Embed Size (px)
Citation preview
City College of San FranciscoTechnology Overview
• Information Technology Environment:– 5,000 Desktop Computers– 200 Switches and Routers– Wireless LAN Access on Multiple Campuses– Alcatel Voice over IP Telephone System, Approximately 2,000 Phones– PictureTel VideoConferencing Systems Using Video over IP – 100Mbps Internet Access– 1000Mbps Internet2 Access– Fiber-Based Metro Area Network
• Seven Campuses Currently Connected• Two Additional Pending Construction (Mission, Chinatown)• 1000Mbps Shared Intercampus Network• Additional Capacity Available for Future Growth
• Metro Area Network Goals:– Connect All Major Campuses With Fiber-Optic Infrastructure– Provide Scalability for Future Growth with Easily Maintained Components– Ensure Compatibility with Other Colleges and Universities
• Completed Feasibility Study in 2002
• Hired Optical Networking Consultant in 2003: Photisis Consulting
• Selected Core Technology: Gigabit Ethernet
• Documented Existing San Francisco Commercial Fiber Plant
• Issued Commercial RFP for Fiber Installation and Lease
• Determined Municipal Partnership was a Preferred Solution
• Established Fiber Routing and Technical Criteria
• Received Funding Approval from Board of Trustees ($3.5M)
– See www.ccsf.edu/board Then Archives:June 2004:Resolution B11
• Finalized Partnership Contract with City & County of San Francisco
– Department of Telecommunications and Information Services (DTIS)
Metro Area Network Initiative
• CENIC: Corporation for Education Network Initiatives in California
• A Not-For-Profit Corporation Serving:
– University of California (9 Campuses)
– California State University (23 Campuses)
– California Community Colleges (109 Campuses)
– Cal Tech, USC, Stanford
– Statewide K-12 System
• Coordinate Development, Deployment and Operation of Network Services
– See www.cenic.org
– Then Network:Network Operations:Usage Graphs:Utilization
• Developed State-Wide Optical Network Architecture
• Provided a Model for City College Network Architecture
• Presented Honorable Mention Award to City College in 2003
City College &CENIC Partnership
City College Internet Usage Graph
200 Paul
Metro Area Network - Physical Fiber Path
Production Ring Design
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
Strands 1,2 IN Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 OUT Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN Strands 1,2 OUT
GoughEnet Switch
John AdamsEnet Switch
AlemanyEnet Switch
DowntownEnet Switch
EvansEnet Switch
SoutheastEnet Switch
OceanEnet Switch
CoreSwitch
Infrastructure
Production Ring – Projected Optical Link Loss
FiberPatchPanel
FiberPatchPanel
Fiber PatchPanel
FiberPatch Panel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
Strands 1,2 IN Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 OUT Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN Strands 1,2 OUT
GoughEnet Switch
John AdamsEnet Switch
AlemanyEnet Switch
DowntownEnet Switch
EvansEnet Switch
SoutheastEnet Switch
Ocean Enet Switch
Core Switch
Infrastructure
3.3 dB
10.8 dB
3.9 dB
6.5 dB
6.1 dB
3.6 dB
3.2 dB
Note:LX Optical Budget: 12 dBLH Optical Budget: 23 dB
51,000'
5,000'
38,000'
8,000'12,000'
8,000'
36,000'
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
Strands 1,2 IN Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 OUT Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN Strands 1,2 OUT
GoughEnet Switch
John AdamsEnet Switch
AlemanyEnet Switch
DowntownEnet Switch
EvansEnet Switch
SoutheastEnet Switch
OceanEnet Switch
CoreSwitch
Infrastructure
Strands 3,4 IN
Strands 3,4 OUT
Strands 1,2 IN Strands 1,2 OUT
200 PaulEnet Switch
Internet Ring Design
Internet Ring – Projected Optical Link Loss
FiberPatchPanel
FiberPatchPanel
Fiber PatchPanel
FiberPatch Panel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
FiberPatchPanel
Strands 1,2 IN Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 IN
