VTP status not showing the right number of existing vlans

Answered Question
Feb 13th, 2010
User Badges:

Dear friends,


Please have a look at the following information on a 6500. I would expect that the "Number of Existing VLAN's" in show vtp status to show 12 (vlan 100, 101, 998, 999, 2242-2245,2250-2253). But it only shows 9.

The following is the output of show vlan brief and show vtp status.

Does anyone know of the reason for this difference?



1    default                          active   
100  cust.sidradc.fwsmfo.01           active   
101  cust.sidradc.fwsmfo.02           active   
998  Native_vlan                      active   
999  Unused_vlan                      active    Te1/2/4, Te1/2/5, Te1/2/6, Te1/2/7, Te1/2/8, Gi1/5/1, Gi1/5/2, Gi1/5/3, Gi1/7/3
                                                Gi1/7/4, Gi1/7/5, Gi1/7/6, Gi1/7/7, Gi1/7/8, Gi1/7/9, Gi1/7/10, Gi1/7/11, Gi1/7/12
                                                Gi1/7/14, Gi1/7/15, Gi1/7/16, Gi1/7/17, Gi1/7/18, Gi1/7/19, Gi1/7/20, Gi1/7/21
                                                Gi1/7/22, Gi1/7/23, Gi1/7/24, Gi1/7/25, Gi1/7/26, Gi1/7/27, Gi1/7/28, Gi1/7/29
                                                Gi1/7/30, Gi1/7/31, Gi1/7/32, Gi1/7/33, Gi1/7/34, Gi1/7/35, Gi1/7/36, Gi1/7/37
                                                Gi1/7/38, Gi1/7/39, Gi1/7/40, Gi1/7/41, Gi1/7/42, Gi1/7/43, Gi1/7/44, Gi1/7/45
                                                Gi1/7/46, Gi1/7/48, Gi1/9/2, Gi1/9/3, Gi1/9/4, Gi1/9/5, Gi1/9/6, Gi1/9/7, Gi1/9/8
                                                Gi1/9/9, Gi1/9/10, Gi1/9/11, Gi1/9/12, Gi1/9/13, Gi1/9/14, Gi1/9/15, Gi1/9/16
                                                Gi1/9/17, Gi1/9/18, Gi1/9/19, Gi1/9/20, Gi1/9/21, Gi1/9/22, Gi1/9/23, Gi1/9/24
                                                Te2/2/4, Te2/2/5, Te2/2/6, Te2/2/7, Te2/2/8, Gi2/5/1, Gi2/5/2, Gi2/5/3, Gi2/7/1
                                                Gi2/7/3, Gi2/7/4, Gi2/7/5, Gi2/7/6, Gi2/7/7, Gi2/7/8, Gi2/7/9, Gi2/7/10, Gi2/7/11
                                                Gi2/7/12, Gi2/7/13, Gi2/7/14, Gi2/7/15, Gi2/7/16, Gi2/7/17, Gi2/7/18, Gi2/7/19
                                                Gi2/7/20, Gi2/7/21, Gi2/7/22, Gi2/7/23, Gi2/7/24, Gi2/7/25, Gi2/7/26, Gi2/7/27
                                                Gi2/7/28, Gi2/7/29, Gi2/7/30, Gi2/7/31, Gi2/7/32, Gi2/7/33, Gi2/7/34, Gi2/7/35
                                                Gi2/7/36, Gi2/7/37, Gi2/7/38, Gi2/7/39, Gi2/7/40, Gi2/7/41, Gi2/7/42, Gi2/7/43
                                                Gi2/7/44, Gi2/7/45, Gi2/7/46, Gi2/9/2, Gi2/9/3, Gi2/9/4, Gi2/9/5, Gi2/9/6, Gi2/9/7
                                                Gi2/9/8, Gi2/9/9, Gi2/9/10, Gi2/9/11, Gi2/9/12, Gi2/9/13, Gi2/9/14, Gi2/9/15
                                                Gi2/9/16, Gi2/9/17, Gi2/9/18, Gi2/9/19, Gi2/9/20, Gi2/9/21, Gi2/9/22, Gi2/9/23
                                                Gi2/9/24
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup
2242 cust.sidradc.wan.02              active    Gi1/7/1, Gi1/7/13, Gi2/7/48
2243 cust.sidradc.fwsm.01             active   
2244 cust.sidradc.wan.03              active   
2245 cust.sidradc.wan.04              active    Gi1/7/47
2250 cust.sidradc.lan.01              active   
2251 cust.sidradc.lan.02              active   
2252 cust.sidradc.lan.03              active   
2253 cust.sidradc.lan.04              active 


