2.4 Configure, verify, and troubleshoot VLANs (normal/extended range) spanning multiple switches

 

2.4.a Access ports (data and voice)

Screenshot_2018-05-05_22-33-53
We will configure VLANs in the normal range (1-1005) and the extended range (1006-4094).
For PC1 and PC2 to communicate only L2 connectivity is needed as they are on the same VLAN.
The steps are as follows:
1.) Configure PC1 and PC2 to be on access ports and assign the voice and access VLANs

interface Ethernet0/0
 switchport mode access
 switchport access vlan 1006
 switchport voice vlan 10
!

2.) Configure a trunk port on each switch

interface Ethernet0/1
 switchport trunk encapsulation dot1q
 switchport mode trunk
!

That’s it! As both switches contain the VLANs 1006 and 10 they will forward the traffic between switches seamlessly.

2.4.b Default VLAN

The default VLAN is 1. It cannot be disabled and poses a security risk as a lot of Cisco services run on the default VLAN. It is recommended to set all ports to a different VLAN and to assign a single unused port to VLAN 1.
 

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