Hi William, That sound pretty good :)
Over all the years we had only one single chassis fail due to some hardware real time clock error. But I totally agree, those boxes are extremely solid. Why I have been asking about such a tool is that I have been ask to "show" the network availability in numbers, or how reliable the components are. I know that these are just theory, but I think also interesting. I just did some work in excel to calculate it (hopefully I have done it right ;) Maybe someone will find it useful. I also used some sample figures for employees and money to give a rough sum about the costs of a failure. Row E means if you have two physical parts that make up one "logical", like having 36 mgbics, and always two of them are grouped via LAG. So you have 36 hardware pieces but only 18 "virtual" components... Bye Tom -----Original Message----- From: William Olive [mailto:[email protected]] Sent: Friday, June 05, 2009 12:08 AM To: Enterasys Customer Mailing List Subject: Re: [enterasys] Reliability calculator... Tom I can't answer your question, except to say that we run a large number of DFEs and, alone in my experience of network equipment, I have never seen one fail. Like the Cabletron box they evolved from, they are bomb proof. Billo Data Communications Co-Ordinator Information Technology & Telecommunications Hunter New England Health Service ph 0249 213804 fax 0249 213038 [email protected] >>> <[email protected]> Thursday, 4 June 2009 >>> Hi, Just some non-technical question... maybe someone can help me out with this. I am looking for a tool to calculate the reliability of our network components. I found a lot of online calculators that considers the MTBF, MTBR, etc. for just one piece, but I want to do this for multiple pieces and then "sum" it up. For example I would like to know the reliability of a N3, consisting of many different components like the two power supplies, chassis, blades, MGBIC ports, etc Any ideas? BR Tom Hofmann -- Thomas Hofmann, System-/Networkadministrator, IT EB - Discover the Experience Visitors: Am Wolfsmantel 46, 91058 Erlangen, Germany Phone: +49 (9131) 7701 6969, mailto:[email protected] <mailto:[email protected]> Fax: +49 (9131) 7701 6333, http://www.elektrobit.com <http://www.elektrobit.com/> PGP-Key: http://keyserver.elektrobit.com <http://keyserver.elektrobit.com/> Elektrobit Automotive GmbH, Am Wolfsmantel 46, 91058 Erlangen, Germany Managing Director Otto������el Register Court��ürth HRB 4886 ---------------------------------------------------------------- Please note: This e-mail may contain confidential information intended solely for the addressee. If you have received this e-mail in error, please do not disclose it to anyone, notify the sender promptly, and delete the message from your system. Thank you. --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] ---------------------------------------------------------------- Please note: This e-mail may contain confidential information intended solely for the addressee. If you have received this e-mail in error, please do not disclose it to anyone, notify the sender promptly, and delete the message from your system. Thank you. --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
MTBF calculation.xls
Description: MTBF calculation.xls
