Click the following links to learn how to create and name vlan and what is vlan trunking protocol. This topic describes the features that vlan trunking protocol vtp offers to support vlans. Set the vtp domain name to lab4 and the vtp password to cisco on all three switches. We need only to create vlan on vtp server and reset will be done by vtp server automatically. Upon receipt of an advertisement request, a vtp device sends a summary advertisement, followed by one or more subset advertisements. Thats a time consuming task so there is something to help us called vtp vlan trunking protocol.
Open a console connection to switch 1 and enter the following ios commands from global configuration mode to configure vlan trunking protocol vtp in switch 1. Vtp client mode a switch using this mode cant change its vlan configuration. This lab will discuss and demonstrate the configuration and verification of transparent vtp and vtp pruning. Figure 101 shows a switched network without vtp pruning enabled. A vlan created on a vtp server switch is automatically advertised to all switches inside the same vtp domain. A switch can be part of one and only one vtp domain and can share vlan information with other switches in the same domain.
In a typical network, some switches are configured as vtp servers and other switches are configured as vtp clients. In order to configure vtp, you only need to specify a domain name and a password. The second section discusses a scenario in which vlans are used, detailing the configuration commands used to meet the scenario requirements. Vtp vlan trunking protocol is a cisco proprietary protocol which allows to propagate vlan database across local area network switching segment. That means that a vtp client switch cannot create or delete vlans. Configure, verify, and troubleshoot intervlan routing. Configure s1 in server mode, s2 in client mode, and s3 in transparent mode. First we will try to enable vtp version 3 on one of our switches. Each switch can use one of four different vtp modes. In the following cisco switch commands cheat sheet, i have tried to include the most important and frequentlyused cli commands that cisco professionals encounter in real world networks. If you configure the switch as vtp transparent, you can create and modify vlans but the changes affect only the individual switch. The catalyst 2948gl3 and catalyst 4908gl3 layer 3 l3 switches do not support several layer 2 l2oriented protocols that are found on other catalyst switches. If you have vtp mode set to transparent like switch 2 is initially then that is stored in the running config. This tutorial explains how to create and assign vlan, vlan membership static and dynamic, router on stick and spanning tree protocol stp in detail with practical examples in packet tracer.
Vlan trunking protocol, or just vtp, is a useful feature for managing vlans across multiple switches. The vlan trunking protocol vtp can manage the addition, deletion, and renaming of vlans from a central server without manual intervention and vlan trunk protocol vtp thus reducing overhead on network administration. Normally you would have to configure each switch separately and create those vlans on each and every switch. Vlans are configured on the vtp server and then replicated to other connected switches, called vtp clients. A vtp domain is simply the collection of switches with the same vtp domain name configured.
Whilst not an exhaustive ios command list it covers the majority of commands found in the exam. How to configure vlan, stp, dtp step by step guide. You can say its more of a replication protocol and instead of a trunking protocol. Cisco icnd2 configure, verify, and troubleshoot rstp operation. The first section of this article focuses on the commands used to configure vlans and their associated parameters. Refer to understanding vlan trunk protocol vtp for more information on vtp. The domain name is now a requirement, it cant be null. Such protocols include vtp, dtp, and port aggregation protocol pagp. Cisco created this protocol to share and synchronize their vlan information throughout the network. Configuring vtp this chapter describes how to configure the vlan tr unking protocol vtp on the catalyst 6500 series. All switches have the same the vtp domain name, unless the network design insists for different vtp domains. Prior to configuring vtp version 3, you must ensure that the spanningtree extend systemid command has been enabled. The most important field listed in the output above is the configuration revision number. Each device tracks the vtp configuration revision number that is.
The command show vtp status is executed before and after the change to show the configuration number being reset. Older cheat sheets may contain additional commands, such as ipx which is no longer in the exam. In cisco ios software global configuration mode, you can configure all vtp parameters with cisco ios software commands. Ps vtp paging station vocia text protocol a control system can connect to the auxiliary port of a. The lsi16 will accept vtp commands for the emergency elements of a vocia system.
This will stop the advertisement of unused vlans to other switches. Vtp replicates configured vlans to all participating switches. How to configure a vtp secondary server cisco community. In this lab you will familiarize yourself with the following commands command. Vtp server vtp servers advertise the vtp domain vlan information to other vtpenabled switches in the same vtp domain. Note for complete syntax and usage information for the commands that are used in this chapter, refer to the catalyst 6500 series switch command reference publication. Vlan trunk protocol vtp is a cisco proprietary protocol used to share vlan configuration across the network. Vlan trunk protocol vtp is a ciscoproprietary protocol used to replicate vlans using layer 2 trunk frames to other switches. Older cheat sheets may contain additional commands, such as ipx which is no longer. What show commands did you use to verify the vtp updates on s1 and s3. The other commands you will want to use in global configuration mode are listed here.
