Yes, and there is no such thing as a crossover cable, all you need to do is connect them together with a standard cable, and it will work fine. Also, in this configuration, you should be able to push the MTU up to the max (64k, I think), since you won't be going through a switch or anything.
On Tue, Feb 1, 2011 at 1:48 PM, R.S. <[email protected]> wrote: > Hal Merritt pisze: > > Two Issues. >> >> First, I've been tasked to procure the correct cables for a OSA-Express3 >> (feature code 3370 on a 2098). >> >> The only specification I can find is '9 micron single mode fiber'. I'm >> having trouble relating that specification to any verbiage on the cables or >> their packaging. Can any one point me to a Rosetta Stone to translate the >> various markings? >> >> This sounds an awful lot like a standard long wave FICON cable. >> >> Are these, in fact, one and the same? If so, can someone point me a >> definitive IBM source? (This will be a mission critical application and >> management wants 'works for sure' rather than 'should work'). >> >> >> Second, the specific mission is to interconnect two 2098's. We could use a >> switch (but that's a complicated solution) or we could use a 'cross over' >> cable. I am thinking that all I have to do is swap the polarity of one end >> of the fiber cable and I'm there. Anyone that has actually done this and >> have it in high volume production? (Please, no speculation). >> > > In simple words, 9um cable is single-mode fiber, the same as for FICON LX. > You can read about it in sg245444 IBM System z Connectivity Handbook, > especially App. B. > > BTW: Things get more complicated when talking about multimode and > (contemporary) big speeds - there *IS* difference between 50um and 62,5 um, > and cable "class" (OM1, OM2, OM3, OM4 - see ISO/IEC 11801) is important. > Fortunately, it is NOT your case. You need OS2 SM 9/125 um. > > Caution: cable (fiber) is one issue, another one is connector. It can be SC > or LC (or many many more) - all new cards require LC ...but it's not > everything you need to know! It can be LC/AC or LC/PC or subviariants. > Honestly I simply don't remeber those details - the "typical" variant is > the proper one. > > > > > Eth connection. > I don't know for sure. I never connected two Eth cards directly (I mean > fiber optic media). However it can work (my divagation, I would try it). > It won't work FOR SURE in case of 1000BaseT (copper media) at 1000Mbps > speed. > > > BTW: OSA Express3 is ambigous. FC 3370 is unambigous. It is OSA Ex3 10GbE > LR. It requires LC cnnectors and 9um single mode fibers. > > > HTH > -- > Radoslaw Skorupka > Lodz, Poland > > > -- > BRE Bank SA > ul. Senatorska 18 > 00-950 Warszawa > www.brebank.pl > > S d Rejonowy dla m. st. Warszawy XII Wydzia Gospodarczy Krajowego Rejestru > S dowego, nr rejestru przedsi biorców KRS 0000025237 > NIP: 526-021-50-88 > Wed ug stanu na dzie 16.07.2010 r. kapita zak adowy BRE Banku SA (w ca o > ci wp acony) wynosi 168.248.328 z otych. > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
