By default, VTP pruning is disabled. 1. Note that on some platforms, I’ve noticed that no changes will propagate unless there is a password (this is the benefit of. To configure switch to work as VTP server mode: switch# configure terminal. Switch_IOS(config-if)#private-vlan mapping add secondary_vlan_list or Switch_IOS(config-if)#private-vlan mapping remove secondary_vlan_list; Note: For Catalyst 6500/6000 switches with MSFC, ensure that the port from the Supervisor Engine to the. 01-28-2016 01:36 PM. By default, Cisco switches do not have a VTP domain name assigned. SW1 (config)# vtp domain ipwithease. Off—In the three described mod. You make global VLAN configuration changes for the domain using either the command-line interface (CLI) or Simple Network. Switch_1#conf t Switch_1(config)#vtp domain yourdomain Switch_1(config)#vtp mode server Switch_1(config)#vtp password yourpassword Switch_1(config)#vtp version 2 . A network device can be configured to be in only one VTP domain. Client mode – clients only get the VLANs advertised by the VTP server. When you save VTP mode, domain name, and VLAN configurations in the switch startup configuration file and reboot the switch, the. What happens. Jon. - Setting device to VTP Client mode for VLANS. dat file, especially for the VTP server systems. VTP sends messages between trunked switches to maintain VLANs on these switches in order to properly trunk. Restrictions for VTP Supervisor engine redundancy does not support nondefault VLAN data filenames or locations. The name can be 1 to 32 characters. if present, the VTP domain password has to be the same. Reboot the switch. 1) Demote the switch that is the current vtp server and running vtp version1 to transparent mode. EN US. Eg: all switches in VTP domain cisco, will be updated on VLANs created or deleted on any switches (VTP server), within that VTP domain. VTP version 1, VTP version 2 and VTP version 3 support VTP pruning. Switch(config)#VTP password cisco. When VTP pruning is enabled on a VTP server, pruning is enabled for the entire management domain. See the€ Backup and Restore of vlan. The name can be 1 to 32 characters. Download your complete 350 page Lab Guide covering everything on the latest CCNA exam here. VTP server and VTP domain. I'm planning to remove VTP from our LAN by changing the VTP clients to transparent, change the vtp domain on each switch then remove the unused vlans from each switch. This goes against my understanding of VTP. You can enter the vlan-range using a comma. Ah, I'm now that I'm back at a PC (prior reply made on my phone), being curious, I wondered about "off" mode being somehow limited to just usage in VTPv3. Changes in the VTP transparent switch are not sent over the trunk to other VTP switches. ). . With VTP Versions 1 and 2, you cannot change the VTP mode to client or server if. The VTP server is where you would create, remove, or modify VLANs. With VTP Versions 1 and 2, you cannot change the VTP mode to client or server if extended. Use. Mini-lab – Configuring VTP. This switch is becoming Primary server for vlan feature in the VTP domain VTP Database Conf Switch ID Primary Server Revision System Name VLANDB Yes 00d0. dat file. 6-4: VLAN Trunking Protocol. To configure a switch as a VTP server, use the vtp mode server global configuration command. Informations générales. Erasing the nvram filesystem will remove all configuration files! Continue? [confirm] [OK] Erase of nvram: complete. Switch#show vlan briefI have 2980 switch running 6. Step 4: vtp mode server. Step 3 Select Reports > VLAN Report from the menu. First we will try to enable VTP version 3 on one of our switches: SW1 (config)#vtp version 3 Cannot set the version to 3 because domain name is not configured. It is the default mode of VTP on most series of switches. VTPドメイン名の設定. Quick output: running-configs do not have the vtp configurations. Configuring basic VTP on CISCO Switches. SwitchB# configure terminal. . A write erase does remove the vtp information. If you really need to clear the VTP domain name, you could try to move the switch into transparent mode, download the running config into your PC, remove the. VTP is available on most of the Cisco Catalyst Family. Good luck,A VTP domain includes one or more network switches that share the same VTP domain name and that are connected with trunk interfaces. You can also change the VTP domain name by entering the vlan database privileged EXEC command to enter VLAN configuration mode and by entering the vtp domain domain-name command. Mark as New; Bookmark; Subscribe; Mute;Step 2 no vlan vlan-id: Remove the VLAN by entering the VLAN ID. If the switch is in VTP server or VTP transparent mode, you can add, modify or remove configurations for VLANs 2 to 1001 in the VLAN database. Ensure that