switching: vtp
fredmoogie
Member Posts: 80 ■■□□□□□□□□
in CCNA & CCENT
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="]sh vtp status[/FONT], it displayed [FONT="]version = 2[/FONT]
however, when i execute [FONT="]vtp version 1[/FONT], it says [FONT="]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.
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="]sh vtp status[/FONT], it displayed [FONT="]version = 2[/FONT]
however, when i execute [FONT="]vtp version 1[/FONT], it says [FONT="]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.
Comments
-
NOC-Ninja
Member Posts: 1,403
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. -
Monkerz
Member Posts: 842
Don't think it is a bug specific to PT, I think the older IOS' like 12.1 used the "VTP Version" field to note what version the switch was capable of running, rather than what the switch is currently running.
From my lab (12.1(26)E4):TESTLAB02SW017(config)#vtp version 1 VTP mode already in V1. TESTLAB02SW0017(config)#do sh vtp status VTP Version : 2 Configuration Revision : 0 Maximum VLANs supported locally : 1005 Number of existing VLANs : 39 VTP Operating Mode : Transparent VTP Domain Name : NeverlandRanch VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Enabled MD5 digest : 0xC2 0x83 0xB2 0x2D 0x42 0xF3 0x10 0xB4 Configuration last modified by 10.151.1.3 at 0-0-00 00:00:00