CCNA LAB12: 配置Disabling Auto-negotiation of Trunking

小乔

Lab Objective:
The objective of this lab exercise is for you to learn and understand how to turn off the auto-negotiation of a trunk link.

Lab Purpose:
Switch interfaces are set to automatically attempt to create a trunk link when connected to another switch. You need to know how to disable this behavior. Note that this behavior varies depending on the switch model.

Certification Level:
This lab is suitable for the CCENT certification exam preparation.

Lab Difficulty:
This lab has a difficulty rating of 5/10.

Readiness Assessment:
When you are ready for your certification exam, you should complete this lab in no more than 15 minutes.

Lab Topology:
Please use the following topology to complete this lab exercise:




Task 1:
In preparation for the configuration, configure a hostname on Sw1 as well as Sw2.

Task 2:
Configure Sw1 so that auto-negotiation of trunking is disabled. Set the port to manually trunk.

Task 3:
Verify your configuration with the appropriate show commands.


Configuration and Verification
Task 1:
For reference information on configuring hostnames, please refer to earlier labs.

Task 2:
Sw1#show interface fast0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)

Sw1(config)#int fast0/1
Sw1(config-if)#switchport nonegotiate
Command rejected: Conflict between ‘nonegotiate’ and ‘dynamic’ status.
Sw1(config-if)#switchport mode trunk
Sw1(config-if)#switchport nonegotiate
Sw1(config-if)#end
Task 3:
NOTE: As you can see above, the interface cannot be left to dynamically become a trunk or access port if you want to disable auto-negotiation of trunking.

Sw1#show int fast0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none


来源: CCNA LAB 8: 配置 Securing VTP Domains
来源: CCNA LAB 9: 配置  Switch Access Port Security
来源: CCNA LAB10: 配置 Advanced Switch Access Port Security
来源: CCNA LAB11: 配置Advanced Static Switch Access Port Security