Concept Guide

Implementation Information..........................................................................................................................................784
Fault Recovery............................................................................................................................................................... 784
Setting the RMON Alarm........................................................................................................................................785
Conguring an RMON Event................................................................................................................................. 785
Conguring RMON Collection Statistics...............................................................................................................786
Conguring the RMON Collection History........................................................................................................... 786
43 Rapid Spanning Tree Protocol (RSTP)..................................................................................................... 788
Protocol Overview......................................................................................................................................................... 788
Conguring Rapid Spanning Tree.................................................................................................................................788
Related Conguration Tasks................................................................................................................................... 788
Important Points to Remember....................................................................................................................................788
RSTP and VLT..........................................................................................................................................................789
Conguring Interfaces for Layer 2 Mode....................................................................................................................789
Enabling Rapid Spanning Tree Protocol Globally........................................................................................................790
Adding and Removing Interfaces................................................................................................................................. 792
Modifying Global Parameters....................................................................................................................................... 792
Enabling SNMP Traps for Root Elections and Topology Changes.....................................................................794
Modifying Interface Parameters...................................................................................................................................794
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................794
Inuencing RSTP Root Selection.................................................................................................................................794
Conguring an EdgePort.............................................................................................................................................. 795
Conguring Fast Hellos for Link State Detection...................................................................................................... 796
44 Software-Dened Networking (SDN)...................................................................................................... 797
45 Security................................................................................................................................................... 798
AAA Accounting.............................................................................................................................................................798
Conguration Task List for AAA Accounting........................................................................................................ 798
AAA Authentication.......................................................................................................................................................800
Conguration Task List for AAA Authentication...................................................................................................801
Obscuring Passwords and Keys...................................................................................................................................804
AAA Authorization.........................................................................................................................................................804
Privilege Levels Overview.......................................................................................................................................804
Conguration Task List for Privilege Levels..........................................................................................................805
RADIUS...........................................................................................................................................................................809
RADIUS Authentication.......................................................................................................................................... 809
Conguration Task List for RADIUS....................................................................................................................... 810
Support for Change of Authorization and Disconnect Messages packets....................................................... 814
TACACS+........................................................................................................................................................................825
Conguration Task List for TACACS+................................................................................................................... 825
TACACS+ Remote Authentication.........................................................................................................................827
Command Authorization.........................................................................................................................................828
Protection from TCP Tiny and Overlapping Fragment Attacks............................................................................... 828
Enabling SCP and SSH................................................................................................................................................. 828
Using SCP with SSH to Copy a Software Image................................................................................................ 829
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