1 / 32

SUNet the Stanford University Network

Brief history of SUNet evolution, design parameters, network components, statistics, next generation requirements, N-dimensional mesh network, SUNet cube backbone layout. Proposals for ATM backbones. User router connections in the cube. Organization and user router classifications.

stevemitchell
Download Presentation

SUNet the Stanford University Network

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SUNet the Stanford University Network Presentation for the Internet2 Campus Networking Workshop

  2. A brief history of SUNet • Originally a research project of EE, CS and Medical grad students • Networking staff assembled in 1983 • Centrally funded since 1984 • Cable plant project in 1985 • Responsible for operations since 1986

  3. Backbone technology evolution • 3Mb ethernet from Xerox PARC ~ 1979 • Large bridged ethernet - DEC bridges 1986 • Campuswide FDDI ring 1990 • Multiple FDDI rings from Cisco 7513 1995 • Initial fiber install in 1985 - 12 MM • Latest trunks: 96 MM/48 SM

  4. In-building wiring • Complete spectrum down to 3-pair RJ-11 • New buildings get at least 2 Cat-5 network jacks along with 2 Cat-3 phone wires • Centrally funded wiring improvement project - recently approved - requires matching departmental investment in activation

  5. SUNet design parameters • TCP/IP only supported backbone protocol • Appletalk is tunneled with Fastpaths • Medical Center routes IPX/Appletalk • DECNET still on in several routers • Networking supports to building entrance • Local Network Administrators in buildings • Network consultants assist LNAs

  6. Network components • 49 routers from Cisco • 3 7513, 2 7507, 6 7000, 4 7206, 5 4700 • 7 2501, 1 2514, 1 3000 • and still 9 AGS+, 10 AGS, 1 CGS • FDDI concentrators from DEC • FastEthernet switches: Catalyst 5000/5500 • ATM switches: LS1010

  7. SUNet statistics 970914 • From NetDB, the network database • Generates DNS and BootP tables • 442 subnets defined, 342 active • 327 physical subnets • 240 main campus, 87 Medical Center • 33866 hosts, 35445 addresses • 24749 campus hosts, 9117 Medical Center

  8. BBN Planet (and beyond….) UCnet SUNet DMZ ACE workstations ACE/AFS servers Core Cisco 7513 Student ACE AFS Engineering Med Admin servers General MedNet GSB GSB

  9. CERAS AGS+ Res 4700 Res-West 4700 Res-South 4700 Res-Central AGS+ Sweet 7507 Jenkins AGS+ SUNet Backboneas of early 1997 Gates 1 7000 Gates 2 7000 CIS AGS+ SUNet 7000 BBN Planet DMZ 4700 Varian AGS+ DMZ FDDI AFS/DCE Servers InfoSci AGS+ Med 7206 CORE ACE Servers Med Center 7513 FDDI GSB-DMZ 4700 FDDI MedNet AGS+ FDDI FDDI GSB-DMZ 4700 NCS 7000 Encina AGS+ Quad 7206 Press 7000 Pine 7507

  10. Next generation requirements • Migration from Mainframe to distributed computing model for Admin systems • Choice of DCE as standard platform • Higher bandwidth for image transfer, etc • Increased reliability as well as capacity

  11. Next Generation choices • ATM seemed likely even 18 months ago • New routers were ordered with ATM • New Computer Science building provided early implementation experience for both LANE and FastEthernet VLAN trunking • Sought advice from Cisco Consulting Engineers

  12. Proposed ATM backbones ATM switch ATM switch ATM switch ATM switch ATM switch ATM switch ATM switch ATM switch

  13. Concerns with ATM design • Redundancy vs. Interface expense • Total throughput • Staff education on a new technology

  14. N-dimensional mesh network • Proposed by Cisco’s Roger Beeman • Designed to have well defined expansion • Multiple paths provide aggregate capacity • Significant redundancy makes individual components less critical • Networks on corners • 2-way routers on edges or 4-way routers on faces

  15. 4-way connected routers on faces • 3-D (cube) : 8 networks, 6 routers • 4-D (hypercube): 16 networks, 24 routers • 5-D: 32 networks, 80 routers

  16. The SUNet choice - a cube • Attracted by the combination of redundancy and expandable capacity • Have purchased 6 7513s with 4-VIP2s with 100FX port adapter each • Have purchased 4 Catalyst 5000s with 2 12x100FX boards, each will be two corners (using VLANs)

  17. SUNet cube backbone layout and addressing Pine Forsythe Sweet Press .3 0 2 4 6 .35 .97 .98 .2 .33 .65 .99 .34 .66 .35 .1 .33 5 3 .2 .67 .51 .115 .3 .98 1 2 .114 .19 .49 .65 .97 4 .83 6 .18 .17 .81 .82 .18 .50 .113 .83 .82 .49 1 .115 3 5 7 .51 .81 .114

  18. Connections to the cube • User routers connected to at least two corner networks • Server nets directly connected to two backbone routers using HSRP <or> • Server router directly connected to two opposite face backbone routers • Three “hotspots” - ACE servers, Admin servers and Off-campus/Internet

