switching: vtp

fredmoogie

4 questions please:

1. the default of vtp when you first connect a switch is:
vtp version = 1

- possible packet tracer(5.3.3) bug. when i do a [FONT=&quot]sh vtp status[/FONT], it displayed [FONT=&quot]version = 2[/FONT]
however, when i execute [FONT=&quot]vtp version 1[/FONT], it says [FONT=&quot]vtp mode already in version 1[/FONT]

can someone verified if this is indeed a bug?

see attached (vtp_version.png)



2. i am unable to enable vtp pruning. what is the command? perhaps not possible using packet tracer?

some place online tells me to execute: Switch(config)#vtp pruning enable or vtp pruning, i get error:% Invalid input detected at '^' marker.

see attached (vtp_pruning.png)



3. instead of using vtp pruning certain vlan, can't you just allowed or disallowed certain vlan ? is it doing the same thing? please clarify.

4. for configuring native vlan, which is the correct command:

a) S1(config-if)#switchport trunk native vlan 99
b) S1(config-if)#switchport native vlan 99

are they both the same thing? please clarify.

thanks very much.

vtp_version.PNG

vtp_pruning.jpg

NOC-Ninja

1.

Thats a bug.

Here's my test in my real hardware home lab. (3560 with 12.4T)

SW1(config)#do s vtp status
VTP Version : running VTP2
Configuration Revision : 0

SW1(config)#vtp ver 1
SW1(config)#do s vtp status
VTP Version : running VTP1 (VTP2 capable)
Configuration Revision : 1


the message "vtp mode already in V1" doesnt show up in my hardware.


2. Packet tracer have bugs. You might as well use GNS3.
3. switchport trunk allowed vlan
4. google my friend.