t3a.sidradc.core#sh vtp status
VTP Version                     : 3 (capable)
Configuration Revision          : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 9
VTP Operating Mode              : Transparent
VTP Domain Name                 : sidradc
VTP Pruning Mode                : Disabled (Operationally Disabled)
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Enabled
MD5 digest                      : 0x47 0x64 0x71 0x76 0x70 0xDA 0xEF 0x49
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
VTP version running             : 1



Thanks a lot

Gautam

Correct Answer by Ganesh Hariharan about 7 years 4 months ago

Dear friends,


Please have a look at the following information on a 6500. I would expect that the "Number of Existing VLAN's" in show vtp status to show 12 (vlan 100, 101, 998, 999, 2242-2245,2250-2253). But it only shows 9.

The following is the output of show vlan brief and show vtp status.

Does anyone know of the reason for this difference?



1    default                          active   
100  cust.sidradc.fwsmfo.01           active   
101  cust.sidradc.fwsmfo.02           active   
998  Native_vlan                      active   
999  Unused_vlan                      active    Te1/2/4, Te1/2/5, Te1/2/6, Te1/2/7, Te1/2/8, Gi1/5/1, Gi1/5/2, Gi1/5/3, Gi1/7/3
                                               Gi1/7/4, Gi1/7/5, Gi1/7/6, Gi1/7/7, Gi1/7/8, Gi1/7/9, Gi1/7/10, Gi1/7/11, Gi1/7/12
                                                Gi1/7/14, Gi1/7/15, Gi1/7/16, Gi1/7/17, Gi1/7/18, Gi1/7/19, Gi1/7/20, Gi1/7/21
                                                Gi1/7/22, Gi1/7/23, Gi1/7/24, Gi1/7/25, Gi1/7/26, Gi1/7/27, Gi1/7/28, Gi1/7/29
                                                Gi1/7/30, Gi1/7/31, Gi1/7/32, Gi1/7/33, Gi1/7/34, Gi1/7/35, Gi1/7/36, Gi1/7/37
                                                Gi1/7/38, Gi1/7/39, Gi1/7/40, Gi1/7/41, Gi1/7/42, Gi1/7/43, Gi1/7/44, Gi1/7/45
                                               Gi1/7/46, Gi1/7/48, Gi1/9/2, Gi1/9/3, Gi1/9/4, Gi1/9/5, Gi1/9/6, Gi1/9/7, Gi1/9/8
                                                Gi1/9/9, Gi1/9/10, Gi1/9/11, Gi1/9/12, Gi1/9/13, Gi1/9/14, Gi1/9/15, Gi1/9/16
                                                Gi1/9/17, Gi1/9/18, Gi1/9/19, Gi1/9/20, Gi1/9/21, Gi1/9/22, Gi1/9/23, Gi1/9/24
                                                Te2/2/4, Te2/2/5, Te2/2/6, Te2/2/7, Te2/2/8, Gi2/5/1, Gi2/5/2, Gi2/5/3, Gi2/7/1
                                               Gi2/7/3, Gi2/7/4, Gi2/7/5, Gi2/7/6, Gi2/7/7, Gi2/7/8, Gi2/7/9, Gi2/7/10, Gi2/7/11
                                                Gi2/7/12, Gi2/7/13, Gi2/7/14, Gi2/7/15, Gi2/7/16, Gi2/7/17, Gi2/7/18, Gi2/7/19
                                                Gi2/7/20, Gi2/7/21, Gi2/7/22, Gi2/7/23, Gi2/7/24, Gi2/7/25, Gi2/7/26, Gi2/7/27
                                                Gi2/7/28, Gi2/7/29, Gi2/7/30, Gi2/7/31, Gi2/7/32, Gi2/7/33, Gi2/7/34, Gi2/7/35
                                                Gi2/7/36, Gi2/7/37, Gi2/7/38, Gi2/7/39, Gi2/7/40, Gi2/7/41, Gi2/7/42, Gi2/7/43
                                               Gi2/7/44, Gi2/7/45, Gi2/7/46, Gi2/9/2, Gi2/9/3, Gi2/9/4, Gi2/9/5, Gi2/9/6, Gi2/9/7
                                                Gi2/9/8, Gi2/9/9, Gi2/9/10, Gi2/9/11, Gi2/9/12, Gi2/9/13, Gi2/9/14, Gi2/9/15
                                                Gi2/9/16, Gi2/9/17, Gi2/9/18, Gi2/9/19, Gi2/9/20, Gi2/9/21, Gi2/9/22, Gi2/9/23
                                                Gi2/9/24
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup
2242 cust.sidradc.wan.02              active    Gi1/7/1, Gi1/7/13, Gi2/7/48
2243 cust.sidradc.fwsm.01             active   
2244 cust.sidradc.wan.03              active   
2245 cust.sidradc.wan.04              active    Gi1/7/47
2250 cust.sidradc.lan.01              active   
2251 cust.sidradc.lan.02              active   
2252 cust.sidradc.lan.03              active   
2253 cust.sidradc.lan.04              active 


