Juniper MX480, 3rd party vendor says "don't run it at 120V AC", Juniper datasheet says you can
See title.
Is anybody out there running any MX480's on standard 120V outlets? Any problems with this setup?
Thanks
Posted Jan 8, 2016, 8:41 PM UTC
010
If the PSUs support it, it's fine to do so. HOWEVER re-run your power budget for the chassis and take 120v into account.
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So when you asked the 3^rd party vendor "why not?" the response was...?
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"We don't know of any body else doing this".
So I phoned a friend ;) (aka reddit)
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Based on what I'm seeing in the following link running at 110V AC requires three legs of power so you only get a single PSU of redundancy and not two. This means with a normal A+B power delivery if a one side goes down the router may not have sufficient power to operate normally.
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Welp. That would suck :(
Guess our DC power bill is going to be much higher every month after all sigh
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You don't have 208V or 240V power available?
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Nope, everything in the DC is running on 120V AC A + B feeds. Having to convert the power over to ~220 is going to run us substantially more.
At our POPs it's not a big deal, but it is in the DC.
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Does the 480 have direct current PSUs? I know the 960 does. A bit circuitous but you could potentially do DC with separate rectifiers to allow for loss of one feed?
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[deleted]
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We were told the same thing, I forget if it was TW Cable or TW Telecom we were working with. After much grinding of teeth, we did it their way. The device was their carrier circuit termination device, so we didn't manage it. So we did it the way they wanted it, even though it was more work for us.
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http://www.juniper.net/techpubs/en_US/release-independent/junos/topics/reference/specifications/calculating-power-requirements-mx480.html