Access ports trunk ports an access port is a member of only a single vlan. The following commands will help with verifying vtp on each switch. The vlan trunking protocol vtp is a very handy protocol to create, manage and maintain a large network with many switches under same physical lan. Configuring vlan trunking protocol vtp free ccna workbook. Access ports are most often used to connect host devices, such as computers and printers. This lab will we used to demonstrate the configuration part of vlan, vtp, dtp, stp and router on. The second command assigns the name servers to this vlan. Users are only able to communicate within the same vlan unless intervlan routing is used. However when it is changed you cannot change it back to null. Switches in different vtp domains do not share vtp information. Vlan trunking protocol, also known as vtp is a technology that allows for the propagation of vlans from a single switch to multiple switches in a serverclient fashion. Main goal of vtp is to manage all configured vlans across the network.
Please note that a lsi16 is required for this vtp functionality in a vocia system. On that same note, vtp can take down your network if youre not very careful. A vlan switch inside a switch is a single broadcast domain. How to setup vlan trunking protocol vtp on cisco switches in our last article about vlans read ore about it on the what is a vlan. Configure vlan trunking protocol vtp on all switches. The command would be vtp pruning under global configuration. Vtp pruning is used in conjecture with vtp to ensure that traffic destined to specific vlans are not passed to switches that do not need it.
The switch has received a vtp summary advertisement with a higher configuration revision than its own. I know that the list is not exhaustive but i believe that the most useful commands are included. Learn how to create and manage vlan in cisco switch step by step. Vtp version 3 is not supported on private vlan pvlan ports.
This number indicates the level of revision for a vtp packet. Without vtp pruning, a switch floods broadcast, multicast, and unknown unicast traffic across all trunk links within a vtp domain even though receiving switches might discard them. Vtp pruning increases the network bandwidth by reducing unnecessary flooded traffic, such as broadcast, multicast, unknown, and flooded unicast packets on trunk links. In this lab, you will be using s1 as the vtp server, with s2 and s3 configured as vtp clients or in vtp transparent mode. Check the current vtp settings on the three switches. Configure vlan trunking protocol vtp in cisco ios switch. How to setup a vlan on a cisco switch article, we learned. Vlan virtual lan and vtp vlan trunking protocol vlan replication protocol.
In particular, the objec tives of this lab are as follows. Configuration to configure an ios based switch to be a vtp server, issue the following commands. Very interesting, i didnt know that vtp configuration is not stored in nvram. This section provides some guidelines for the configuration of vtp in the network. Virtual local area network vlan trunk protocol vtp reduces administration in a switched network. Domain common to all switches participating in vtp. Vlans 7 vtp modes a switch can be configured in one of three modes. Vtp version 2 supports basic vlans 21001 propagation, work with isl protocol, supports authentication with md5 hash. However, received vtp updates are processed and forwarded. Use the show vlan command to confirm that only default vlans exist and that all ports are assigned. The first command creates vlan 100, and enters vlan configuration mode. Common vtp configuration tasks are setting the operating mode, domain, and password. Vlan trunking protocol vtp domain common to all switches participating in vtp. Here we are going to configure switch 1 as vtp server and switch 2 as vtp client.
Use show commands to verify the changes on vtp mode. To display the vtp configuration information, we can use the show vtp status command. These two commands will modify the default options. Configuring intervlan routing objective l create a basic switch configuration and verify it. Vtp domains cisco switches participating in vlan trunking protocol vtp are organized into management domains, or areas with similar vlan requirements. Vlanone broadcast domainone subnet 0 to 4095 available vlans 3.
Essential cisco ios commands internetwork training. Vlan trunking protocol vtp allows a network administrator to automate the management of vlans. After vtp server configuration its time to organize vlan. Confirm configuration changes using the show vtp status command on s1 and s2 to confirm that the vtp mode and domain are configured correctly. There are a couple of different common cisco vtp configuration mistakes and misconceptions. By default on cisco switches, all switch ports are access ports. In this post, i will show steps to configure vlan trunking protocol vtp in cisco ios switch. This section provides some basic commands in order to configure vtp on the most commonly used catalyst switches. Vtp version 1 and version 2 support vlans 1 to only. You make global vlan configuration changes for the domain using either the commandline interface cli or simple network management protocol snmp.
Before you configure vlans, you need to understand the basics of vtp protocol. Vlans can be created in a standalone fashion, or using vlan trunk protocol vtp. Cisco ios software configuration guide, release 12. It is a method to ease administration by selecting a switch to be configured as a vtp server. For example, in figure 1 see also listing 1 for the configuration commands, vlan20 needs to be created on sw1 and sw2 for. Configure the operating mode, domain name, and vtp password on all three switches. Enter configuration mode and use the following commands to enable client mode. So if your vtp domain works correctly, the client switch should have the same vlan database and revision number as the server switch. How to configure vtp in cisco packet tracer youtube. The network administrator has to manually configure vtp version 3 on the switches that need to run vtp version 3. Vlan trunking protocol vtp simplifies creation and management of vlans in network. When you make a change to the vlan configuration on a vtp server, the change is propagated to all switches in the vtp domain. Vlan trunking protocol vlan trunking protocol vtp is a cisco layer 2 messaging protocol that manages the addition, deletion, and renaming of vlans on a networkwide basis. Server mode is the default vtp mode for most catalyst switches.
804 90 546 898 121 285 14 950 1442 1414 1465 728 101 137 1219 748 1295 1057 498 541 965 723 1469 1242 863 553 1344 284 87 253 427 1139 452 922 1226 774 746 76 30 1315 166 1093 1212 303 904 1249 1235