t3a.sidradc.core#sh vtp status
VTP Version                     : 3 (capable)
Configuration Revision          : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 9
VTP Operating Mode              : Transparent
VTP Domain Name                 : sidradc
VTP Pruning Mode                : Disabled (Operationally Disabled)
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Enabled
MD5 digest                      : 0x47 0x64 0x71 0x76 0x70 0xDA 0xEF 0x49
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
VTP version running             : 1



Thanks a lot

Gautam


Hi Gautam,


Your switch is confihured with vtp transperent mode and with version 1, When you set the VTP mode to transparent, then the switches do not participate in VTP. A VTP transparent switch will not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received messages. VLANS can be created, changed or deleted when in transparent mode. In VTP version 2, transparent switches do forward VTP messages that they receive out their trunk ports.


So it will only show the vla which are in vtp transparent mode .


Hope to help !!


If hepful do rate the post.


Ganesh.H

Correct Answer by Giuseppe Larosa about 7 years 4 months ago

Hello Gautam,


>> VTP Operating Mode              : Transparent


the switch is operating in transparent so its local vlan database can be different from what is present in VTP.

in other words you can create local vlans without seeing them advertised in VTP.


Hope to help

Giuseppe

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (2 ratings)
Loading.
Correct Answer
Giuseppe Larosa Sat, 02/13/2010 - 12:20
User Badges:
  • Super Silver, 17500 points or more
  • Hall of Fame,

    Founding Member

Hello Gautam,


>> VTP Operating Mode              : Transparent


the switch is operating in transparent so its local vlan database can be different from what is present in VTP.

in other words you can create local vlans without seeing them advertised in VTP.


Hope to help

Giuseppe

Correct Answer
Ganesh Hariharan Sat, 02/13/2010 - 22:35
User Badges:
  • Purple, 4500 points or more
  • Community Spotlight Award,

    Member's Choice, February 2016

Dear friends,


Please have a look at the following information on a 6500. I would expect that the "Number of Existing VLAN's" in show vtp status to show 12 (vlan 100, 101, 998, 999, 2242-2245,2250-2253). But it only shows 9.

The following is the output of show vlan brief and show vtp status.

Does anyone know of the reason for this difference?



