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Campus Case Studies in Implementing Advanced Services Cas D’Angelo Cas.DAngelo@oit.gatech

Campus Case Studies in Implementing Advanced Services Cas D’Angelo Cas.DAngelo@oit.gatech.edu. Preparing for Advanced Services. Gigabit ethernet migration Gateway routers Performance testing TCP tuning Multicast Security. Gigabit ethernet migration. Georgia Tech has installed 100+ ELANS

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Campus Case Studies in Implementing Advanced Services Cas D’Angelo Cas.DAngelo@oit.gatech

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  1. Campus Case Studies in Implementing Advanced ServicesCas D’AngeloCas.DAngelo@oit.gatech.edu

  2. Preparing for Advanced Services • Gigabit ethernet migration • Gateway routers • Performance testing TCP tuning • Multicast • Security

  3. Gigabit ethernet migration • Georgia Tech has installed 100+ ELANS • Implemented as a standards based VLAN • New standards such as 802.1q now available

  4. Gigabit ethernet migration • Gigabit ethernet - supports large MTU • Wire speed routing • Trying to go with IP only backbone • Never routed IPX across backbone • Appletalk is the next protocol to be eliminated

  5. Gigabit ethernet migration • Building design moving from ATM attached ethernet switches to Gigabit ethernet attached 10/100 switches

  6. Gateway routers • Redundant routers Internet 1 PeachNet ATM OC-12 ATM OC-12 SoX Gateway 2 Router Gateway 1 Router Gigabit Ethernet Gigabit Ethernet Backbone (other campus routers)

  7. Gateway routers • OSPF load balancing for backbone • Packets alternate between routers • Both advertise default route originate

  8. Gateway routers • BGP used to control ISP traffic • Prefer SoX routes • AS padding for Internet 1 traffic • Arrangement with SoX to support large MTU

  9. Performance testing - TCP tuning • Iperf: http://dast.nlanr.net/Projects/Iperf/ Tools for experimenting with bandwidth throughput and adjusting TCP window sizes • Nettest: http://www-itg.lbl.gov/nettest/ A secure, real-time network monitoring framework which includes Iperf

  10. Performance testing - TCP tuning • Autobuf: http://dast.nlanr.net/Features/Autobuf_v1.0/An auto tuning-enabled FTP client and server

  11. Multicast • Vendors still working out problems • Multivendor interoperability leaves finger pointing problems • Within last few months have fought with mbgp community issue • Great tool: Access Grid + Multicast Beaconhttp://dast.nlanr.net/Projects/Beacon/

  12. Security • Border data - Tracking flows at egress to campus • Research machines are target for DOS, must be made secure • Firewalls are being installed to ease system administration and for contracts

  13. Questions • Cas D’Angelo, Network ManagerGeorgia Institute of TechnologyOffice of Information TechnologyCas.DAngelo@oit.gatech.edu • http://bart.ns.gatech.edu/cw

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