Strands 1,2 OUT Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN
Strands 1,2 OUT
Strands 1,2 IN Strands 1,2 OUT
GoughEnet Switch
John AdamsEnet Switch
AlemanyEnet Switch
DowntownEnet Switch
EvansEnet Switch
SoutheastEnet Switch
Ocean Enet Switch
Core Switch
Infrastructure
Strands 3,4 IN
Strands 3,4 OUT
Strands 1,2 IN Strands 1,2 OUT
200 PaulEnet Switch
Note:LX Optical Budget: 12 dBLH Optical Budget: 23 dBVLH Optical Budget: 32 dB
6.4 dB 28.7 dB35,000' 123,000'
Ethernet Equipment Details
HP ProCurve Switch xl Mini-GBIC Module
HP ProCurve Gigabit-LX-LC Mini-GBIC
HP ProCurve Networking Switch 5304xl
Ethernet Equipment Parts List
Component Part Number
Quantity Cost
ProCurve Switch 5304xl J4850A 8 $9,328
ProCurve Mini-GBIC Module J4878A 19 $14,383
ProCurve SX Mini-GBIC J4858A 44 $12,276
ProCurve LX Mini-GBIC J4859A 20 $12,340
ProCurve LH Mini-GBIC J4860A 2 $6,648
Total Estimated Cost $54,975
• Transport Internet Access to/from CENIC Communications Hub • Carry Internal Voice-over-IP Telephone Traffic Between Campuses• Enable Distance Learning Between Campuses and Colleges• Provide Video-on-Demand Services to Classrooms• Provide Increased Bandwidth for Online Courses• Enable Scalability to Meet Future Communication Needs• Provide Predictability and Control Over Cost of Communication Services• Maintain Infrastructure With Existing Engineering Staff and Skill Sets• Achieve Significant Cost Savings Versus Leased Services
– Approximately $1 Million Over 20-Year Period
Metro Area NetworkApplications & Benefits
• Provide Hands-On Learning Environment For Computer Networking Department– Dedicate Fiber Strands for Student Experimentation and Testing
• Expand Cisco Academy to Include Optical Networking• Provide Metro-Area Connectivity to Local Non-Profit Organizations• Provide Test Environment for Communications Equipment Vendors• Provide Test Environment for Metro Area Service Providers• Apply Techniques and Procedures Developed by National LambdaRail• Apply Standards Developed by Metro Ethernet Forum (MEF)• Distribute Project Findings and Test Results via Forums Such as IEEE
– “A Cooperative Academic and Municipal Metro Area Network” April, 2004• References:
– “Metro Ethernet” by Sam Halabi, Cisco Press– “Ethernet-Based Metro Area Networks” by Daniel Minoli, McGraw-Hill
Metro Area NetworkAcademic & Industry Cooperation
Metro Area NetworkLayer 2 Operational Details
• Ring Design Implies Redundant Data Paths
• Spanning-Tree Protocol Prevents Data Loops, Establishes One Active Path– Spanning-Tree Protocol (IEEE 802.1D) Restoration Time = 45 Seconds – Rapid Spanning Tree Protocol (IEEE 802.1w) Restoration Time = 1 Second– Port States = Forwarding, Blocking, Listening, Learning
• Ocean Campus Switch Designated as Root Bridge
• Alemany Campus Switch Has Highest Path Cost, Port A2 in Blocking State
• Testing to Date: Ring Restoration Time Approximately 1 to 2 Seconds– Data IP Sessions Remained Active, No Noticeable Impact– Some Voice Sessions Dropped, No Obvious Pattern– Additional Tuning and Testing Required to Retain all Voice/Data Sessions
ALE11R1H5# sho span
Rapid Spanning Tree (RSTP) Information
STP Enabled : Yes Force Version : RSTP-operation
Switch Priority : 32768 Hello Time : 2 Max Age : 20 Forward Delay : 15
Topology Change Count : 676 Time Since Last Change : 19 days
Root MAC Address : 000f20-ef5e00 Root Path Cost : 80000 Root Port : A1 Root Priority : 4096
Port Type Cost Priority State | Designated Bridge ---- --------- --------- -------- ---------- + ----------------- A1 1000LX 20000 128 Forwarding | 000f20-ef2700 A2 1000LX 20000 128 Blocking | 000f20-ef4600 A3 1000SX 20000 128 Disabled | A4 1000SX 20000 128 Disabled | B1 1000SX 20000 128 Forwarding | 000f20-ef2300 B2 1000SX 20000 128 Forwarding | 000f20-ef2300 B3 1000SX 20000 128 Forwarding | 000f20-ef2300 B4 1000SX 2000000 128 Disabled |
Metro Area NetworkSpanning-Tree Example
