Hi John, Here's what we've noticed across our customer base. * We first started getting reports of the problem yesterday 9/10 at ~9 AM ET * The problem seems to be focused on Connecticut in/around Hartford * The problem seems to be flow related. A flow (RTP which is a UDP RTP towards a static destination ip & port) that is sent from Comcast Business customer to our cloud has 100% packet loss. Then, a new call is generated creating a new flow and that flow will have 0% packet loss. The issue seems to be affecting ~50% of "flows". We've got P1 ticket INC008691463 opened w/ Comcast Business on a Comcast circuit we have. Happy to work more closely together on this if helpful. Sincerely, Blake McKeeby On Thu, Sep 11, 2025 at 4:56 PM, John Neiberger < jneiberger@pm.me > wrote:
I'm on a call troubleshooting this issue right now. If anyone has any additional information, please share here.
Many thanks, John
On Thursday, September 11th, 2025 at 2:04 PM, Blake Mckeeby via Outages < outages@ outages. org ( outages@outages.org ) > wrote:
Anyone else seeing issues with traffic routing from Comcast Business customers in Connecticut?
We see that ~50% of RTP flows experience 100% packet loss while the other 50% of flows result in no packet loss. The issue is certainly in the direction of traffic sent from Comcast Business Customers towards the internet but may also be in the reverse direction as well.
The MTRs below show the path *towards *the affected Comcast Business customers. Note all are hung off of Newark -> Hartford.
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
0.0% 22 0.5 0.5 0.3 1.6 0.3
5. core1. ae2-bbnet2. nyc002. us. unitasglobal. net ( http://core1.ae2-bbnet2.nyc002.us.unitasglobal.net/ ) 0.0% 22 0.9 1.4 0.8 10.2 2.0
6. 145-115-232-198. static. unitasglobal. net ( http://145-115-232-198.static.unitasglobal.net/ ) 47.6% 22 1.5 1.6 1.2 1.9 0.2
7. e0-40. cr1. nyc1. us. unitasglobal. net ( http://e0-40.cr1.nyc1.us.unitasglobal.net/ ) 19.0% 22 1.3 1.6 1.3 1.8 0.2
8. e0-16. cr1. nyc2. us. unitasglobal. net ( http://e0-16.cr1.nyc2.us.unitasglobal.net/ ) 0.0% 22 1.9 2.5 1.6 11.2 2.0
9. 0. ca-1-1-c22-1. ter1. ewr1. us. zip. zayo. com ( http://0.ca-1-1-c22-1.ter1.ewr1.us.zip.zayo.com/ ) 18.2% 22 1.2 1.2 1.1 1.7 0.1
*10. be-202-pe11. newark. nj. ibone. comcast. net ( http://be-202-pe11.newark.nj.ibone.comcast.net/ ) http:/ / be-202-pe11. newark. nj. ibone. comcast. net ( http://be-202-pe11.newark.nj.ibone.comcast.net/ )
0.0% 22 2.6 2.4 2.1 2.7 0.2*
*11. be-2411-cs04. newark. nj. ibone. comcast. net ( http://be-2411-cs04.newark.nj.ibone.comcast.net/ ) http:/ / be-2411-cs04. newark. nj. ibone. comcast. net ( http://be-2411-cs04.newark.nj.ibone.comcast.net/ )
0.0% 22 2.6 2.5 2.2 2.8 0.1*
12. 96.110.42.206 0.0% 21 8.1 9.3 8.1 13.8 1.2
13. 96.110.117.109 0.0% 21 11.8 11.7 11.6 11.9 0.1
*14. po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ )
0.0% 21 12.8 12.7 12.7 12.9 0.1*
*15. po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ )
0.0% 21 12.2 12.3 12.1 13.9 0.4*
16. 68.86.237.6 0.0% 21 13.7 13.7 13.6 13.9 0.1
17. 50.212.5.38 0.0% 21 26.1 28.7 26.1 43.1 3.7
* Packets Pings*
Host Loss% Snt Last Avg Best Wrst StDev
5. core1. ae1-bbnet1. nyc002. us. unitasglobal. net ( http://core1.ae1-bbnet1.nyc002.us.unitasglobal.net/ ) 0.0% 6 0.7 0.9 0.7 1.1 0.1
6. ae50. cr1. nyc1. us. unitasglobal. net ( http://ae50.cr1.nyc1.us.unitasglobal.net/ ) 20.0% 6 1.8 1.6 1.6 1.8 0.1