  19. User router choices • Planned to serve multiple networks per router interface using VLANs and Catalysts • Now planning to use router module (RSM) in Catalyst 5500 and feed Catalyst 5000s • Have ordered several to replace remaining AGS+ routers • Will use Catalyst 3200 replacing AGS “departmental routers”

  20. SUNet Cube Backbone User routers R Commercial Internet R Legacy routers FE FE FDDI R R Router to BBN R R FE FE R R FE FE R CalREN-2 Gigapop R FE FE R R User routers

  21. Organization • ITSS - Information Technology Systems and Services • CCS - Computer and Communications Services • Networking Systems - centrally funded • Production Services - Operations/Systems • SUNet Operations

  22. Responsibilities • Backbone routers • End-to-end TCP/IP protocol • Network to the building entrance • Run network servers (DNS, DHCP, etc) • Support network consultants/LNAs

  23. Support profile • Onsite staff - 7am - 11pm Monday-Friday • Weekend - 8 hours/day • On call support 7 by 24 • Off hour trouble calls taken by Computer Operations staff who page on call person

  24. Staffing level • Operations has 5 Network Specialists and 3 Systems Programmers • Systems has 2 SysAdmins, 2 generalists • One network specialist/one sysadmin work the late shift (3pm-11pm)

  25. Multicast • Currently using PIM dense mode • Works in 11.0 AGS routers (if no loops) • Plan to deploy in new backbone • SCPD (SITN) Engineering classes • Library - supplement class videotapes • Conferencing with remote sites

  26. Network monitoring • DEC MSU / Remedy Health Profiler • IBM Netview 6000 • Perl scripts • Ethermeters / RMON

  27. Traffic/usage data • Have been using Cisco’s Netflow Export - looks very promising • Other products being examined

  28. Challenge of Internet2 • More of a co-operative than NSFNET • Trouble ticket generation/responsibility • Service level commitment between members? • Chance to use the technology!

  29. 9/8/97 CSDCF Gates Building Network 21ea. Cisco Catalyst 5000 1000 10BaseT ports, 80 100BaseT ports, 20VLans …. Cisco 5000 …. Cisco 5000 Cisco 5000 To 7 Catalyst 5000 4ea. 100MB connected to C5000 10ea.10MB ether ports connected to C5000 To 21 Catalyst 5000 Cisco LS1010 155MB ATM BBone . . . . . . . . . . ... ... ... ... ... ... Cisco 7513 Router Cisco 5000 100MB Vlan BBone OC3 ATM Campus Backbone FDDI 100

  30. Gates VLAN Connections 9/8/97 CSDCF G Cat-3-1 G Cat-4-1 G Cat-1-1 G Cat-2-1 G Cat-0-4 G Cat-5-1 G Cat-3-4 G Cat-4-4 G Cat-1-4 G Cat-2-4 G Cat-0-2 G Cat-3-2 G Cat-4-2 G Cat-1-2 G Cat-2-2 G Cat-0-1 G Cat-3-3 G Cat-4-3 G Cat-1-3 G Cat-2-3 G Cat-0-3 VLAN 1: 171.64.70.10 - All GCATs VLAN 41: 171.64.64.10 VLAN 3: 171.64.65.10 VLAN 4: 171.64.67.10 VLAN 5/45: 171.64.68.10 VLAN 6: 171.64.71.10 Cisco LS1010 Cisco 7513 Router

  31. Gates VLAN Connections 9/8/97 G Cat-5-1 G Cat-3-1 G Cat-4-1 G Cat-1-1 G Cat-2-1 G Cat-0-4 G Cat-4-4 G Cat-3-4 G Cat-1-4 G Cat-2-4 G Cat-0-2 G Cat-3-2 G Cat-4-2 G Cat-1-2 G Cat-2-2 G Cat-0-1 G Cat-3-3 G Cat-4-3 G Cat-1-3 G Cat-2-3 G Cat-0-3 VLAN 7: 171.64.72.10 171.64.73.10 VLAN 8: 171.64.75.10 VLAN 9: 171.64.76.10 VLAN 11: 171.64.66.10 100MB VLAN 12: 171.64.74.10 100MB VLAN 13 171.64.77.10 100MB Cisco LS1010 Cisco 7513 Router

  32. Gates VLAN Connections 9/8/97 G Cat-3-1 G Cat-4-1 G Cat-1-1 G Cat-2-1 G Cat-0-4 G Cat-5-1 DHCP Public VLAN VLAN 19 Experimental ATM ELAN 30 G Cat-3-4 G Cat-4-4 G Cat-1-4 G Cat-2-4 G Cat-0-2 G Cat-3-2 G Cat-4-2 G Cat-1-2 G Cat-2-2 G Cat-0-1 Vlan 16 Firewall Net(Cheriton) G Cat-3-3 G Cat-4-3 G Cat-1-3 G Cat-2-3 G Cat-0-3 VLAN 17 Mosquito Net(Baker) VLAN 13: 171.64.77.10 VLAN 14/16: 171.64.79.10 100MB VLAN 15: 171.65.XX.XX VLAN 17: 171.64.67.10 VLAN 19: 171.64.70.128 ELAN 30:: 171.64.70.128 ELAN 45: 171.64.68.10 Repeater from Med Center VLAN 15 Cisco LS1010 Cisco 7513 Router

More Related