all switch interconnects. learned about the VLANs from the VTP servers. I have a customer who configure all the distribution switches as VTP server (usually 4 per VTP domain) and he hasn't had any problem for several years. Once this is done, the VTP domain can only be changed manually. A network device can be configured to be in only one VTP domain. Then go around each switch disabling vtp. One can also reasonably deploy VTP for any number of valid reasons. In the server mode, we can add, remove and edit VLAN. In short, no. If operationally possible change the switch to transparent mode,you will then need to delete the vlan. Step 33. Delete vlan. One of which from reading other posts, I. 28. A switch can be in only one domain. These modifications are then distributed to all switches in the VTP domain. If you really need to clear the VTP domain name, you could try to move the switch into transparent mode, download the running config into your PC, remove the. VTP gets a really bad rap, but the revision number really is the single key value in the whole operation. If operationally possible change the switch to transparent mode,you will then need to delete the vlan. It sounds like you desire your network to only have secondary switches - a switch will lose its primary status when it is reloaded and has to rejoin the vtp domain. In addition to what Soroush already said, usually when you configure a switch in transparent mode you don't want to be part of VTP domain, so you don't configure domain name, password , etc. 1. Hello Steve, very good note Best Regards GiuseppeVTP can run in three different modes: Server mode – in server mode you can create, remove and modify VLANs. So you can configure it back to null domain with "vtp domain NULL "and hit enter. VTP Operating Mode : Server VTP Domain Name : VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled . The vtp mode transparent command disables VTP from the domain but does not remove the domain from the device. Options. VTP servers in the network. This is because the VTP domain name (just the name) is also carried in the DTP packet. (To remove 802. A VTP domain is made up of one or more interconnected network devices that share the same VTP domain name. org VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0x2A 0x0B 0x2C 0x0D 0xAE 0x80 0xCA 0x89. If you can not remove temporarly the existing ACL make sure that you permit statements go to the top. Hi Cap, by default domain 1 vlan users cannot able to communicate domain 2 vlan users as the domain name varies, since you specified the ip route command saying that domain 2 vlan users should access internet which is connected in domain 1 vlan, it works, but if u specify like that domain 1 vlan users can communicate domain 2 vlan. You make global VLAN configuration changes for the domain using either the command-line interface (CLI) or Simple Network Management Protocol. When enabled, VTP version 3 provides the following enhancements to previous VTP versions: Support for extended VLANs. It saves VLAN information in the vlan. VLAN Trunking Protocol (VTP) CONFIGURATION. First, connect two switches together with a crossover cable. Switch(config)#show VTP counters. Date-SW#sh int trunk. Remove the VTP domain name from all switches with ―null‖ and then replace it with the new domain name. Each switch synchronizes its configuration to. A network device can be configured to be in only one VTP domain. By default, the switch is in the VTP. Hi, As you can't delete the VTP domain name. After using the command erase startup-config and reloading the switch, the administrator finds that. VTP sends messages between trunked switches to maintain VLANs on these switches in order to properly trunk. By default, VLANs 2 through 1000 are eligible for pruning. Clients don't auto-configure VTP domain when they receive a VTP packet. dat file but that is not a feasible soultion. •- Come back to your VTP domain name. VTP server. The network is composed of 2 6509's running CatOS running ver 6. Is there a way to remove the VTP domain name on an IOS-based Catalyst switch without resetting? In 'vlan database' mode I have tried the following which do NOT. 2) Reset the VTP counters to allow the switch to synchronize with the other switches in the domain. 