Content
Chad,
Mason worked up a highly detailed report and plan of attack for the network isolation. Take a look at it and let us know if you see any faults or red flags here.
After my discussions with you today I think we will proceed to first do some troubleshooting of the network hardware as you suggested, and then move to segregation if all checks out.
Thanks for your time!
-Kevin Seifert, AutoSys LLC
________________________________
From: Chad Crawford <ccrawford@spiceintegration.com>
Sent: Thursday, February 26, 2026 10:10 AM
To: Kevin Seifert <kevin@autosysnet.com>
Cc: John Bowers <jbowers@spiceintegration.com>; Mason Radke <mason@autosysnet.com>
Subject: Re: SCADA Network VLAN consult
Perfect. Sounds like a plan! I'm fairly certain both NICs on the PLC share the same internal microcontroller so regarding overall throughput I'm not certain that would improve things. However this fiber line that connects CP4000 to the rest of the network; does it use Media converters/SFP Modules? It may be that the SFP modules are unmatched/faililng/not the correct wavelength or fiber line is kinked somewhere. Just to rule it out completely I would do a throughput test on each side of that fiber run, possibly use an OTDR to see if there is any signal loss or leakage happening in the specific fiber strand.
You can call me whenever you'd like to discuss.
Chad Crawford
Chief Technical Officer
SPICE Integration
805.464.4111
C-10 License: 1110179
California Small Business Certification ID: 2036507
[https://ci3.googleusercontent.com/mail-sig/AIorK4wQmJMpYT2The9LtRL2Xv-kJwd9DoLcdOXjleFUqX99PYaxvwrfFkcagMimKJ0X9cNcvP_05EUH06U9]
On Thu, Feb 26, 2026 at 1:01 PM Kevin Seifert <kevin@autosysnet.com<mailto:kevin@autosysnet.com>> wrote:
Mason and I are out here now doing the leg work to document the current SCADA/PLC network here in the new side of the plant called CP4000.
Our issue is SCADA is extremely slow to get data to/from this new PLC. There is a fiber line coming out here, so pretty sure it's not due to a slow trunk line.
There are about 30 VFDs/Smart Overloads in this MCC, plus three other PLCs that the CP4000 PLC communicates with. All of this is on the same managed switch and the same port on the CompactLogix PLC, along with the connection to SCADA.
We are thinking that by isolating all the IO to one of the two NICs on the PLC, thereby getting it off of the main scada net, that will help. But we are unsure of the exact logistics of such.
I will forward the result of our work here today, and we can discuss further.
-Kevin Seifert, AutoSys LLC
________________________________
From: Chad Crawford <ccrawford@spiceintegration.com<mailto:ccrawford@spiceintegration.com>>
Sent: Thursday, February 26, 2026 9:45 AM
To: Kevin Seifert <kevin@autosysnet.com<mailto:kevin@autosysnet.com>>
Cc: John Bowers <jbowers@spiceintegration.com<mailto:jbowers@spiceintegration.com>>; Mason Radke <mason@autosysnet.com<mailto:mason@autosysnet.com>>
Subject: Re: SCADA Network VLAN consult
Hey Kevin! Yes, I do! I would love the opportunity to show them our IT capabilities as we have been trying to land them as an IT client for a good while.
What can I do to help?
Chad Crawford
Chief Technical Officer
SPICE Integration
805.464.4111
C-10 License: 1110179
California Small Business Certification ID: 2036507
[https://ci3.googleusercontent.com/mail-sig/AIorK4wQmJMpYT2The9LtRL2Xv-kJwd9DoLcdOXjleFUqX99PYaxvwrfFkcagMimKJ0X9cNcvP_05EUH06U9]
On Thu, Feb 26, 2026 at 12:43 PM Kevin Seifert <kevin@autosysnet.com<mailto:kevin@autosysnet.com>> wrote:
Hey Chad!
Do you have a good background in VLAN implementation? If so we could use your expertise at South County Sanitation.
Kevin
## Attachments
- [[20260226_19c9d0463169_ICS_Network_Segmentation_Plan_Rev3.2_FINAL.pdf]]