I had a customer recently with old switches between z14 and DS8870. Both ends were rated higher than the switches and demonstrably - from 74-8 - the links had been negotiated down.
That might or might not matter to you. Long ago I had a situation where customer was running PPRC at high speed across town over low-speed fabric. That caused errors and, IIRC, outages. That probably DOES matter to you. But, as always, finance might override that. Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: [email protected] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/mpt/ or https://itunes.apple.com/gb/podcast/mainframe-performance-topics/id1127943573?mt=2 From: "Alan(GMAIL)Watthey" <[email protected]> To: [email protected] Date: 26/10/2017 09:27 Subject: Re: z14 FICON and (old) Brocade switch Sent by: IBM Mainframe Discussion List <[email protected]> What are they gossipping about? Certainly the new Multihop feature won't work on old SAN Switches. That's where you have three switches in the path. Ficon has only supported either a single hop or one hop (cascading) up until now. Also, old switches might not support dynamic routing. Old switches may only support static switching (port routing on really old switches and the slightly better device routing on less old switches). Old switches won't support 16Gbps either so they'll negotiate down to 8 or lower. That'll depend upon fibre type and distance as well. -----Original Message----- From: R.S. [mailto:[email protected]] Sent: 25 October 2017 2:38 pm Subject: z14 FICON and (old) Brocade switch I heard some gossips about z14 with new FICON Express16S+ and old FICON switches. Is it real issue or just FUD to sell new SAN devices? I have some 5100 switches (8Gbps) and I don't like to replace it just because it "wasn't certified". Any clue? -- Radoslaw Skorupka Lodz, Poland ====================================================================== -- Treść tej wiadomości może zawierać informacje prawnie chronione Banku przeznaczone wyłącznie do użytku służbowego adresata. Odbiorcą może być jedynie jej adresat z wyłączeniem dostępu osób trzecich. Jeżeli nie jesteś adresatem niniejszej wiadomości lub pracownikiem upoważnionym do jej przekazania adresatowi, informujemy, że jej rozpowszechnianie, kopiowanie, rozprowadzanie lub inne działanie o podobnym charakterze jest prawnie zabronione i może być karalne. Jeżeli otrzymałeś tę wiadomość omyłkowo, prosimy niezwłocznie zawiadomić nadawcę wysyłając odpowiedź oraz trwale usunąć tę wiadomość włączając w to wszelkie jej kopie wydrukowane lub zapisane na dysku. This e-mail may contain legally privileged information of the Bank and is intended solely for business use of the addressee. This e-mail may only be received by the addressee and may not be disclosed to any third parties. If you are not the intended addressee of this e-mail or the employee authorized to forward it to the addressee, be advised that any dissemination, copying, distribution or any other similar activity is legally prohibited and may be punishable. If you received this e-mail by mistake please advise the sender immediately by using the reply facility in your e-mail software and delete permanently this e-mail including any copies of it either printed or saved to hard drive. mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950 Warszawa, www.mBank.pl, e-mail: [email protected]ąd Rejonowy dla m. st. Warszawy XII Wydział Gospodarczy Krajowego Rejestru Sądowego, nr rejestru przedsiębiorców KRS 0000025237, NIP: 526-021-50-88. Według stanu na dzień 01.01.2016 r. kapitał zakładowy mBanku S.A. (w całości wpłacony) wynosi 168.955.696 złotych. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
