Re: Ethernet breaker
- From: googlegroups@xxxxxxxxxx
- Date: 15 Sep 2005 14:27:47 -0700
Rich Noonan wrote:
> 1) Use a managed ethernet switch at the center of the control system
> and disable individual switch ports as needed. The problems are that
> switch silicon
> (arguably or provably) has a higher failure rate than say a
> mechanical/electrical switch and to the user/safety inspector it still
> looks and feels like a software switch.
I have seen something that reminds me of what you're asking for, except
it's completely the opposite!
Years ago I had some external (to a webserver) hardware SSL
accelerators. They were designed to go inline with a webserver's
Ethernet cable, and do the SSL work whenever traffic appeared on
TCP:443.
These boxes had 2 RJ45 Ethernet connectors on the front panel. These
jacks were connected to *both* the ethernet transceivers of the
hardware in the box *and* to each other through some DPDT relays (i
guess).
The idea was that *even* if power to your SSL box was cut, the
webserver would stay online.
So, yes, it's completely the opposite of what you're looking for, but
it makes the point that running ethernet through some relays might be
okay :-)
/chris
.
- Follow-Ups:
- Re: Ethernet breaker
- From: glen herrmannsfeldt
- Re: Ethernet breaker
- References:
- Ethernet breaker
- From: Rich Noonan
- Re: Ethernet breaker
- From: Rich Noonan
- Ethernet breaker
- Prev by Date: Cascading Wireless/Wired Routers
- Next by Date: Re: Ethernet breaker
- Previous by thread: Re: Ethernet breaker
- Next by thread: Re: Ethernet breaker
- Index(es):
Relevant Pages
|
