300-115 4/22 题库 Question 246
QUESTION 246Which command enables PortFast and disables port channel on a physical interface?
A. switchport host
B. switchport mode access
C. spanning-tree portfast
D. switchport mode dynamic auto
Correct Answer: C
答案C是不是不全面？C只是Enable Portfast，但是没有Disable port channel；所以真确答案应该是 A ？
https://community.cisco.com/t5/switching/switchport-host-command/td-p/2957169
“his MACRO does 3 things.
1. switchport mode access2. spanning-tree portfast3. disables port-channeling.”
我找了两个资料，觉得也应该选A；
1. N5K的命令介绍
An access host port handles the Spanning Tree Protocol (STP) like an edge port and immediately moves to the forwarding state without passing through the blocking and learning states.
Configuring an interface as an access host port also disables EtherChannel on that interface.
switchport host
2. cisco_nexus7000_interfaces_command_ref的手册中的S commands
Entering the switchport host command on an interface:
• Makes the Layer 2 interface an access port.
• Makes the Layer 2 interface an STP edge port, which decreases the time that it takes to start up packet
forwarding.
• Disables port channeling on this interface
C:\Users\Administrator\Desktop\Snipaste_2019-05-27_12-11-35
S commands
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