting down Internet service until 11:15 PM this evening due to overheating equipment... Update: some areas are doing rolling outages.
Are you sure this isn't a spoof?
Are rolling outages due to heat something common for ISPs to do? I've never heard of it for any of the hundreds of ISPs I've talked to.
Not in my experience. Network gear generates heat. Datacenters are or should be designed to remove this heat, with appropriate redundancy. In outside HFC cable plant, there are distributed cable trunk amplifiers and fiber equipment. These are designed to survive a wide range of temperatures. A failure in the outside plant distribution would also take out their cable television offerings. This outside plant equipment is typically locally powered from the local utility, with power injected into the coaxial trunk cable. In many cases there is no battery backup or very little for these trunk amplifiers and fiber media converters. If the local power utility is having rolling power blackouts, it's going to affect cable modem customers in the area of the rolling power blackouts, many of which won't notice because their power is also out. Direct fiber customers (GPON, etc.) shouldn't have an issue. -- Jay Hennigan - jay@west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV
Mike - There are a lot of rolling power outages. Thus the reason for the overheating most likely as gear, while on battery backup, generally lacks the cooling capacity. Horizon, Comcast, Wow/Breezeway apparently are doing the same across the Columbus Marketing in Ohio as well. *Glenn S. Kelley, *Connectivity.Engineer Text and Voice Direct: 740-206-9624 IMPORTANT: The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email by mistake, please notify Glenn Kelley, the sender, immediately and do not disclose the contents to anyone or make copies thereof. On Wed, Jun 15, 2022 at 5:03 PM Mike Hammett <nanog@ics-il.net> wrote:
I recently saw this on Facebook:
BREAKING: Some Xfinity/Comcast users are getting a message in the Chicago and Springfield, Illinois markets that they are shutting down Internet service until 11:15 PM this evening due to overheating equipment... Update: some areas are doing rolling outages.
Are rolling outages due to heat something common for ISPs to do? I've never heard of it for any of the hundreds of ISPs I've talked to.
----- Mike Hammett Intelligent Computing Solutions <http://www.ics-il.com/> <https://www.facebook.com/ICSIL> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> <https://www.linkedin.com/company/intelligent-computing-solutions> <https://twitter.com/ICSIL> Midwest Internet Exchange <http://www.midwest-ix.com/> <https://www.facebook.com/mdwestix> <https://www.linkedin.com/company/midwest-internet-exchange> <https://twitter.com/mdwestix> The Brothers WISP <http://www.thebrotherswisp.com/> <https://www.facebook.com/thebrotherswisp> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
Rolling power outages in the Chicago area are very uncommon. Usually it's due to a failure of something and not a planned load shed, but even then, it's uncommon any time there isn't physical damage from a storm. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Glenn Kelley" <glenn@connectivity.engineer> To: "Mike Hammett" <nanog@ics-il.net> Cc: "North American Network Operators' Group" <nanog@nanog.org> Sent: Thursday, June 16, 2022 9:46:00 AM Subject: Re: Comcast Rolling Outages Mike - There are a lot of rolling power outages. Thus the reason for the overheating most likely as gear, while on battery backup, generally lacks the cooling capacity. Horizon, Comcast, Wow/Breezeway apparently are doing the same across the Columbus Marketing in Ohio as well. Glenn S. Kelley, Connectivity.Engineer Text and Voice Direct: 740-206-9624 IMPORTANT: The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email by mistake, please notify Glenn Kelley, the sender, immediately and do not disclose the contents to anyone or make copies thereof. On Wed, Jun 15, 2022 at 5:03 PM Mike Hammett < nanog@ics-il.net > wrote: I recently saw this on Facebook: BREAKING: Some Xfinity/Comcast users are getting a message in the Chicago and Springfield, Illinois markets that they are shutting down Internet service until 11:15 PM this evening due to overheating equipment... Update: some areas are doing rolling outages. Are rolling outages due to heat something common for ISPs to do? I've never heard of it for any of the hundreds of ISPs I've talked to. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP
participants (3)
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Glenn Kelley -
Jay Hennigan -
Mike Hammett