topic Hi Julio Moisa, in Routing and SD-WAN

create new valn

mahir1234567892 — Tue, 05 Mar 2019 15:58:40 GMT

i have tow core switch cisco 4500 i need to create new vlan no.8, can't able to create this vlan, see below message in core switch 1.

(Core-1(config)#vlan 8
VTP VLAN configuration not allowed when device is not the primary server for vlan database.)

core switch 2.

Core-2(config)#vlan 8
VTP VLAN configuration not allowed when device is in CLIENT mode.

how to fixed this issue

thankyou

Hi

Julio E. Moisa — Sat, 04 Feb 2017 14:26:17 GMT

About Core-2 The reason is because your device is configured as vtp client mode, you can create vlans on the devices configured as the vtp server or transparent mode.

You should verify who is your device with vtp server mode and create the vlan 8 there, it will propagate the vlan to the client devices.

About Core-1, you probably are using vtp version 3, and this devices is not configured as primary server for vtp. Other device could be configured as server on your network. It should be verified first.

Please check this link for more info about vtp version 3: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-series-switches/solution_guide_c78_508010.html

https://networklessons.com/switching/vtp-version-3/

Also you can run: show vtp status to know the mode used on the device.

Hope it is useful 🙂

Hi Julio Moisa,

mahir1234567892 — Sat, 04 Feb 2017 14:51:18 GMT

Hi Julio Moisa,

see below VTP status in core 1 and core 2

Core-1#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : MAHIR-MED
VTP Pruning Mode : Enabled
VTP Traps Generation : Enabled
Device ID : f0f7.553a.cf80

Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 129
Number of existing extended VLANs : 499
Maximum VLANs supported locally : 4094
Configuration Revision : 556
Primary ID : f0f7.553a.cf80
Primary Description : AQEEQ-B1-Core-1
MD5 digest : 0x7F 0xA1 0x18 0x9B 0x7B 0xE9 0x3C 0x95
0xA8 0x55 0x2D 0xD2 0xB3 0x43 0x88 0x4C

Feature MST:
--------------
VTP Operating Mode : Transparent

Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent

core2

Core-2#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : MAHIR-MED
VTP Pruning Mode : Enabled
VTP Traps Generation : Enabled
Device ID : f0f7.553a.cd40

Feature VLAN:
--------------
VTP Operating Mode : Client
Number of existing VLANs : 129
Number of existing extended VLANs : 499
Maximum VLANs supported locally : 4094
Configuration Revision : 556
Primary ID : f0f7.553a.cf80
Primary Description : AQEEQ-B1-Core-1
MD5 digest : 0x7F 0xA1 0x18 0x9B 0x7B 0xE9 0x3C 0x95
0xA8 0x55 0x2D 0xD2 0xB3 0x43 0x88 0x4C

Feature MST:
--------------
VTP Operating Mode : Transparent

Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent

Hello guys,

mahir1234567892 — Sun, 05 Feb 2017 07:39:12 GMT

Hello guys,

please help me regarding above issue.

Hi,

Julio E. Moisa — Sun, 05 Feb 2017 12:18:57 GMT

Hi,

Apologies for the late response, please let me verify your config. Just a question, is it a new vtp implementation on your devices? you could configure the following command on your vtp server device (Core-1):

switch# vtp primary (force is optional but you can use it if you want to force to take this role, try first with vtp primary only)
switch# vtp primary vlan (note: not over configure terminal)

Please double check first how your network has been working in order to avoid any inconvenience. You have to be cautious with vtp, remember have backups of your configurations.