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EVLA Monitor and Control

This document outlines the requirements for the EVLA Monitor and Control (M&C) Network hardware, including connectivity, performance, accessibility, security, configuration, and costs. It provides details on modules, antennas, range, test ports, Ethernet switches, air quality, temperature control, and more.

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EVLA Monitor and Control

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  1. EVLA Monitor and Control M&C Network EVLA M&C Hardware CDR October 20, 2004

  2. Requirements • Connectivity • Performance (Predictability) • Accessibility • Security • Configuration • Costs EVLA M&C Hardware CDR October 20, 2004

  3. Connectivity • 40+ modules\antenna • 28 antennas • 22Km range • Test port(s) • Antenna Ethernet switches should be in vertex room • Air quality • Temperature control EVLA M&C Hardware CDR October 20, 2004

  4. Performance (Predictability) • No collision domain • No retransmits barring fiber error • 3 million packets/sec/switch • 100Mbit dedicated to each module • Latency • Through Fiber ~10 us/3Km • Through switches ~20-30 us • 60-90us aggregate through switches EVLA M&C Hardware CDR October 20, 2004

  5. Performance • Antenna state change in < 100 us • > 100 us elapsed time to most antennas • Some buffering must be done on fast switching MIBs EVLA M&C Hardware CDR October 20, 2004

  6. Accessibility • Direct Monitoring • From Antenna, test ports • From Monitor & Control Network • Proxied Monitoring • From remote NRAO locations • AOC systems • GB, CV, etc • From non-NRAO locations via VPN system • Multicast Monitor data to VLA/AOC networks EVLA M&C Hardware CDR October 20, 2004

  7. Security • No direct remote access • Private address range 10.80.x.y • Proxied access is controlled via access lists • Control access at all routers • Block all access, then mask in what’s needed • Intrusion detection • Mechanisms for detecting access • Egress filtering/logging • M&C system monitoring EVLA M&C Hardware CDR October 20, 2004

  8. Configuration • Class C per antenna • Part of non-routable network class B • 10.80.xxx.yyy • IPv4 and IPv6 support in all devices • ICMP support at MIBs • Multicast capability in all routers/switches/MIBS • From MIB to M&C and AOC networks • Time synchronization EVLA M&C Hardware CDR October 20, 2004

  9. Costs • ~$660K total from Control Building to all 28 antennas at current costs • Cost Drivers • 22Km drives costs • 48 100mbit fiber ports • 2 Gbit long haul interfaces/antenna • Buy as late as possible EVLA M&C Hardware CDR October 20, 2004

  10. Funding • $90K at control building • From WBS 6.10.10 • $323K for antennas • From WBS 6.10.10 • $270K removed to balance budget 1/11/02 • Currently $413K is budgeted through 2010 • Cost reduction through 2010 should cover shortfall EVLA M&C Hardware CDR October 20, 2004

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