Ccna routing and Switching Complete Study Guide

VLAN Troubleshooting Scenario

A manager calls and says they can’t communicate to the new sales team member that just 

connected to the network. How would you proceed to solve this issue? Well, because the 

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Troubleshooting VLAN Connectivity 

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sales hosts are in VLAN 10, we’ll begin with step 1 and verify that our databases on both 

switches are correct.

First, I’ll use the 

show vlan

 or 

show vlan brief

 command to check if the expected 

VLAN is actually in the database. Here’s a look at the VLAN database on S1:

S1#

sh vlan

 

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Gi0/3, Gi0/4, Gi0/5, Gi0/6

                                                Gi0/7, Gi0/8, Gi0/9, Gi0/10

                                                Gi0/11, Gi0/12, Gi0/13, Gi0/14

                                                Gi0/15, Gi0/16, Gi0/17, Gi0/18

                                                Gi0/19, Gi0/20, Gi0/21, Gi0/22

                                                Gi0/23, Gi0/24, Gi0/25, Gi0/26

                                                Gi0/27, Gi0/28