RE: Cogent announcing more specific prefixes?
We received Cyclops alerts for one of our /24's. It claimed that the prefix was being announced by a provider in Hong Kong. Our alerts fired between 10:36:30 and 10:40:36 UTC today, 2010-11-25. The longest time period that any alert was active was 2m 58s. All appears to be well at this moment; the prefix is not being announced by that provider according to routeviews.org. It is highly unusual for us to receive alerts. We have only 5x /24 networks being monitored. Given that you received similar alerts less than 1.5 hr later, I wonder if this was a systemic problem. -Brian Knight Sr. Network Engineer Mizuho Securities USA Inc http://www.mizuho-sc.com/ * Please note that all NANOG list members and archive readers may consider themselves Recipients of this message, in reference to the appended disclaimer. (I don't add it myself and can't control it, sorry.) > -Original Message- > From: ML [mailto:m...@kenweb.org] > Sent: Thursday, November 25, 2010 4:26 PM > To: nanog@nanog.org > Subject: Cogent announcing more specific prefixes? > > Anyone else get alerts from their BGP monitoring system (In my case > Cyclops) saying Cogent briefly announced some more specific prefixes? > > AS path as reported by Cyclops: 7575 46135 174 174 > > /20s broken into /23s > /23s became /24s > > Also saw alerts for one to one (/23 announced has /23) > > All alerts had a timestamp of: 2010-11-25 12:01:12 UTC CONFIDENTIAL: This e-mail, including its contents and attachments, if any, are confidential. It is neither an offer to buy or sell, nor a solicitation of an offer to buy or sell, any securities or any related financial instruments mentioned in it. If you are not the named recipient please notify the sender and immediately delete it. You may not disseminate, distribute, or forward this e-mail message or disclose its contents to anybody else. Unless otherwise indicated, copyright and any other intellectual property rights in its contents are the sole property of Mizuho Securities USA Inc. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. Although we routinely screen for viruses, addressees should check this e-mail and any attachments for viruses. We make no representation or warranty as to the absence of viruses in this e-mail or any attachments. Please note that to ensure regulatory compliance and for the protection of our customers and business, we may monitor and read e-mails sent to and from our server(s). #
RE: IP Address Management Tool
One of our engineers has started playing with dcTrack from Raritan; he quite likes it so far. It primarily manages information about data centers, like power draw, physical layout, and cable connections. It also provides a change management system tied to power / cabling requirements. In addition to all of that, it will also manage IP addresses. :) http://www.raritan.com/products/infrastructure-management/dctrack/ It is neither open source nor freely available software. It may be (okay, it's likely to be) overkill for your environment. Then again, if a spreadsheet isn't cutting the mustard, you may have other needs along with IP address management. Hope this helps, -Brian Knight Sr. Network Engineer Mizuho Securities USA Inc http://www.mizuhosecurities.com/ * Please note that I do not speak for my employer - only for myself. ** No one I know works for, owns or endorses the company mentioned above. *** All members of the mailing list may consider themselves recipients of this message, in terms of the disclaimer automatically attached below. > -Original Message- > From: D C [mailto:cassel...@gmail.com] > Sent: Tuesday, June 01, 2010 8:08 AM > To: nanog@nanog.org > Subject: IP Address Management Tool > > I am looking for a better way to manage IP addresses. I am > currently using an excel spreadsheet, but this is becoming > cumbersome as more and more addresses are being added. Does > anyone have any recommendations? > > Thanks, > Danielle > CONFIDENTIAL: This e-mail, including its contents and attachments, if any, are confidential. It is neither an offer to buy or sell, nor a solicitation of an offer to buy or sell, any securities or any related financial instruments mentioned in it. If you are not the named recipient please notify the sender and immediately delete it. You may not disseminate, distribute, or forward this e-mail message or disclose its contents to anybody else. Unless otherwise indicated, copyright and any other intellectual property rights in its contents are the sole property of Mizuho Securities USA Inc. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. Although we routinely screen for viruses, addressees should check this e-mail and any attachments for viruses. We make no representation or warranty as to the absence of viruses in this e-mail or any attachments. Please note that to ensure regulatory compliance and for the protection of our customers and business, we may monitor and read e-mails sent to and from our server(s). #
RE: Cogent Outage?
> -Original Message- > From: Joe Johnson [mailto:j...@riversidecg.com] > Sent: Thursday, January 14, 2010 11:31 AM > To: nanog@nanog.org > Subject: Cogent Outage? > > We just lost Cogent across the country, along with several > sister companies. Can't get through to a support person. Any > idea what's going on? We lost access through Cogent in the Chicago area for a small number of sites. Some partners also reported problems getting to us. Cogent's updated status page includes the Jersey fiber cut and a routing problem: "Customers with traffic going through or on the east coast may be experiencing packet loss and higher than normal latency due to a fiber cut in New Jersey. Splice crews are at the site. There is no ETR at this time. The Cogent ticket to reference for this issue is HD2082680. A separate issue has been identified for customers in Toronto and Chicago. This appears to be a routing issue and the Cogent NOC is looking into the problem. There is no ETR at this time. The Cogent ticket to reference for this issue is HD2082851 " > Joe Johnson > Chief Information Officer > Riverside Consulting Group, Ltd. > Phone: 708.442.6033 x3456 > Fax: 708.442.9722 > j...@riversidecg.com > www.riversidecg.com -Brian Knight Sr. Network Engineer Mizuho Securities USA Inc http://www.mizuho-sc.com/ * Please note that I do not speak for my employer - only for myself. ** The below disclaimer is standard; the reader may consider addressees, mailing list members, and archive viewers to be intended recipients. CONFIDENTIAL: This e-mail, including its contents and attachments, if any, are confidential. It is neither an offer to buy or sell, nor a solicitation of an offer to buy or sell, any securities or any related financial instruments mentioned in it. If you are not the named recipient please notify the sender and immediately delete it. You may not disseminate, distribute, or forward this e-mail message or disclose its contents to anybody else. Unless otherwise indicated, copyright and any other intellectual property rights in its contents are the sole property of Mizuho Securities USA Inc. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. Although we routinely screen for viruses, addressees should check this e-mail and any attachments for viruses. We make no representation or warranty as to the absence of viruses in this e-mail or any attachments. Please note that to ensure regulatory compliance and for the protection of our customers and business, we may monitor and read e-mails sent to and from our server(s). #
