Questions tagged [power]

For questions about power and power management on network devices. It should only be used for on topic network devices. For instance, you have a switch with PoE, but the power supply might be faulty.

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How do i prevent dataloss, when installing an ethernet cable fairly close to an electric cable? [duplicate]

I want to install an ethernet cable and an electric cable (230V) right next to each other (same cable tube, currently 20mm in diameter, length up to 100m (i think its under 75m but i didn't measure ...
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HP ProCurve Switch 4100 series - Checking PSU status & S/N from the CLI

Do you know if there is any CLI command available on the very old HPE Procurve 4108gl/J4865A switches where you can see how many PSUs are installed in the chassis, what's their current status and ...
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Is wifi power consumption related to password length

For wifi the Max password length is 63 characters. When I choose such a long password will this lead to notably higher power consumption of the network device (router, smartphone, ...)? I would guess ...
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mx480 "PEM 3 absent" alarm

I have an alarm showing up on an MX480 after removing unused PEMs: "PEM 2 Absent". The mx480 only has 2 FPCs populated, which keeps it fully redundant with 2 PEMs online (each zone is 25%). ...
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PEM Modules Redundancy in Juniper SRX3600 series Firewall

We have Juniper SRX3600 running in our network. At the moment only 2 x PEM Modules (AC Power Supply) are installed in the chassis while other 2 x PEM are not. This is shown below from the output of '...
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2 votes
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Networking switch boxes distance from 480v transformers

I am working on a network layout for a manufacturing plant and ran into a situation I am just not experienced in. We have 6 steel beams from the ground to the ceiling that we are planning on mounting ...
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Is it really necessary for APs to constantly send beacon frames (always be in "discovery mode")?

Why do wireless APs constantly transmit (e.g., with a beacon interval of 10×/sec.), even when no devices are connected to them? Doesn't that just cause needless RFI? Is it really necessary to ...
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Cisco 3750X Power Cable

I received a Cisco 3750X the other day. I went to go plug it in for testing and found that the standard three prong female power connector is no longer compatible with the power supply. Cisco has ...
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5 votes
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Network Switch Power Isolation

I run a small office network that uses TP-LINK T1600G-28TS (TL-SG2424) JetStream switches. The office is across two buildings, each fed by a different phase of power. We've recently installed HD ...
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1 vote
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Feeding a PoE capable device with variable power supply over TIA568 A cable (DC spares)

The purpose of such a variable power over Ethernet supply would be to test network equipment that are receiving power over PoE under condition of conditions of low voltage or current and determining ...
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Cisco C3750G Power On Failure

I have been using my C3750G for a while now. It has been used normally and hasn't been exposed to any excess heat but for some reason when I issued the 'reload' command the other day the switch didn't ...
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How close can Ethernet cables be to power line if in parallel?

How close can unshielded CAT 5e/6/6a cables be in parallel to 110V power lines in rooms of common residential/commercial buildings before interference becomes an issue? If proximity between the two ...
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show current power consumption Cisco 3650 IOS 3.07.04E

What command can I issue to see the current power (POE and System Power) on a Cisco 3650 Switch running IOS 3.07.04E. Sh Env Power #shows me power supplies, not usage. Sh Power Inline #show me the ...
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