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тАО10-01-2009 12:29 PM
тАО10-01-2009 12:29 PM
Looking at Flex-10 Options
I've read a reasonable amount on the Flex-10 but still need answers to a couple of questions.
Can you deploy BL490c blades (with onboard Flex-10 nics) and uplink via VC 1/10g modules?
If so, can you still do any kind of multi-nic "trick" at the blade end (albeit without the bandwidth) or does it *require* the Flex-10 modules?
Did I read incorrectly or are the SFP(+?) modules for the Flex-10 module really ┬г1000 each???
If using a redundant pair of 1/10G modules, can *both* 10Gb uplinks per module be connected to a switch to give 20Gb aggregated bandwidth to the 16 server uplinks? We never had 10G on my first deployment so we just trunked the 8 1Gb links.
Thanks for your time!
Paul
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тАО10-01-2009 01:01 PM
тАО10-01-2009 01:01 PM
Re: Looking at Flex-10 Options
yes, you can connect onboard FlexNICs from BL490c's to VC 1/10 modules in bay 1 and 2. The NICs will only run at 1Gb and you will not be able to do any multi-nic tricks aka carve out multiple FlexNICs.
SFPs and SFP+ can be very expensive, yes. You might want to take a look at Direct-Attach-Cables (DACs).
you can aggregate 2 10Gb Interfaces from teh same Module in to a 20Gb LACP trunk. You can not create an LACP channel with one 10Gb interface from one module and one from the other VC module. I.E. an LACP channel can not span multiple VC Modules.
But there are ways to make sure all VC uplinks are active by employing things liek an Active/Active Uplink Configuration.
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тАО10-01-2009 01:12 PM
тАО10-01-2009 01:12 PM
Re: Looking at Flex-10 Options
I'm aware of the inability to span LACP across modules.
Actually, now that I think about it, is it feasibly to connect *all* uplinks on a 1/10 (even though it's arguably overkill).
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тАО11-06-2009 03:15 PM
тАО11-06-2009 03:15 PM
Re: Looking at Flex-10 Options
I have yet to work on this environment, but I am curious. Do you usually use flex10 and the 1/10Gb modules together? What if you want the benefits of flex, but dont have XFP uplinks to the network?
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тАО11-06-2009 06:44 PM
тАО11-06-2009 06:44 PM
Re: Looking at Flex-10 Options
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тАО11-09-2009 12:59 PM
тАО11-09-2009 12:59 PM
Re: Looking at Flex-10 Options
So this allows you to provision flex NICs for all blades in the enclosure through flex, but still use the 1/10 for connectivity to the external network?
Is this the recommended solution?
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тАО11-10-2009 02:01 AM
тАО11-10-2009 02:01 AM
Re: Looking at Flex-10 Options
(a) A requirement for more than 8 NICs or 20GB bandwidth on servers with 10GB NICs.
(b) Mixed servers with 1Gb and 10Gb NICs and you need more than 2 NICs on the 1Gb servers.
(c) Spare VC 1/10 around and want to use these to uplink rather than buying expensive SFPs for the Flex-10. Using CX4 cables to stack.