VLANs are created on Layer 2 switches to control broadcasts and enforce the use of a Layer 3 device for communications.Each VLAN is created in the local switch's database for use.Hi it's my first time that im trying to configure a switch so im not so good right now with it Im trying to add a switch cisco catalyst 3560G to my network I read this page set the switch as a VTP Client.I entered the mode (client), the domain and password. If i use the command "show vtp status" on the new switch this is what i get VTP Version : 2 Configuration Revision : 3 Maximum VLANs supported locally : 1005 Number of existing VLANs : 7 VTP Operating Mode : Client VTP Domain Name : [email protected] VTP Pruning Mode : Enabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0x B1 0x96 0x D1 0x22 0x84 0x44 0x76 0x6B Configuration last modified by 192.1 at 3-1-93 If i do the command on my switch that is the server, this is what i get VTP Version : running VTP1 (VTP2 capable) Configuration Revision : 59 Maximum VLANs supported locally : 1005 Number of existing VLANs : 23 VTP Operating Mode : Server VTP Domain Name : [email protected] VTP Pruning Mode : Enabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0x C7 0x60 0x7B 0x B2 0x D7 0x41 0x69 0x E8 Configuration last modified by 192.168.10.1 at 12-6-07 Local updater ID is 192.168.10.1 on interface Vl10 (lowest numbered VLAN interface found) Is there something else i need to do ? VLANs are created using the set vlan command for COS devices or with the vlan command in vlan database mode for IOS switches.For Ethernet VLANs, you can also configure the standard parameters in Table 6-1.Many options are valid only for FDDI and Token Ring VLANs.Some of the items configured deal with options, such as private VLANs, which are discussed in other sections in this book.
When you create a VLAN, you have many options to consider.
This chapter discusses trunking in more detail in later sections.
Each VLAN on the switches implements address learning, forwarding, and filtering decisions and loop-avoidance mechanisms, just as though the VLAN were a separate physical switch.
If a VLAN is not known to a switch, that switch cannot transfer traffic across any of its ports for that VLAN.
VLANs are created by number, and there are two ranges of usable VLAN numbers (normal range 11000 and extended range 10254096).
The invention of VLANs was very much welcomed by all engineers and administrators, allowing them to extend, redesign and segment their existing network with minimal costs, while at the same time making it more secure, faster and reliable!