1. Control System Network
• Requirements
• Development Network
• Operations Network
• Physically
• Logically
• Technology
• Schedule

2. Background Ideas LCLS will have 30 year lifetime
Best equipment now will be obsolete in 5 years
Invest in Infrastructure which allows expansion
More complex than current EPICS networks for SLC or SPEAR
Not a typical “enterprise network”
Need bandwidth between IOCs for fast feedback or localized control, not just to central “server”
The servers are in the field, and clients are centralized (although we have centralized boot and file servers)

3. Four Subnets

4. Development Subnet

5. Access allowed only from Access Subnet
Operations Network
Must be able to operate LCLS if network is disconnected from SLAC or Internet
Able to stand alone, must have servers
Must have machines to run EPICS clients
Access allowed only from Access Subnet
SSH Servers, Web Servers
EPICS Gateway Servers
Offline Data Cache Servers

6. Operations Network
Must also support access from the existing SLC network for SLC-aware IOCs (SAI).
A proxy server on the SLC network must have access to all SAIs on the operations network
SAIs must also be fully accessible from the operations network, as would any normal IOC.

7. The Ideal Network

8. Star Configuration

9. Fiber to Every Third Area

10. Distribution Layer

11. Physical Layout

12. Private IP Address Ranges
Class A to
Class B to
Class C to
Operations Network, Class A
Not because of the number of nodes allowed, but because we can better organize and classify

13. Private IP Address Range
Class A Operations Network
Format is X.Y
Y - Node on the Injection Subnet
Y - Node on the subnet for Sector 21
Y - Node on the subnet for Sector 30
Y - Node in Undulator Hall
Y - Node in Front-end Enclosure
Y - Node in Fast Feedback Subnet
Y - Node in LLRF Subnet for Injector

14. Physical Hardware 2 x Cisco 6509 (MCC) Stackable; rear panel cabling
allows 32 Gb/sec Interconnect
36 x Cisco 3750

15. Schedule
This was a first attempt given known dates

16. Schedule (v2)

17. Network Overview