1    default                          active   
100  cust.sidradc.fwsmfo.01           active   
101  cust.sidradc.fwsmfo.02           active   
998  Native_vlan                      active   
999  Unused_vlan                      active    Te1/2/4, Te1/2/5, Te1/2/6, Te1/2/7, Te1/2/8, Gi1/5/1, Gi1/5/2, Gi1/5/3, Gi1/7/3
                                               Gi1/7/4, Gi1/7/5, Gi1/7/6, Gi1/7/7, Gi1/7/8, Gi1/7/9, Gi1/7/10, Gi1/7/11, Gi1/7/12
                                                Gi1/7/14, Gi1/7/15, Gi1/7/16, Gi1/7/17, Gi1/7/18, Gi1/7/19, Gi1/7/20, Gi1/7/21
                                                Gi1/7/22, Gi1/7/23, Gi1/7/24, Gi1/7/25, Gi1/7/26, Gi1/7/27, Gi1/7/28, Gi1/7/29
                                                Gi1/7/30, Gi1/7/31, Gi1/7/32, Gi1/7/33, Gi1/7/34, Gi1/7/35, Gi1/7/36, Gi1/7/37
                                                Gi1/7/38, Gi1/7/39, Gi1/7/40, Gi1/7/41, Gi1/7/42, Gi1/7/43, Gi1/7/44, Gi1/7/45
                                               Gi1/7/46, Gi1/7/48, Gi1/9/2, Gi1/9/3, Gi1/9/4, Gi1/9/5, Gi1/9/6, Gi1/9/7, Gi1/9/8
                                                Gi1/9/9, Gi1/9/10, Gi1/9/11, Gi1/9/12, Gi1/9/13, Gi1/9/14, Gi1/9/15, Gi1/9/16
                                                Gi1/9/17, Gi1/9/18, Gi1/9/19, Gi1/9/20, Gi1/9/21, Gi1/9/22, Gi1/9/23, Gi1/9/24
                                                Te2/2/4, Te2/2/5, Te2/2/6, Te2/2/7, Te2/2/8, Gi2/5/1, Gi2/5/2, Gi2/5/3, Gi2/7/1
                                               Gi2/7/3, Gi2/7/4, Gi2/7/5, Gi2/7/6, Gi2/7/7, Gi2/7/8, Gi2/7/9, Gi2/7/10, Gi2/7/11
                                                Gi2/7/12, Gi2/7/13, Gi2/7/14, Gi2/7/15, Gi2/7/16, Gi2/7/17, Gi2/7/18, Gi2/7/19
                                                Gi2/7/20, Gi2/7/21, Gi2/7/22, Gi2/7/23, Gi2/7/24, Gi2/7/25, Gi2/7/26, Gi2/7/27
                                                Gi2/7/28, Gi2/7/29, Gi2/7/30, Gi2/7/31, Gi2/7/32, Gi2/7/33, Gi2/7/34, Gi2/7/35
                                                Gi2/7/36, Gi2/7/37, Gi2/7/38, Gi2/7/39, Gi2/7/40, Gi2/7/41, Gi2/7/42, Gi2/7/43
                                               Gi2/7/44, Gi2/7/45, Gi2/7/46, Gi2/9/2, Gi2/9/3, Gi2/9/4, Gi2/9/5, Gi2/9/6, Gi2/9/7
                                                Gi2/9/8, Gi2/9/9, Gi2/9/10, Gi2/9/11, Gi2/9/12, Gi2/9/13, Gi2/9/14, Gi2/9/15
                                                Gi2/9/16, Gi2/9/17, Gi2/9/18, Gi2/9/19, Gi2/9/20, Gi2/9/21, Gi2/9/22, Gi2/9/23
                                                Gi2/9/24
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup
2242 cust.sidradc.wan.02              active    Gi1/7/1, Gi1/7/13, Gi2/7/48
2243 cust.sidradc.fwsm.01             active   
2244 cust.sidradc.wan.03              active   
2245 cust.sidradc.wan.04              active    Gi1/7/47
2250 cust.sidradc.lan.01              active   
2251 cust.sidradc.lan.02              active   
2252 cust.sidradc.lan.03              active   
2253 cust.sidradc.lan.04              active 


t3a.sidradc.core#sh vtp status
VTP Version                     : 3 (capable)
Configuration Revision          : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 9
VTP Operating Mode              : Transparent
VTP Domain Name                 : sidradc
VTP Pruning Mode                : Disabled (Operationally Disabled)
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Enabled
MD5 digest                      : 0x47 0x64 0x71 0x76 0x70 0xDA 0xEF 0x49
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
VTP version running             : 1



Thanks a lot

Gautam


Hi Gautam,


Your switch is confihured with vtp transperent mode and with version 1, When you set the VTP mode to transparent, then the switches do not participate in VTP. A VTP transparent switch will not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received messages. VLANS can be created, changed or deleted when in transparent mode. In VTP version 2, transparent switches do forward VTP messages that they receive out their trunk ports.


So it will only show the vla which are in vtp transparent mode .


Hope to help !!


If hepful do rate the post.


Ganesh.H

gautamzone Sun, 02/14/2010 - 11:48
User Badges:

Thanks a lot Guislar and Ganesh for your kind responses

Actions

This Discussion