Received vtp updates will be processed and forwarded. To configure a switch as a vtp server, use the vtp mode server global configuration command. At least one server is required in a vtp domain to propagate vlan information within the vtp domain. The md5 digest is a 15byte checksum of the vtp configuration. When you configure a new vlan on one vtp server, the vlan is distributed through all switches in the domain. If you didnt want to use vtp for version 1 or 2 then you had to use the transparent mode. When the switch stack is in vtp server or client mode, all switches in the stack carry the same vtp configuration. The default vtp mode on cisco switches is the server mode, so the command vtp mode. This lab will we used to demonstrate the configuration part of vlan, vtp, dtp, stp and router on stick. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your mac, or after your mac. Which answer lists a possible reason why switch sw2, on the other end of the trunk, is not synchronizing its vlan database with switch sw1. Vlan trunking protocol implementing cisco ip switched.
Vtp uses the destination mac address 0ccccccc, which is a reserved multicast address for vtp messages. This mode allows you to make changes and propagate those changes out to all other switches in the domain. Once vtp pruning is enabled, you can optionally configure a prune eligible list if you want to limit the vlans that can be pruned. Switches that are in vtp transparent mode display the vlan and vtp configurations. It can only update its vlan configuration through the vtp messages that it receive from vtp server. Example 416 configures vtp domain ccie with pruning on all eligible ports. Vlan trunking protocol but this is not a purely trunking. Set the vtp domain name to lab4 and the vtp password to cisco on all three switches. Without vtp, you must configure vlans in each device in the network. Vlan trunking protocol vtp modes, server mode, client. A vtp transparent mode is used when a switch is not required to participate in vtp, but only pass the information to other switches.
In this case, the mac address of the stack master is used as the primary server id. A network switch, which is participating in vlan trunking protocol vtp, can have three different modes. Options such as vtp pruning can be configured for all or a range of vlans. However, received vtp updates are processed and forwarded. Basic configuration of vlans, switchports and intervlan routing duration. Vtp client switch cannot change the vlan configurations itself. I have a number of stacked switches at our corporation which are in vtp server client mode, and i would like to change them back to vtp transparent mode, but want to verify that switching to vtp transparent mode, will not affect the current configuration on the switch. Vtp enables you to create the vlan only on a single switch. Now we need to configure sw2 and sw3 as vtp clients. Transparent mode vtp servers can create, modify, or delete vlans and other configuration parameters for the specified vlan domain.
Explain the differences in operation between vtp transparent mode, server mode, and client. If the switch is then powered off, it resets the vtp configuration to the default. This command is executed in global configuration mode and sets the switch as a vtp server. Vtp v3 adds the mode off option which effectively disables vtp. That means that a vtp client switch cannot create or delete vlans. Vtp transparent switches do not participate in vtp. That switch can then propagate information about that vlan. This article describes the configuration of vtp v1 or v2. Vtp version 3 is compatible with version 2, not version 1. Configure the operating mode, domain name, and vtp password on all three switches. The end and the ctrlz commands do not work in this mode. You must use this command if you want to save vtp mode as transparent if the switch resets. The device receiving a vtp message must have a lower configuration revision number than itself output in sh vtp status vtp messages are only sent on trunk links, not access ports. A switch in transparent mode with a higher configuration revision number than the existing vtp server updates all vlan information throughout the vtp domain.
This following is quoted from the cisco 3560 configuration guide. Can receive and forward vtp advertisements, can update vlans locally. Configure s1 in server mode, s2 in client mode, and s3 in transparent mode. A switch in vtp transparent mode only forwards vtp advertisements. Vtp propagation of mst information catalyst switches cisco. The difference between vtp server and transparent mode on. Also, you cannot assign a port on a vtp client to a vlan before the vtp server notifies the client of the new vlan.
You cannot create, change, or delete vlans on a vtp client. When you move a vtp mode of a switch from transparent to server, vlans configured on the vtp. In exec mode, issue this command in order to enter vlan configuration mode. You can use the vtp mode transparent global configuration command to disable vtp on the switch and then to change its vlan information without affecting the other switches in the vtp domain. To reset a configuration revision number, the switch configuration must be saved and the switch reloaded. Vtp advertisement packets are sent to the destination mac address. Lan switching topics ccie routing and switching exam. Server mode client mode transparent mode vlan trunking protocol vtp server mode. By default, vtp pruning mode, v2 mode and traps generation are disabled. The example below demonstrates how to enable vtp pruning on switch.
Note for complete syntax and usage information for the commands. In this part we explained vtp mode with examples including vtp server mode, vtp client mode and vtp transparent mode. This command is executed in privilege exec mode, not config mode. Vtp client mode a switch operating in this mode cant change its vlan configuration. Ill walk you through each of those and show you how to configure vtp version 3. Vlans must be configured manually pruning vlans not having any access ports on an end switch are removed from the trunk to reduce flooded traffic. To enable vtp pruning on a cisco ios switch, you use the vtp pruning vlan configuration command. Issue the show vtp status command on switch 1 to view the default configuration. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The default vtp mode on cisco switches is the server mode, so the command vtp mode server wasnt needed in the sw1 configuration pictured above. If you enable the aggressive mode, after all the neighbors of a port age out either in the advertisement phase or in the detection phase, udld restarts the linkup sequence to resynchronize with any potentially outofsync neighbor and. Use the udld port command in interface configuration mode to enable udld on other interface types.
