vi
4.5.3 RADIUS ................................................................... 35
4.5.4 Port Security ............................................................ 35
4.6 QoS .........................................................................39
4.6.1 Trust State ............................................................... 39
4.6.2 Mapping ................................................................... 39
4.6.3 Priority Override ....................................................... 40
4.6.4 CoS ......................................................................... 41
4.7 Cable Diagnosis .......................................................42
4.8 Statistics Chart ........................................................42
4
.8.1 Traffic Comparison
.................................................. 42
4.8.2 Error Group ............................................................. 43
4.8.3 Historical Data ......................................................... 43
4
.9 Save Configuration
..................................................43
5 IP Addresses, Network Masks & Subnets .......44
5.1 IP Addresses ............................................................44
5.1.1 Structure of an IP address ....................................... 44
5.1.2 Network classes ...................................................... 45
5.2 Subnet masks ..........................................................46
6 Troubleshooting ..................................................47
6.1 Diagnosing problems using IP utilities ......................47
6.1.1 ping .......................................................................... 47
6.1.2 nslookup .................................................................. 48
6
.2 Simple fixes
.............................................................49
6.3 Files upload and download procedure .....................51
6.3.1 Upload
firmware by FTP
.......................................... 52
6
.3.2 Upload auto-config by FTP
..................................... 51
6
.3.3 Backup system configurations by FTP
.................... 52
6
.3.4 Restore system configurations by FTP
................... 53
7 Glossary ..............................................................54
