That is a Route Validation issue. The IP 35.209.30.41 is part of 35.208.0.0/15 for which a ROA has been created by AS15169 to be originated by AS15169. If check the IP on the Cogent looking glass, Cogent shows that the IP is coming from AS19527 (which is not correct according to the ROA for this prefix…
Kind regards, Robert Heuvel atom86 From: Outages <[email protected]> On Behalf Of Miller, Jon via Outages Sent: Tuesday, January 10, 2023 06:14 PM To: mike tancsa <[email protected]>; [email protected] Subject: Re: [outages] Peering issue between Cogent and Tata? 35.209.30.41. Jon Miller | Chief Information Officer Bose McKinney & Evans LLP 111 Monument Circle | Suite 2700 | Indianapolis, Indiana 46204 [email protected]<mailto:[email protected]> | P 317-684-5108 | F 317-223-0608 Assistant Contact | Brad Cline | [email protected]<mailto:[email protected]> | P 317-684-5186 | F 317-223-0186 From: mike tancsa <[email protected]<mailto:[email protected]>> Sent: Tuesday, January 10, 2023 12:03 PM To: Miller, Jon <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]> Subject: Re: [outages] Peering issue between Cogent and Tata? Out of our Toronto connection to 174, I see about 30k prefixes from 174_6453_. Can you give some sample IPs you cant reach ? ---Mike On 1/10/2023 11:59 AM, Miller, Jon via Outages wrote: We are having trouble resolving some web sites and Cogent says the issue appears to be with Tata. We can resolve the web sites from non-cogent networks. Is anyone seeing similar? Jon Miller | Chief Information Officer Bose McKinney & Evans LLP 111 Monument Circle | Suite 2700 | Indianapolis, Indiana 46204 [email protected]<mailto:[email protected]> | P 317-684-5108 | F 317-223-0608 Assistant Contact | Brad Cline | [email protected]<mailto:[email protected]> | P 317-684-5186 | F 317-223-0186 This message and any attachments may contain legally privileged or confidential information, and are intended only for the individual or entity identified above as the addressee. If you are not the addressee, or if this message has been addressed to you in error, you are not authorized to read, copy, or distribute this message and any attachments, and we ask that you please delete this message and attachments (including all copies) and notify the sender. Delivery of this message and any attachments to any person other than the intended recipient(s) is not intended in any way to waive confidentiality or a privilege. All personal messages express views only of the individual sender, and may not be copied or distributed without this statement. _______________________________________________ Outages mailing list [email protected]<mailto:[email protected]> https://puck.nether.net/mailman/listinfo/outages
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