1400 1 stp7Hello, I'd like to know if we change a vtp client switch from VTP domain "a" to vtp domain "b" (VTP domain "b" currently not existing) if he will keep his vlan database and then can be turne to vtp server for domain "b" and propagating the vtp domain "a" learned vlan to his vtp domain "b" clients s. Below are VTP components:-What is VTP Domain. There are four roles in the VTP architecture: Server: The server switch is responsible for the creation, modification, and deletion of VLANs within the VTP domain. HTH, jerryFIG 10. VLANs cannot be configured locally on a VTP client. VTP can play a role as well, most usually stay away from a vtp domain since a change one place can add or remove vlans for the entire domain. VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks on the whole local area network. A VTP domain (also called a VLAN management domain) consists of one switch or several interconnected switches under the same administrative responsibility sharing the same VTP domain name. Fa0/24 1. . (configt)#vtp domain XXX. Explanation: When adding a new switch to a VTP domain, it is critical to configure the switch with a new domain name, the correct VTP mode, VTP version number, and password. A network device can be configured to be in only one VTP domain. Depending on the role, switches functionalities are different. 1 - No DTP is a different protocol to vtp. (To remove an interface, use the no form of this command. The proprietary cisco VTP protocol might be a good tool to manage a domain of switches. Uses the no keyword to remove the password. Although you can't have multiple VTP domains on a single switch, you can connect two switches in different domains. 00b8. Let’s set one and try again: SW1 (config)#vtp domain NWL Changing VTP domain name from NULL to NWL %SW_VLAN-6. Switch(config)# vtp domain domain_name (Optional; for server mode only) Defines the VTP domain name, which can be up to 32 characters long. A few things worth troubleshooting are: 1. VTP shares VLAN configuration information between Cisco switches on trunk connections. In example below the vtp domain is called example. e: creating Vlans) to forward the required Vlans as a transit L2 device. Edited February 16, 2020 at 4:48 AM How many ways to delete vtp domain name? I try to search for way to delete vtp domain name. Yes. If the VTP Server removed, all the client of VTP Lost connection, so you have vlan database issue. . The VTP server is where you would create, remove, or modify VLANs. Solved: Hi all, I have some problems using VTP and PVST+ so I decided to get rid of VTP. A switch can be configured only in one VTP domain. ) from a single switch in an enterprise network. Repeat these steps on SW1, SW2 and SW3. VTP messages are exchanged between switches within a common VTP domain. VTP는 대부분의 Cisco Catalyst Series 제품에서. Beginning with Release 5. VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates VLAN’s on the whole local segments participating in the VTP domain. I do not see any issue here, remove VTP from environment. Note You cannot clear the. (To remove an interface, use. (VTP information goes out over VLAN 1, the default VLAN, which is why you aren't allowed to remove or prune that VLAN from a VLAN trunk link. The domain name is now a requirement, it can’t be null. VTP Configuration Guidelines. In this Cisco CCNA training tutorial, you’ll learn about Cisco VLAN Trunking Protocol (VTP) which enables the deletion, renaming, and addition of VLANs on switches configured as VTP servers. dat". dat" followed by a reload would do it, but now I found that I was NOT quite correct! When a switch is not connected to any other switches, removing "vlan. C. A network device can be configured to be in only one VTP domain. All the new switches (outside of IP address etc) are identical- VTP Version capable : 1 to 3 VTP version running : 1 VTP Domain Name :. point of VTP is less manual. 00b8. Switches in different VTP domains do not. One of VTP characteristics is that a VTP Server (A) can also act as a Client VTP, as a result, if another VTP Server (B) - belonging to the same VTP domain - is added by mistake or by an attacker. If you start with the switches that are "servers" this will stop any vlan changes from being propagated via vtp even if other switches are still set as clients. 1400 1 stp7VTP Domain Name : vtp. Buy or Renew. Step 3 end: Return to privileged EXEC mode. In VTP Versions 1 and 2, the VTP mode must be transparent for VTP and VLAN information to be saved in the running configuration file. Switches run pruning command independently. dat file in client mode from the updates from the server, in server and transparent. With this config, the switches trunk. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products. Backup and Restore the vlan. Therefore, VTP works properly in the domain. All devices in a VTP domain must have the same domain name, but they do not need to run the same VTP version. I thought at first just remove "vlan. dat". ドメイン名は、デフォルトでは空の文字列（名前なし）です。 VTPで同期を行うには同じドメイン名の設定が必要です。 