Until now, the best fix has been the Panduit CDE2 inlet duct for Neuxs 2000 and Catalyst 4948E:
- Street price according to a google shopping search is around US $400.
- It doubles the space required for installing a FEX.
- Post-deployment installation of the CDE2 will be disruptive - it can't be retrofitted.
I've never seen one of these buggers, but I've heard that it's only 1RU, which is nice. I don't have any other detail about it.
I hope that it will be simple to retrofit onto currently installed Fabric Extenders.
UPDATE 2/1/2012 I have some additional information about the NXA-AIRFLOW-SLV.
It's orderable, but the lead times tool indicates that it's on New Product Hold. Cisco tells me that the sleeve will have full documentation and will make an appearance in the dynamic configuration tool (as an N2K option) within a couple of weeks.
In the mean time, there's this: Temperature-Solutions-note.pdf
That document includes the following pictures of the implementation:
|Duct with airflow sketch|
|FEX with duct installed|
Installing this bugger onto an existing FEX (especially one with servers mounted immediately above and below) will be an interesting exercise in problem solving, but looks possible. Power supply cables will need to be threaded through the duct before it's put into place. I wonder if the 2m power cords will be able to reach from the FEX, around the cold-side rack rail, and then all the way to the PDU in the hot aisle?
Also covered in the document is an interesting inlet duct (more of a hat) for reverse airflow FEXen (those with intake on the port end):
|Inlet hat for reverse airflow FEX|
|FEX standing proud of the rack mounting rail|