I have a Cat 6500 with 4 port 10GE XENPAK and I am getting a Nexus 5010 soon. I am exploring the options for connecting the Nexus 5000 to Cat6500. Since the Nexus 5000 supports only SFP+ transceiver for 10GE connections, I would like to know, if a convertor module for XENPAK exists ( like oneX convertor for X2 to SFP+ ). If no such convertor option is available, can I buy a XENPAK SR Transciever ( XENPAK-10GB-SR ) for Cat 6500 and connect that to Nexus SFP+ ( SFP-10GB-SR ) transceiver. Since Nexus has optical interoperability with XENPAK, I suppose the 10GE link should work. Please comment. Thanks.
I've used XENPAC w/X2 for uplink purposes and it worked out fine. Not sure about how SFP+. will work with XENPAC. Although, SFP+ is 10G capable, it has a few operational differences in comparison to the other two modules that may or may not hinder any performance.
Since the modules aren't cheap, I know you want reassurance. I would suggest you inquire with the vendor you plan on purchasing from (they are the experts and also perform testing). You may also want to inquire with Cisco sales reps (support).
Just found XENPAC working well with SFP+ in lab.
You should be good to go.