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Heath
 Post subject: Cisco 10 Gig question
PostPosted: Fri Apr 20, 2012 11:13 pm 
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This may be a dumb question, but is a 10G interface also capable of 10/100/1000? Or at least just 1G?

Specifically, I'm interested in getting a 10G line card for my core 6509 to replace a 1G card, and then gradually upgrading the distribution layer switches to 10G. But most of them would remain at 1G for a while. But all the 10G stuff I see is clearly divided from the 10/100/1000 stuff.
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Vito_Corleone
PostPosted: Fri Apr 20, 2012 11:15 pm 
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Depends on the hardware. Some is 10g only and some is 1/10g.

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Otanx
PostPosted: Sat Apr 21, 2012 12:59 pm 
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If I remember correctly the 6500 10G stuff is 10G only.

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Reggle
PostPosted: Sun Apr 29, 2012 5:30 am 
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I've not found one yet that will negotiate down to 10/100 Mbps.

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Vito_Corleone
PostPosted: Sun Apr 29, 2012 9:18 am 
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They don't

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jacksonh
PostPosted: Sun Apr 29, 2012 10:53 am 
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The only 1G/10G interfaces I've seen have been on the Nexus platforms.

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srg
PostPosted: Sun Apr 29, 2012 11:31 am 
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C3KX-NM-10G also, to the 3750X. Im not 100% sure, but isnt it that like SFP+ often can be backwards compatible with standard 1G SFP, but X2 and XENPAK is 10G only? Otoh there arent any SFP+ cards to the 6500, only X2 and XENPAK.

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Vito_Corleone
PostPosted: Sun Apr 29, 2012 11:37 am 
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X2 can take the TwinGig adapters, which have two SFP slots.

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srg
PostPosted: Sun Apr 29, 2012 11:39 am 
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Right, good catch. Is that always the case, that any X2 port on any blade can use a TwinGig? Or does it depend also, like the SFP+/SFP case.

Also the X6904-40G-2T are able to use the FourX CFP to insert 4*10G SFP+, but doesnt seem to be backward compatible with 1G SFP.

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Vito_Corleone
PostPosted: Sun Apr 29, 2012 11:41 am 
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Nah, every X2 doesn't take TwinGig. I think it's only 3K and 4500.

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kerpap
PostPosted: Wed May 02, 2012 7:53 pm 
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6700 series blades are stuck at 10Gig.

http://www.cisco.com/en/US/prod/collate ... Sheet.html

the best way to tell is if the interface is listed in product data as 10/100/100/10GIG (10000?)

you can use a CVR-X2 and configure for 2 1GIG slots however as vito mentioned this is only on 3560E, 3750E and X series and 4516-10GE SUPs (as well as other 4500 series SUPs with 10GE)

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