Reference Guide

Recovering from a Forgotten Password on the S4820T System......................................................78
Recovering from a Forgotten Enable Password on the S4820T.................................................79
Recovering from a Failed Start on the S4820T System.....................................................................80
Restoring the Factory Default Settings.............................................................................................. 80
S4820TMXL Switch....................................................................................................................... 80
Important Points to Remember................................................................................................... 80
5 802.1ag......................................................................................................................82
Ethernet CFM...................................................................................................................................... 82
Maintenance Domains........................................................................................................................83
Maintenance Points.............................................................................................................................83
Maintenance End Points.....................................................................................................................84
Implementation Information.............................................................................................................. 85
Configuring the CFM.......................................................................................................................... 85
Related Configuration Tasks.........................................................................................................85
Enabling Ethernet CFM....................................................................................................................... 85
Creating a Maintenance Domain....................................................................................................... 86
Creating a Maintenance Association..................................................................................................86
Create Maintenance Points................................................................................................................ 86
Creating a Maintenance End Point...............................................................................................87
Creating a Maintenance Intermediate Point................................................................................ 87
Displaying the MP Databases........................................................................................................88
Continuity Check Messages............................................................................................................... 89
Enabling CCM............................................................................................................................... 90
Enabling Cross-Checking.............................................................................................................90
Sending Loopback Messages and Responses................................................................................... 90
Sending Linktrace Messages and Responses..................................................................................... 91
Caching Link Trace........................................................................................................................91
Enabling CFM SNMP Traps................................................................................................................. 92
Displaying Ethernet CFM Statistics.....................................................................................................94
6 802.1X........................................................................................................................95
The Port-Authentication Process.......................................................................................................96
EAP over RADIUS...........................................................................................................................98
Configuring 802.1X............................................................................................................................. 98
Related Configuration Tasks.........................................................................................................98
Important Points to Remember......................................................................................................... 99
Enabling 802.1X................................................................................................................................ 100
Configuring Request Identity Re-Transmissions..............................................................................101
Configuring a Quiet Period after a Failed Authentication......................................................... 102
Forcibly Authorizing or Unauthorizing a Port..................................................................................103
Re-Authenticating a Port..................................................................................................................104