Solved: VTP status not showing the right number of existing vlans

gautamzone · ‎02-13-2010

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

Giuseppe Larosa · ‎02-13-2010

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

View solution in original post

Ganesh Hariharan · ‎02-13-2010

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

View solution in original post

Giuseppe Larosa · ‎02-13-2010

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

Ganesh Hariharan · ‎02-13-2010

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 · ‎02-14-2010

Thanks a lot Guislar and Ganesh for your kind responses