Remote power cycle recommendations
bruns at 2mbit.com
Mon Apr 30 16:19:38 UTC 2018
On 4/30/2018 9:46 AM, Stephen Satchell wrote:
> I've worked with APC, Synaccess, and a couple other brands of power
> controllers. One constant: the IP stack implementations tend to be a
> bit fragile. This is not restricted to power controllers; I have a GPS
> NTP appliance that is affected by the same sorts of things.
> I'll stick with APC and Synaccess, because I currently work with those.
> You want to avoid presenting these conditions to the embedded stack:
> 1. ARP storms
> 2. Lots of layer 2 and layer 3 broadcast traffic
> 3. Probes for ports not implemented in the stack
> 4. Too much traffic (SNMP in particular)
> I like keeping all such devices on a single management VLAN dedicated to
> embedded-stack devices. The Ethernet hardware tends to be competent at
> filtering packets not intended for the device, so you don't have to go
> overboard with VLANs. It's the software behind the hardware that is
> easy to overwhelm if you throw too many packets at it.
> (But you knew this already)
In particular, if at all possible, do not use the AP9606 era cards with
the APCs. They are 10BaseT and take fragile to a whole new level. I
usually have to manually force the port to 10 on the switch or put it on
a cheap dumb older switch.
The 961X series is 100BaseT and somewhat less temperamental.
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