VTP configuration lost after rebooting the switch 2960S

[awadmohammad5]

Hello Experts,

i want to connect a 2960S cisco switch in our production network so i erased the startup config deleted vlan.dat rebooted then changed the VTP mode to client and VTP domain to TEST

after saving the config again i reloaded the switch but VTP config got lost even though i saved it it back to default VTP config mode server and domain NULL 

anyone knows why its happening like this ?

[Leo Laohoo]

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@awadmohammad5 wrote:

changed the VTP mode to client and VTP domain to TEST

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VTP domain cannot be changed without a VTP password.

[awadmohammad5]

please elaborate it didnt get it clearly

[Julio E. Moisa]

Check the password used on the server:

show vtp password

and confirm if it is the same you configured for the new client. Also check the sync between them you could compare the MD5 Digest Values. 

[paul driver]

Hello

After reload do you lose all config of the switch not just the vtp d/b ?

try deleting vlan.dat and config.txt this wipe the switch entirely 

when the switch reloads - make sure the vtp versions are correct ( 1 - 2 are not compatible ) and the correct domain is set 

If you have done all this and your vtp d/b does get populated and you’ve saved the config also and you still lose the vtp database and all data after reload then check your Config-File  variable on the switch 

sh boot 

or 

sh bootvar

res

paul