VLANs are not displayed in running config

[csaravanan-sym]

Hi,

We have Cisco 3750-48-TS switch. I created VLANs. I could see the vlans when I enter - show vlan

I dont see them when I enter - show run

What should I do so I can see them on Running config as well

The switch is running Cisco IOS 12.2 (50)SE 5

Thanks,

Chandru

[Peter Paluch · Accepted solution]

Hi Chandru,

If you are running in VTP Server or VTP Client mode, the VLANs will not be visible in the running-config. You may verify them using show vlan command but the only place where their configuration is stored is in the flash:vlan.dat file. So what you are experiencing is actually normal.

VLANs will be visible in the running-config only if you change to VTP Transparent (or VTP off for VTPv3) mode.

Best regards,

Peter

[csaravanan-sym]

OK. Thanks Paul

Chandru

[Peter Paluch]

Chandru,

You are welcome.

Best regards,

Peter

[csaravanan-sym]

Hi Paul,

one more quick question. There was no VTP configuration at all on the switch.

Will VTP be enabled on an out of the box switch and also what is the default mode on them

yes after configuring the VTP mode Transparent, I was able to see the vlans on the running-config

Thanks,

Chandru

[manju.cisco]

Hi Chandru,

Default VTP mode is Server.

[Peter Paluch]

Hello Chandru,

Manju is correct - the factory default for VTP is VTPv1, Server mode, domain name set to NULL (empty string).

Best regards,

Peter