1. Campus Case Studies in Implementing Advanced Services Cas D’Angelo Cas.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 SoX Internet 1 PeachNet ATM OC-12 Gigabit Ethernet Backbone (other campus routers) Gateway 1 Router Gateway 2 Router

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 Beacon http://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 Manager Georgia Institute of Technology Office of Information Technology Cas.DAngelo@oit.gatech.edu http://bart.ns.gatech.edu/cw