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Disabling and Enabling Ports ................................................................................................................. 26-9

MAC Locking Defaults ............................................................................................................................ 26-9

MAC Locking Configuration ................................................................................................................. 26-10

TACACS+ ................................................................................................................................................... 26-11

TACACS+ Client Functionality ............................................................................................................. 26-12

Session Authorization and Accounting...........................................................................................26-12

Command Authorization and Accounting .......................................................................................26-12

Configuring the Source Address.....................................................................................................26-13

Default Settings .................................................................................................................................... 26-13

Basic TACACS+ Configuration ............................................................................................................ 26-14

Example TACACS+ Configuration ....................................................................................................... 26-15

TACACS+ Display Commands ............................................................................................................ 26-15

Service ACLs .............................................................................................................................................. 26-16

Restricting Management Access to the Console Port .......................................................................... 26-17

Configuring a Service Access Control List ........................................................................................... 26-17

DHCP Snooping ........................................................................................................................................ 26-18

DHCP Message Processing ................................................................................................................. 26-18

Building and Maintaining the Database ................................................................................................ 26-19

Rate Limiting ........................................................................................................................................ 26-19

Basic Configuration .............................................................................................................................. 26-19

Configuration Notes........................................................................................................................26-20

Default Parameter Values ..............................................................................................................26-20

Managing DHCP Snooping .................................................................................................................. 26-21

Dynamic ARP Inspection ........................................................................................................................... 26-22

Functional Description .......................................................................................................................... 26-22

Static Mappings..............................................................................................................................26-22

Optional ARP Packet Validation .....................................................................................................26-22

Logging Invalid Packets..................................................................................................................26-23

Packet Forwarding..........................................................................................................................26-23

Rate Limiting...................................................................................................................................26-23

Eligible Interfaces ...........................................................................................................................26-23

Interaction with Other Functions.....................................................................................................26-23

Basic Configuration .............................................................................................................................. 26-24

Default Parameter Values ..............................................................................................................26-24

Managing Dynamic ARP Inspection ..................................................................................................... 26-24

Example Configuration ......................................................................................................................... 26-25

Non-Routing Example ....................................................................................................................26-25

Routing Example ............................................................................................................................26-26

Figures

3-1 CLI Startup Screen............................................................................................................................. 3-2

3-2 Sample CLI Defaults Description........................................................................................................ 3-4

3-3 Performing a Keyword Lookup ........................................................................................................... 3-4

3-4 Performing a Partial Keyword Lookup................................................................................................ 3-4

3-5 Scrolling Screen Output...................................................................................................................... 3-5

3-6 Abbreviating a Command................................................................................................................... 3-5

9-1 VLAN Business Scenario ................................................................................................................... 9-2

9-2 Inside the Switch ................................................................................................................................ 9-5

9-3 Example of VLAN Propagation Using GVRP ..................................................................................... 9-8

10-1 Applying Policy to Multiple Users on a Single Port........................................................................... 10-5

10-2 Authenticating Multiple Users With Different Methods on a Single Port........................................... 10-6

10-3 Selecting Authentication Method When Multiple Methods are Validated ......................................... 10-7

10-4 Stackable Fixed Switch Authentication Configuration Example Overview ..................................... 10-25

11-1 LAG Formation ................................................................................................................................. 11-4

11-2 LAGs Moved to Attached State ........................................................................................................ 11-6