ドメイン名の設定は、グローバルコンフィグレーションモードで次のvtp domainコマンドをThen you can remove the old vtp server from the network Once the new switch has been configured of line with the correct vtp domain/password (if applicable) and before adding it to the existing network change to vtp mode to transparent and back to client. Enabling VTP pruning on a VTP server enables pruning for the entire management domain. Or (config)#vlan xxx name XXXX. Example: Device# show vtp status: Verifies the VTP configuration on both Switch. convert Client First VTP Client to VTP Transparent, if required create VLAN required Locally. To restore a IOS switch to a "whole new" state, it is necessary to clear even the "VTP domain" string to null. A VTP domain (also called a VLAN management domain) consists of one switch or several interconnected switches or switch stacks under the same administrative responsibility sharing the same VTP domain name. 1Q encapsulation for the. Configure the VTP administrative-domain name. Add or remove a vlan on the switch that is a vtp server and it should show up in less than a min. Highest database revision number, for the VTP domain, is considered the "best" for VLAN definitions. So in order to negotiate a trunk through DTP you need to have a matching (or null) VTP domain. Received VTP updates are ignored if the passwords on the sending and receiving switch. 1, change the vtp domain into transparent mode, copy the configuration into notepad, 2, delete the vlan. trunk port) switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate Step 9. 00b8. If VLAN 120 is present on the trunk , it should forward that traffic regardless of VTP. Here are the two issues that I am having. 10 years ago. Configure the VTP administrative-domain name. Step 3 All devices in a VTP domain must have the same domain name, but they do not need to run the same VTP version. Note You cannot clear the domain name. VTP pruning removes the unnecessary vlans from the trunk but does not remove the spanning-tree instance that is still running for that vlan. You need to change each switch's VTP mode to transparent or (if a later IOS) off . The domain name is now a requirement, it can’t be null. I recomend staying away from VTP, specially if you have a limited number of vlans. This is not a problem in our environment - it's just that another experienced engineer and I were completely focused on accomplishing this minor task and. And all of them is in one VTP domain. 4. Only way i know is removing vlan. A VTP version 2-capable device can operate in the same VTP domain as a device running VTP version 1 if version 2 is disabled on the version 2-capable device (version 2 is disabled by default). VTP propagates the VLAN information to all switches in the VTP domain. Try it in the lab. Layer 2 trunk interfaces, Layer 2 port channels, and virtual port channels (vPCs) support VTP functionality. " erase cat4000_flash: " then reload your switch. The VTP revision number is 201. This is incredibly. System Device# showvtppassword VTP Password:What do i need to do to join the exisiting vtp domain? Will the switch join the domain by itself without any configuration when i do a trunking to the existing switches?(there's no password set for the vtp domain). Usually, in a few seconds. However, you can only have 1000 active VLANs at a given point of time. Understanding the VTP Domain. Note: Before you delete the file from NVRAM, it is recommended to make a backup of the file. "Place the switch in VTP off mode. You make global VLAN configuration changes for the domain using either the command-line interface (CLI) or Simple Network Management Protocol. switch (config)# vtp mode server. Best to turn off dtp as well as vtp. You make global VLAN configuration changes for the domain. . Options. Like Liked Unlike Reply. Different VTP domains cannot communicate. HTH. Layer 2 trunk interfaces, Layer 2 port channels, and virtual port channels (vPCs) support VTP functionality. •- Enter the command to disable VTP pruning. switchport trunk pruning vlan remove 6) do we issue this command 2 times on each end of the trunk interface , and must do this for all the trunks that vlan6 will pass through . First we will try to enable VTP version 3 on one of our switches: SW1 (config)#vtp version 3 Cannot set the version to 3 because domain name is not configured. Through VTP, the user can synchronize VLAN name, VLAN ID, and other VLAN information; with Cisco switches inside the same domain. A network device can be configured to be in only one VTP domain. When you enter the vlan vlan-id command, a new VLAN is created with all default parameters and causes the CLI to enter VLAN configuration mode. In regards to the data transmission between two different vtp domain, VTP has nothing to do with the data transmission. See the “Adding a VTP Client Switch to a VTP Domain. Yes, VTP client can forward VTP messages to other switches (transparent, clients and/or servers). VTP enables the management of VLAN configuration (Vlan addition, deletion, etc. nxos. Entire call center goes down. Francois, Thanks