7. e0-40. cr1. nyc1. us. unitasglobal. net ( http://e0-40.cr1.nyc1.us.unitasglobal.net/ ) 0.0% 6 1.7 1.6 1.4 1.7 0.1
8. nyk-b11-link. ip. twelve99. net ( http://nyk-b11-link.ip.twelve99.net/ )
25.0% 5 2.0 2.0 2.0 2.1 0.1
9. (waiting for reply)
10. (waiting for reply)
11. comcast-ic-378794. ip. twelve99-cust. net ( http://comcast-ic-378794.ip.twelve99-cust.net/ ) 60.0% 5 2.4 2.2 2.1 2.4 0.2
*12. be-2412-cs04. newark. nj. ibone. comcast. net ( http://be-2412-cs04.newark.nj.ibone.comcast.net/ ) http:/ / be-2412-cs04. newark. nj. ibone. comcast. net ( http://be-2412-cs04.newark.nj.ibone.comcast.net/ )
0.0% 5 2.9 2.8 2.7 2.9 0.1*
13. 96.110.42.206 0.0% 5 11.1 10.2 9.5 11.1 0.7
14. 96.110.117.109 0.0% 5 10.6 10.7 10.6 10.8 0.1
*15. po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ )
0.0% 5 13.8 13.7 13.6 13.8 0.1*
*16. po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ )
0.0% 5 13.3 13.2 13.1 13.3 0.1*
17. 68.86.237.6 0.0% 5 13.7 13.8 13.7 13.8 0.1
18. (waiting for reply)
* Packets* Pings
* Host* * Loss% Snt Last Avg Best Wrst StDev*
5. core1. ae1-bbnet1. nyc002. us. unitasglobal. net ( http://core1.ae1-bbnet1.nyc002.us.unitasglobal.net/ ) 0.0% 4 0.9 1.8 0.8 4.7 1.9
6. ae50. cr1. nyc1. us. unitasglobal. net ( http://ae50.cr1.nyc1.us.unitasglobal.net/ ) 66.7% 4 1.7 1.7 1.7 1.7 0.0
7. e0-40. cr1. nyc1. us. unitasglobal. net ( http://e0-40.cr1.nyc1.us.unitasglobal.net/ ) 25.0% 4 1.6 1.6 1.6 1.7 0.1
8. nyk-b11-link. ip. twelve99. net ( http://nyk-b11-link.ip.twelve99.net/ )
0.0% 4 2.3 2.3 2.3 2.4 0.0
9. (waiting for reply)
10. ewr-b3-link. ip. twelve99. net ( http://ewr-b3-link.ip.twelve99.net/ )
33.3% 4 2.3 2.3 2.3 2.3 0.0
11. comcast-ic-378794. ip. twelve99-cust. net ( http://comcast-ic-378794.ip.twelve99-cust.net/ ) 25.0% 4 2.4 2.4 2.3 2.6 0.2
*12. be-2312-cs03. newark. nj. ibone. comcast. net ( http://be-2312-cs03.newark.nj.ibone.comcast.net/ ) http:/ / be-2312-cs03. newark. nj. ibone. comcast. net ( http://be-2312-cs03.newark.nj.ibone.comcast.net/ )
0.0% 4 2.7 2.9 2.6 3.2 0.3*
13. 96.110.42.202 0.0% 4 10.5 10.5 9.6 11.2 0.7
14. 96.110.117.109 0.0% 4 11.8 11.8 11.8 11.9 0.1
*15. po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-xar01. killngwrth81. ct. hartford. comcast. net ( http://po-1-xar01.killngwrth81.ct.hartford.comcast.net/ )
0.0% 4 12.9 12.9 12.8 13.0 0.1*
*16. po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ ) http:/ / po-1-rur101. killngwrth81. ct. hartford. comcast. net ( http://po-1-rur101.killngwrth81.ct.hartford.comcast.net/ )
0.0% 4 13.3 13.2 13.2 13.3 0.0*
17. 68.86.237.6 0.0% 4 13.9 13.8 13.8 13.9 0.1
*18. c-75-69-240-30. hsd1. ct. comcast. net ( http://c-75-69-240-30.hsd1.ct.comcast.net/ ) http:/ / c-75-69-240-30. hsd1. ct. comcast. net ( http://c-75-69-240-30.hsd1.ct.comcast.net/ )
0.0% 4 23.9 24.1 19.7 27.2 3.2*
19. (waiting for reply)
Host Loss% Snt Last Avg Best Wrst StDev
5. core1. ae1-bbnet1. nyc002. us. unitasglobal. net ( http://core1.ae1-bbnet1.nyc002.us.unitasglobal.net/ ) 0.0% 11 1.0 4.1 0.8 32.5 9.5
6. ae50. cr1. nyc1. us. unitasglobal. net ( http://ae50.cr1.nyc1.us.unitasglobal.net/ ) 54.5% 11 1.5 1.6 1.5 1.7 0.1
7. e0-40. cr1. nyc1. us. unitasglobal. net ( http://e0-40.cr1.nyc1.us.unitasglobal.net/ ) 0.0% 11 3.8 1.9 1.5 3.8 0.7
8. nyk-b11-link. ip. twelve99. net ( http://nyk-b11-link.ip.twelve99.net/ )
80.0% 11 2.6 2.5 2.4 2.6 0.2
9. nyk-bb5-link. ip. twelve99. net ( http://nyk-bb5-link.ip.twelve99.net/ )
20.0% 11 2.8 2.8 2.7 3.0 0.1
10. ewr-b3-link. ip. twelve99. net ( http://ewr-b3-link.ip.twelve99.net/ )
70.0% 11 2.4 2.4 2.3 2.5 0.1
