On 15/03/2010, at 5:54 AM, <[email protected]> <[email protected]> wrote:
>>> These days you can get cheap twinax 10G cables with SFP+ at the ends >> to >>> connect two Cisco switches or two Procurves. Short distance only of >>> course, but very cheap. > > They're also useful for connecting servers to top-of-rack 10G switches. > > But curiously, they're currently unsupported by Cisco on the Nexus 7000 > platform: > http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/ps9512/Data_Sheet_C78-437757.html they are currently unsupported on N7K for good reasons that are technical. strongly suggest that you don't use it for a production environment. > > They seem to work fine in this application, however. suggest you do "shut" on one side of the link and see if the other end notices the link is down. >> As far as I'm aware, HP are particularly crappy about vendor locking >> their >> transceiver ports and will refuse to drive any "third party" >> transceiver. > > There's no problem using a Cisco SFP+ cable in an HP *server* depends on the 'server'. for a NIC/CNA - yes. for any HP blade (embedded switch): HP require HP transceivers and don't provide any "unsupported transceiver" at all. > >>> Also, twinax SFP+ are manufacturer-specific. Is it possible to get a >>> twinax-cable with a Cisco-coded SFP+ at one end and a Procurve-coded >>> SFP+ at the other? > > This might not be necessary. Network World recently did a 10G switch review: > http://www.networkworld.com/reviews/2010/011810-ethernet-switch-test.html > > One of the documents linked from the review was the vendor features > questionnaire. In it, Cisco said: > > Nexus 5000 also provides interoperability support for non-Cisco > Twinax cabling. Supported vendors include EMC, IBM, HP StorageWorks > and NetApp > > This, and an emailed promise from an HP rep are the only inter-vendor twinax > support claims I've seen to date. I'm hopeful that vendors will come to > their senses on pluggables, at least for twinax cabling. HP are currently locking in to HP transceivers. email promise or not, thats the current behaviour. cheers, lincoln. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
