nanog mailing list archives
Re: Network card with relay in case of power failure
From: Warren Kumari <warren () kumari net>
Date: Thu, 18 Jun 2020 12:01:49 -0400
On Wed, Jun 17, 2020 at 4:15 PM Dovid Bender <dovid () telecurve com> wrote:
Hi, I am sorry if this is off topic.I was once demoed a network device that had two interfaces. The traffic would go through the device. If there was a power cut or some other malfunction there would be a relay that would physically bridge the two network interfaces so the traffic would flow as if it was just a network cable. Is anyone aware of such a network card or device?
Yup -- the Peribit devices used to do this - one of them died, so I decided to repurpose it into a webserver. Their implementation seemed to just be a PCI card and some relays - Ethernet went into RJ-45 jacks on the relay card, and PCI voltage held the relays "on", routing the Ethernet to an internal NIC. When the device lost power the relays would close, and bypass the device. The PCI card also had some chips on it, but I never bothered trying to figure out if they were for heartbeat, or just power conditioning, etc. (I was going to reply to this thread yesterday and include photos, but I think I've thrown the cards out... ) W
TIA.
-- I don't think the execution is relevant when it was obviously a bad idea in the first place. This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants. ---maf
Current thread:
- Network card with relay in case of power failure Dovid Bender (Jun 17)
- Re: Network card with relay in case of power failure Roel Parijs (Jun 17)
- Re: Network card with relay in case of power failure TJ Trout (Jun 17)
- Re: Network card with relay in case of power failure Yang Yu (Jun 17)
- Re: Network card with relay in case of power failure Dovid Bender (Jun 17)
- Re: Network card with relay in case of power failure TJ Trout (Jun 17)
- Re: Network card with relay in case of power failure Joel Jaeggli (Jun 17)
- Re: Network card with relay in case of power failure Billy Crook (Jun 17)
- Re: Network card with relay in case of power failure Warren Kumari (Jun 18)
- Re: Network card with relay in case of power failure William Herrin (Jun 18)