11. comcast-ic-378794. ip. twelve99-cust. net ( http://comcast-ic-378794.ip.twelve99-cust.net/ ) 0.0% 11 2.4 2.6 2.0 5.5 1.0
*12. be-2112-cs01. newark. nj. ibone. comcast. net ( http://be-2112-cs01.newark.nj.ibone.comcast.net/ ) http:/ / be-2112-cs01. newark. nj. ibone. comcast. net ( http://be-2112-cs01.newark.nj.ibone.comcast.net/ )
0.0% 11 3.1 2.7 2.5 3.1 0.2*
13. 96.110.42.194 0.0% 10 10.0 10.3 9.7 11.0 0.4
14. 96.110.117.109 0.0% 10 11.9 11.8 11.7 12.0 0.1
15. (waiting for reply)
*16. po-1-rur201. branford. ct. hartford. comcast. net ( http://po-1-rur201.branford.ct.hartford.comcast.net/ ) http:/ / po-1-rur201. branford. ct. hartford. comcast. net ( http://po-1-rur201.branford.ct.hartford.comcast.net/ )
0.0% 10 12.8 12.7 12.6 12.9 0.1*
17. 96.110.30.90 0.0% 10 13.1 13.2 12.9 14.8 0.6
*18. c-24-34-79-141. hsd1. ct. comcast. net ( http://c-24-34-79-141.hsd1.ct.comcast.net/ ) http:/ / c-24-34-79-141. hsd1. ct. comcast. net ( http://c-24-34-79-141.hsd1.ct.comcast.net/ )
0.0% 10 16.3 16.8 16.3 17.3 0.4*
Keys: Help Display mode Restart statistics Order of fields quit
* Packets* Pings
* Host* * Loss% Snt Last Avg Best Wrst StDev*
5. core1. ae1-bbnet1. nyc002. us. unitasglobal. net ( http://core1.ae1-bbnet1.nyc002.us.unitasglobal.net/ ) 0.0% 7 0.9 0.9 0.8 1.1 0.1
6. 145-115-232-198. static. unitasglobal. net ( http://145-115-232-198.static.unitasglobal.net/ ) 57.1% 7 1.4 1.5 1.4 1.6 0.1
7. e0-40. cr1. nyc1. us. unitasglobal. net ( http://e0-40.cr1.nyc1.us.unitasglobal.net/ ) 28.6% 7 1.6 1.7 1.6 1.8 0.1
8. e0-16. cr1. nyc2. us. unitasglobal. net ( http://e0-16.cr1.nyc2.us.unitasglobal.net/ ) 0.0% 6 1.9 1.9 1.8 2.2 0.2
9. 0. ca-1-1-c22-1. ter1. ewr1. us. zip. zayo. com ( http://0.ca-1-1-c22-1.ter1.ewr1.us.zip.zayo.com/ ) 16.7% 6 1.1 1.2 1.1 1.3 0.1
*10. be-202-pe11. newark. nj. ibone. comcast. net ( http://be-202-pe11.newark.nj.ibone.comcast.net/ ) http:/ / be-202-pe11. newark. nj. ibone. comcast. net ( http://be-202-pe11.newark.nj.ibone.comcast.net/ )
0.0% 6 2.6 2.6 2.2 2.8 0.2*
*11. be-2211-cs02. newark. nj. ibone. comcast. net ( http://be-2211-cs02.newark.nj.ibone.comcast.net/ ) http:/ / be-2211-cs02. newark. nj. ibone. comcast. net ( http://be-2211-cs02.newark.nj.ibone.comcast.net/ )
0.0% 6 2.6 2.6 2.4 2.9 0.2*
12. 96.110.42.198 0.0% 6 8.8 9.6 8.5 11.6 1.1
13. 96.110.117.109 0.0% 6 11.8 11.8 11.7 11.9 0.0
14. (waiting for reply)
*15. po-1-rur201. branford. ct. hartford. comcast. net ( http://po-1-rur201.branford.ct.hartford.comcast.net/ ) http:/ / po-1-rur201. branford. ct. hartford. comcast. net ( http://po-1-rur201.branford.ct.hartford.comcast.net/ )
0.0% 6 13.8 13.8 13.7 13.8 0.1*
16. 96.110.30.90 0.0% 6 14.0 14.3 14.0 15.1 0.4
17. (waiting for reply)
18. 50.241.68.106 0.0% 6 23.4 25.2 22.4 26.8 1.8
-- Sincerely, Blake McKeeby ______________________________________________ Outages mailing list outages@ outages. org ( outages@outages.org ) Sign up for an account https:/ / lists. outages. org/ accounts/ signup/ ( https://lists.outages.org/accounts/signup/ ) To subscribe send an email to outages-join@ outages. org ( outages-join@outages.org ) To unsubscribe send an email to outages-leave@ outages. org ( outages-leave@outages.org ) To contact the list owners outages-owner@ outages. org ( outages-owner@outages.org ) Archives https:/ / lists. outages. org/ archives/ list/ outages@ outages. org/ ( https://lists.outages.org/archives/list/outages@outages.org/ )
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