200-301 answers

200-301 answers.-default portStarting at the top, in this show etherchannelsummary command, the D code letter indicates that the channel itself is deactivated, and the S indicates that the channel is a Layer 2 Ethernet channel. The code I indicates that the physical interface is working independently of the PortChannel (described as "stand-alone"). The PortChannel (Pol) is highlighted at the bottom of the command output because the Layer 2 Ethernet channel is in a deactivated state (SD), where F0/14 and F0/15 are used as standalone interfaces (I).Interestingly, because the problem stems from a configuration error, the two physical interfaces continue to operate independently as if the port channels did not exist1 Pol (SD): PAgPSame. The last command in the example shows the two physical interfaces in a connected state when the port channel 1 interface is deactivated. Tip: Here is a suggestion for solving Ethernet channel problems on the exam. instead of spending time remembering the incorrect options, you should focus on the correct configuration options columnSW1# show interfacesstatus |include Po|14|15Table. Then find the difference between the configuration for the particular problem and the known correct configuration and work from there.Configuration checks performed before adding an interface to an Ethernet channel can cause problems even when the channel-group command is configured correctly and other configuration settings are in place. The final one in this chapter46 Chapter 2 Configuring Spanning Tree Protocol (STP)topic will examine these configuration settings and the impact they have.