very much for the detailed answer. Sep 24, 2016 at 18:00. Note 1- This should be used when you don't find Vlan. Here is example code: SW1 (config)#vtp mode client. Like Z0nk said above, VTP should not affect the forwarding of any vlan. has proved to be a solution in most cases) or a bug (i. By default, Cisco switches do not have a VTP domain name assigned. Default VTP Configuration VTP domain name - Null VTP mode - Server VTP version 2 enable state - Version 2 is disabled VTP password -. Switch (config)#no vtp pruning. vtp domain TWO. g. • If the VTP mode or domain name in the startup configuration does not match the VLAN database, the domain name and VTP mode and configuration for the first 1005 VLANs. A VTP server will advertise all VLANs configured on the switch via VTP in an attempt to maintain a synchronized VLAN database on all switches in the particular VTP management domain. فكرة هذه الخدمة هي أن تقوم بتنظيم جميع السويتشات تحت نطاق واحد بأسم نطاق معين و تفيد ايضاً عندما نقوم بعمل اكثر من شبكة و تكون هذه الشبكة تم عملها على أكثر من سويتش في نفس الشبكة و نفس النطاق سنقوم بتفعيل. VTP server mode requires a domain name. The command "del vlan. Mel. Also when you are in server mode, you can still have no config for the domain name if you did not have any and you were in transparent mode before: NMS-CAT6K-B (config)#vtp mode. The only caveat is the VTP Pruning - if you are using it, you must first deactivate it on any VTP Server switch using the no vtp pruning command. If you add a switch that has a revision number higher than the revision number in the VTP domain, it can erase all VLAN information from the VTP server and VTP domain. This command is optional for modes other than server mode. VTP is a Layer 2 messaging protocol that maintains VLAN configuration consistency by managing the addition, deletion, and renaming of VLANs within a VTP domain. The second example depicts how to configure a VTP network using the domain name ‘CisCo’, a password of ‘Password’ and by making SW2 transparent. Need to add VLAN to switch. – Ricky Nov 23, 2014 at 1:10 Add a comment 2 Answers Sorted by: 9 In theory,. (VLAN IDs 1 and 1002 to 1005 are automatically created and cannot be removed. dat files do not match, the switch uses the configuration in the vlan. VTP servers advertise their VLAN configurations to other devices in the same VTP domain and synchronize their VLAN configurations with other devices based on advertisements. . VTP server mode requires a domain name. . vtp domain domain-name. VTP server. I plan to do 1 switch stack every week. Sends domain name in VTP updates. The vlan. The broadcast traffic from Device A is not forwarded to Devices C, E, and F because traffic for the Red VLAN has been pruned on the links shown (Port 5 on Device. Each network device can be in only one VTP domain. VTP domain is a collection of switches set with the same VTP domain string. - Setting device to VTP Client mode for VLANS. Once the VTP client switches have been updated with the new VTP server domain and password details, they will start receiving VLAN updates from the VTP server switch. Trunking is up as command on client switch. set vtp domain abcd1 Please, let me know if there is any command available with out clearing all the configuration. When you enable version 2 on a switch, all of the version-2-capable switches in the domain enable version 2. With this config, the switches trunk. VTP pruning allows a switch to dynamically indicate to a remote switch on the other side of a trunk that the traffic within a [inactive] VLAN not. Options. Edited February 16, 2020 at 4:48 AM How many ways to delete vtp domain name? I try to search for way to delete vtp domain name. This command is required only if the Catalyst switch is in a VTP domain. Regards, ChristopheOne of my readers sent me a question that triggered one of my old grudges: In my experience, when you first add a new switch (having a NULL domain) on an existing VTP Domain, it inherits the domain name, regardless of it being a VTP Server. SW1 and SW2 start out knowing about VLAN 2 as a side-effect of the switchport access vlan 2 commands on each. This VTP server sends an advertisement, across the domain, every 5 minutes or whenever a change is made in the VLAN database. A VTP version 2-capable device can operate in the same VTP domain as a device running VTP version 1 if version 2 is disabled on the version 2-capable device (version 2 is disabled by default). dat and reload, if that doesn't clear the name you may have to TFTP the startup-config off the switch, delete the VTP domain name in the file and then tftp it back on the switch, then reload. 2. 1. A switch can be in only one VTP domain. 