nanog mailing list archives

Re: Standard DC rack rail distance, front to back question


From: Mark Stevens <manager () monmouth com>
Date: Thu, 27 Apr 2023 11:17:27 -0400

Lucky you with a 19" data rack. All I have are 23" telco racks but I will say, the 23" extension ears from Cisco are serious and my router chassis' don't sag.

Mark

On 4/27/2023 10:04 AM, Chris Marget wrote:

On Thu, Apr 27, 2023 at 9:53 AM Chuck Church <chuckchurch () gmail com> wrote:

    for a Cisco ASA1001, there aren’t rails, but rather front and back
    ‘ears’ you use to hit both front and back posts.


Front *and* back ears? I'm not sure what an ASA 1001 is (ASR?) but my experience with these boxes is that they have a single pair of ears which can be mounted front OR back.

The heavier / deeper 1RU devices do tend to sag alarmingly.

     Is there a ‘standard’ distance between front and back rails that
    devices usually adhere to?


If you're thinking of setting the front/back distance to accommodate a specific device, table 2 might be of some interest:
https://i.dell.com/sites/doccontent/business/solutions/engineering-docs/en/Documents/rail-rack-matrix.pdf


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