If you want to use VLANs and
trunks, you need to con?¬?gure them on the switches throughout the network. The steps you
use to con?¬?gure and verify VLANs on a switched network include the following:
?– Determine whether to use VTP. If VTP will be used, enable VTP in server, client, or
transparent mode.
?– Enable trunking on the inter-switch connections.
?– Create the VLANs on a VTP server and have those VLANs propagate to other
switches.
?– Assign switch ports to a VLAN using static or dynamic assignment.
?– Save the VLAN con?¬?guration.
VTP Configuration
When creating VLANs, you must decide whether to use VTP in your network. With VTP,
you can make con?¬?guration changes on one or more switches, and those changes are
automatically communicated to all other switches in the same VTP domain.
Default VTP con?¬?guration values depend on the switch model and the software version.
The default values for Cisco Catalyst switches are as follows:
802.1Q
Trunk
802.1Q
Trunk
802.1Q
Trunk
802.1Q
Trunk
VLAN 1
VLAN 2
Host X
VLAN 3 Broadcast Traffic Pruned
VLAN 1 VLAN 2
VLAN 3 Broadcast Traffic Switch 5
Switch 1 Switch 2 Switch 3 Switch 4
VLAN 3
VLAN 3
Implementing VLANs and Trunks 31
?– VTP domain name: Null
?– VTP mode: Server
?– VTP password: None
?– VTP pruning: Enabled/Disabled (OS version speci?¬?c)
?– VTP version: Version 1
The VTP domain name can be speci?¬?ed or learned.
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