Sorry for the top post, it’s all my phone can do and I’m away from my terminal. A prior (defunct) job made a bunch of appliances that failed over into bypass mode and we used Portwell ABN 102 cards for this, it looks like Portwell is in the business of making lots of different type types of bypass cards, including copper and fiber. -Dan Sent from my iPhone
On Jun 23, 2025, at 12:05, Warren Kumari via NANOG <nanog@lists.nanog.org> wrote:
On Mon, Jun 23, 2025 at 5:40 PM, Kevin Shymkiw <nanog@lists.nanog.org> wrote:
I have seen several Fail To Wire (FTW) switches in the past. I never found them to be worthwhile, personally for a few reasons
- Only available in Copper. - You can't FTW optical since you need an OEO conversion
Actually, you can, and a bunch of people make bits to do this sort of thing. It involves micro-mirrors and a solenoid to direct signal out through one of N ports.
Here is an example from BlackBox https://www.blackbox.com/en-us/store/product/detail/Fiber-Optic-A-B-Switch-L... This particular version latches into the last selected position, but there are versions with many more input/output ports, and which fail to one position on power-outages. These generally use MEMS devices and get quite pricey...
W
- Failure scenarios were limited - Our sites didn't have backup power, so
it was pointless as we would lose the rest of the gear as well
Just my $.02
Kevin
On Mon, Jun 23, 2025 at 9:34 AM Craig Smith via NANOG < nanog@lists.nanog.org> wrote:
Hello,
Is anyone out there aware of a fail safe switch/router/1U server where upon power failure or watchdog event 2 ports would fail to pass through data, but could also be assigned an IP address and act as a bridge in "normal" mode? The desire is to have an appliance that could perform monitoring and send telemetry in between a customer device and an Internet connection but not create a single point of failure or require multiple ISP handoffs.
Best,
Craig _______________________________________________ NANOG mailing list
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