1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1...
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![Page 1: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/1.jpg)
1© 2003, Cisco Systems, Inc. All rights reserved.
Computer Networks 6 Troubleshooting
Layer 1
Halmstad University
Olga Torstensson
035-167575 [email protected]
![Page 2: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/2.jpg)
222© 2003, Cisco Systems, Inc. All rights reserved.
Upper Layer Components
![Page 3: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/3.jpg)
333© 2003, Cisco Systems, Inc. All rights reserved.
Upper Layer Components
![Page 4: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/4.jpg)
444© 2003, Cisco Systems, Inc. All rights reserved.
Equipment Indicator
![Page 5: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/5.jpg)
555© 2003, Cisco Systems, Inc. All rights reserved.
Power Failures
![Page 6: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/6.jpg)
666© 2003, Cisco Systems, Inc. All rights reserved.
Interface Status
![Page 7: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/7.jpg)
777© 2003, Cisco Systems, Inc. All rights reserved.
Interface Status
![Page 8: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/8.jpg)
888© 2003, Cisco Systems, Inc. All rights reserved.
Poor Network Performance
• Exceeding the design limits of the media
• Large collision domains in shared media networks such as CSMA/CD Ethernet
• Electromagnetic Interference (EMI) effects
• Faulty media or hardware
![Page 9: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/9.jpg)
999© 2003, Cisco Systems, Inc. All rights reserved.
Noise
![Page 10: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/10.jpg)
101010© 2003, Cisco Systems, Inc. All rights reserved.
Slow or Poor Performance
![Page 11: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/11.jpg)
111111© 2003, Cisco Systems, Inc. All rights reserved.
Congestion
![Page 12: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/12.jpg)
121212© 2003, Cisco Systems, Inc. All rights reserved.
Faulty NIC
![Page 13: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/13.jpg)
131313© 2003, Cisco Systems, Inc. All rights reserved.
Collisions
![Page 14: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/14.jpg)
141414© 2003, Cisco Systems, Inc. All rights reserved.
Configuration Errors
![Page 15: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/15.jpg)
151515© 2003, Cisco Systems, Inc. All rights reserved.
Network Testing Tools
![Page 16: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/16.jpg)
161616© 2003, Cisco Systems, Inc. All rights reserved.
Interface Configuration Error
![Page 17: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/17.jpg)
171717© 2003, Cisco Systems, Inc. All rights reserved.
Physical Layer Methodology
![Page 18: 1 © 2003, Cisco Systems, Inc. All rights reserved. Computer Networks 6 Troubleshooting Layer 1 Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.seolga.torstensson@ide.hh.se.](https://reader036.fdocuments.in/reader036/viewer/2022062300/56649d7a5503460f94a5e9c5/html5/thumbnails/18.jpg)
181818© 2003, Cisco Systems, Inc. All rights reserved.
IOS Commands
• interface is down, line protocol is down
• interface is up, line protocol is down