한 대의 VTP 서버에서 새로운 VLAN을 설정하면 해당 VLAN은 도메인의 모든 스위치를 통해 배포됩니다. There will be something name as NULL or anything else. the link between the switches has to be a trunk link. VTP Configuration Commands. On Client switch # vlan database # vtp password newpwd exit exit. Roles are Server Mode, Client Mode, Transparent Mode. Step 3 –. switch (config)# vtp domain Grandmetriclabs. show vtp status. A VLAN Trunking Protocol (VTP) domain is one switch or several interconnected switches sharing the same VLAN Trunking Protocol (VTP) environment. com: VLAN Trunk Protocol (VTP) reduces administration in a switched network. Changing the domain name will reset the configuration revision number. Mel. If you are using VTP transparent mode then the vlan information is also stored in the running config as well. Switch. vtp domain "xxx" SW2: vtp mode client. ; Before installing a redundant supervisor engine, enter the no vtp file command to return to the default configuration. ). This example shows how to configure a VTP password: Switch# vtp password WATER Setting device VLAN. Configure a different native VLAN on all new switches that are configured as VTP clients. Servers and clients transmit information through trunks to other attached switches and receive updates from those trunks. A VTP domain is made up of one or more network devices that share the same VTP domain name and that are connected with trunk interfaces. SW1 (config)#vtp mode server. With VTP Versions 1 and 2, you cannot change the VTP mode to client or server if. Similarly, if you want to remove one of the vlans from the trunk (let’s say vlan 2), you can do so as following: switchport trunk allowed vlan remove 2. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. In VTP Versions 1 and 2, the VTP mode must be transparent for VTP and VLAN information to be saved in the running configuration file. 1(1), the server mode is the default mode. 3 – VTP domain. so either it cosmetic bug (not effect the VTP) or it not, after you match the ver in both SW and config one server and other client. show vtp status. Because VLAN IDs 1 to 1005 are global in the VTP domain and can be defined on other network devices in the VTP domain, you can use only extended range VLANs with subinterfaces in VTP client or server mode. To remove (config)#no vlan xxx . By default, the switch is in VTP no-management-domain state until it receives an advertisement for a domain over a trunk link or until you configure a domain name. By default, a Catalyst switch is in the no-management-domain (or null domain) state until it is configured with a domain or receives an advertisement for a domain over a trunk link. Edison, What about "switchport nonegotiate" and "switchport mode trunk" on the trunks going to the third-party switch in order to make the trunk come up? Of course we then have to make sure that the third-party switch have the right VLANs configured and allowed on the trunk port towards the two Cisc. Router(config)# vtp domain domain_name (Optional for server mode) Defines the VTP domain name, which can be up to 32 characters long. If you add. Switch(config)#show VTP status. If you. Step 6: show vtp status. All vlans are still active. Each VTP domain must have at. All switches operating in VTP server or client mode under the same administrative responsibility must be configured with the same domain name. Using VTP. Example of how VTP works VTP Domain. Solved: Currently our organization has a VTP domain setup at several location. Enter configuration mode and use the following commands to enable client mode. BB. You can change the vtp mode with the command "vtp mode server" Best regards! Expand Post. So even before any VTP advertisements are exchanged, the VTP domain is contained within the DTP negotiation packets, and this is how devices know if they can form a trunk or not. VTP server. VTP pruning is a global command and affects all the switches in the VTP domain. Some VTP commands you can run in exec mode and don’t need to be in global config. Options. All switches operating in VTP server or client mode under the same administrative responsibility must be configured with the same domain name. Because VLAN IDs 1 to 1005 are global in the VTP domain and can be defined on other network devices in the VTP domain, you can use only extended range VLANs with subinterfaces in VTP client or server mode. A VTP domain is made up of one or more interconnected network devices that share the same VTP domain name. Usage Guidelines. 00b8. This switch is becoming Primary server for vlan feature in the VTP domain VTP Database Conf Switch ID Primary Server Revision System Name VLANDB Yes 00d0. Chapter 13 Configuring VLANs, VTP, and VMPS VLANs Note When the switch boots, if the VTP domain name and VTP mode in the startup-config and vlan. adding another VLAN anywhere in the VTP domain creates a VLAN on that device that is not running.