To better understand the true value of vtp, consider an example network with 100 switches. Client mode receives and forwards advertisements from servers. This reduces the need to configure the same vlan everywhere. When running in client mode, your switch will only receive configurations from other devices and will not allow changes to vlans to be made on that specific switch. The device must be in server or client mode not transparent. With vtp v1 and v2 it is not possible to completely disable vtp on cisco switches. To configure catalysts for vtp, a vtp domain name is created, and the vtp mode is configured. This completely eliminates the possibility of have a plugandplay way of accidentally overwriting another networks vtp database. Extended vlans support in all vtp modes server, client, transparent backward compatibility with v2 v3 not compatible with v1 vtpv3 capable switch has new vtp mode off, hence vtp can be disabled globally. Huawei lacp mode configuration cisco lldp configuration example cisco. A switch that is in server or client mode with a higher configuration revision number than the existing vtp server updates all vlan information in the vtp domain. Issue this command in order to set the vtp domain name. This switch can create, modify, and delete all vlans within the. Finally i will verify vtp is working with some useful show and debugging commands.
We have 9300 2 switch stack for distribution layer. If you configure the switch for vtp client mode, the switch does not create the vlan database file vlan. To enable vlan trunking protocol vtp on a perport basis, use the vtp command in interface configuration mode. In vtp transparent mode, you can configure vlans add, delete, or modify and private vlans. Server mode on switch is typically configured when decided to manage add, remove, name vlans from one place this switch. I may have answered own question above but the real question really is.
Catalyst 3750x and 3560x switch software configuration. Switch sw1 has been configured with the vtp mode client, vtp domain fred, and vtp version 2 commands. When you save vtp information in the switch startup configuration. When it receives a vtp message, it incorporates with the change and then forwards it from remaining trunk ports. Open a console connection to switch 2 and enter the following ios commands from global configuration mode to configure vlan trunking protocol vtp in switch 2. Vtp packets are sent to the destination mac address. Vtp transparent mode a switch opering in this mode doesnt.
Vtp is configured on the testrange core switch trcore1 and the top of. Use the show vlan command to confirm that only default vlans exist and that all ports. Be sure to find out whether a switch is operating in vtp server, client, or transparent mode before you do anything. This is the default vtp mode for a new switch with the vtp domain set to null. How to configure vtp server mode on cisco switch grandmetric.
When a switch joins the stack, it inherits the vtp and vlan properties of the stack master. Switches in vtp client mode store vlan information in nvram. Vtp configuration is the same in all members of a switch stack. A switch connected to another switch via an access port will not allow vtp to propogate vlans. Switches in vtp server mode cannot be updated by switches in vtp client mode. Vtp server mode a switch using this mode can create and delete vlans. Mac startup key combinations learn about the mac features and tools that you can access by holding down one or more keys during startup. Sw1 is now the only device that can make changes to the contiguous v3 pvst vlan database.
Sw1 has no other vtp configuration commands configured. I will configure port fa09 on each switch as a trunk port, configure vtp for the domain lab. Vlan trunk protocol vtp reduces administration in a switched network. Server mode is the default vtp mode for most catalyst switches. Solved vtp mode client to transparent cisco spiceworks. To disable vtp on a perport basis, use the no form of this command.
Vtp domain to vtp transparent mode cisco community. Switches in vtp transparent mode revert back to vtp server mode after a reboot. If you configure a switch for vtp transparent mode, you can create. But, in contrast to vtp server, a vtp client cannot create, modify, or delete vlans. View and download cisco wsc296024lcs software configuration manual online.
Vtp server mode is set with the following commands in configuration mode. Vtp is a ciscoproprietary protocol that is available on most of the cisco catalyst series products. This is the default mode on your switches when you unpack them. This command is executed in global configuration mode and sets the switch as a vtp client which learns its vlan information from the vtp server in its. To keep the vtp configuration with vtp client mode after the switch restarts, you must first configure the vtp domain name before the vtp mode. Only contains vtp domain name, configuration revision number. Here we configure the vtp domain as, vtp mode as client and vtp password as omnisecupass. To configure a switch as a vtp client, use the vtp mode client global configuration command. Vtp client mode sendsforwards vtp advertisements and synchronizes vlan configuration information with. If you change the client to transparent and added the vlans, the vlan database will reflect that, however, when put back into client mode, the vtp updates received from the server will simply overwrite the changes you have made if they are different. When vtp mode is transparent, the stack is not taking part in vtp. Cisco ios lan switching command reference udld through. Using vtp, you configure vlans on a vtp server and then distribute the configuration to other vtp devices in the vtp domain.
Vtpv1, vtpv2, vtpv3, vtp pruning, manual pruning quizlet. Vlan trunking protocol vtp server mode is the default vtp mode for all catalyst switches. Client a switch in vtp client mode receives information from vtp servers, but it also sends and receives vtp updates just like vtp servers. This is important because the vtp serverconfigured switches are the masters of the vlan information, and whatever vlan configuration data has been configured in them will be distributed to the switches in vtp client and. Vlans cannot be manually configured on switches in client mode transparent mode forwards advertisements but does not participate in vtp. Switches in vtp server mode store vlans in the vlan. Switches in vtp transparent mode forward vtp advertisements. Note the command vtp primary vlan is in privilege exec mode and is not saved to the config if you reboot you lose this privilege. How can i force vtp clients to update their vlan database.
898 560 995 517 1360 1482 1511 289 1137 189 583 110 867 466 1005 1447 500 237 75 501 578 1637 864 992 328 1652 857 391 451 743 1009 855 975 684 685 583