jgrammer42
asked on
Cisco 3560 switches not seeing VTP V3
I have setup VTP on Cisco switches dozens of time, but these two switches have me stumped. And I am SURE I am just not seeing my configuration error, so I just need another set of eyes.
I have two Cisco 3560 switches.
They are connected together through port interface GigabitEthernet 1/1 on both switches.
After configuring both switches and typing the command #show vtp devices
I get a return message of "No VTP3 devices found"
Here is the VTP configuration on the server switch (3560-A)
interface GigabitEthernet1/1
description LAN connection to 3560-B.
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20,30
switchport mode trunk
Here is the VTP configuration on the client server switch (3560-B)
interface GigabitEthernet1/1
description LAN connection to 3560-A.
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20,30
switchport mode trunk
Here is the VTP status of each switch:
3560-A (VTP Server)
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : eTest
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 70ca.9d55.3a80
Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 9
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
3560-B (VTP client)
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : eTest
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 503d.a542.df80
Feature VLAN:
--------------
VTP Operating Mode : Client
Number of existing VLANs : 8
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
VTP Password is : cisco123 on both switches
Does anyone see my configuration error?
Thank you in advance,
Jeff
I have two Cisco 3560 switches.
They are connected together through port interface GigabitEthernet 1/1 on both switches.
After configuring both switches and typing the command #show vtp devices
I get a return message of "No VTP3 devices found"
Here is the VTP configuration on the server switch (3560-A)
interface GigabitEthernet1/1
description LAN connection to 3560-B.
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20,30
switchport mode trunk
Here is the VTP configuration on the client server switch (3560-B)
interface GigabitEthernet1/1
description LAN connection to 3560-A.
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20,30
switchport mode trunk
Here is the VTP status of each switch:
3560-A (VTP Server)
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : eTest
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 70ca.9d55.3a80
Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 9
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
3560-B (VTP client)
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : eTest
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 503d.a542.df80
Feature VLAN:
--------------
VTP Operating Mode : Client
Number of existing VLANs : 8
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
VTP Password is : cisco123 on both switches
Does anyone see my configuration error?
Thank you in advance,
Jeff
ASKER
Hello SIM50.
Yes, they are on both sides, and traffic is flowing beautifully. I have NO problems with passing packets over the trunk ports. Just that one problem with VTP.
Here are the sh int trunk command results
3560-A (VTP Server) (I have other trunk ports on this switch but the Gig1/1 is the only one connected to a switch)
Port Mode Encapsulation Status Native vlan
Gi0/22 on 802.1q trunking 1
Gi0/24 on 802.1q trunking 1
Gi1/1 on 802.1q trunking 10
Port Vlans allowed on trunk
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
Port Vlans allowed and active in management domain
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
Port Vlans in spanning tree forwarding state and not pruned
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
3560-B (VTP client)
Port Mode Encapsulation Status Native vlan
Gi1/1 on 802.1q trunking 10
Port Vlans allowed and active in management domain
Gi1/1 10,20,30
Port Vlans in spanning tree forwarding state and not pruned
Gi1/1 10,20,30
Yes, they are on both sides, and traffic is flowing beautifully. I have NO problems with passing packets over the trunk ports. Just that one problem with VTP.
Here are the sh int trunk command results
3560-A (VTP Server) (I have other trunk ports on this switch but the Gig1/1 is the only one connected to a switch)
Port Mode Encapsulation Status Native vlan
Gi0/22 on 802.1q trunking 1
Gi0/24 on 802.1q trunking 1
Gi1/1 on 802.1q trunking 10
Port Vlans allowed on trunk
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
Port Vlans allowed and active in management domain
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
Port Vlans in spanning tree forwarding state and not pruned
Gi0/22 10,20,30
Gi0/24 10,20,30
Gi1/1 10,20,30
3560-B (VTP client)
Port Mode Encapsulation Status Native vlan
Gi1/1 on 802.1q trunking 10
Port Vlans allowed and active in management domain
Gi1/1 10,20,30
Port Vlans in spanning tree forwarding state and not pruned
Gi1/1 10,20,30
have you tried debug vtp?
Could it be because you are missing primary vtp server?
Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 9
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 9
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 255
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
ASKER
Hi Shark Attack,
No I have not. However, what that suggestion tells me is that you do not see anything wrong with my configuration. Which is where I though the problem was.
I am not all that keen on the Cisco debugger...it is not very user friendly. But I will try turn it on for "events" and see if anything is there.
No I have not. However, what that suggestion tells me is that you do not see anything wrong with my configuration. Which is where I though the problem was.
I am not all that keen on the Cisco debugger...it is not very user friendly. But I will try turn it on for "events" and see if anything is there.
ASKER
SIM50,
You may be on to the problem there. I had not seen that. However, I do not know even where to set that. I have never had to hard code that previously. One you enter "vtp mode server vlan", I have always seen it just pick up the Primary ID from the Device ID.
Do you know the CLI to hard set that?
BTW, I am running c3560e-ipbasek9-m version 15.0(2)SE8 of the IOS
Thank you,
You may be on to the problem there. I had not seen that. However, I do not know even where to set that. I have never had to hard code that previously. One you enter "vtp mode server vlan", I have always seen it just pick up the Primary ID from the Device ID.
Do you know the CLI to hard set that?
BTW, I am running c3560e-ipbasek9-m version 15.0(2)SE8 of the IOS
Thank you,
ASKER CERTIFIED SOLUTION
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ASKER
SIM50,
I get an error on that command. "vtp primary vlan" is NOT available as a command with the latest version of IOS I am using apparently.
3560-A(config)#vtp primary vlan
^
% Invalid input detected at '^' marker.
3560-A(config)#vtp ?
domain Set the name of the VTP administrative domain.
file Configure IFS filesystem file where VTP configuration is stored.
interface Configure interface as the preferred source for the VTP IP updater
address.
mode Configure VTP device mode
password Set the password for the VTP administrative domain
pruning Set the administrative domain to permit pruning
version Set the administrative domain to VTP version
3560-A(config)#
I get an error on that command. "vtp primary vlan" is NOT available as a command with the latest version of IOS I am using apparently.
3560-A(config)#vtp primary vlan
^
% Invalid input detected at '^' marker.
3560-A(config)#vtp ?
domain Set the name of the VTP administrative domain.
file Configure IFS filesystem file where VTP configuration is stored.
interface Configure interface as the preferred source for the VTP IP updater
address.
mode Configure VTP device mode
password Set the password for the VTP administrative domain
pruning Set the administrative domain to permit pruning
version Set the administrative domain to VTP version
3560-A(config)#
In exec modenot in the config mode
ASKER
SIM50,
Sorry, I did not realize where I was. As you can see from the sh vtp stat, the Primary ID is now set.
That DID fix my issue!
I had not had to set that parm before. But once I did, the sh vtp devices DO show up.
Thank you!
Sorry, I did not realize where I was. As you can see from the sh vtp stat, the Primary ID is now set.
That DID fix my issue!
I had not had to set that parm before. But once I did, the sh vtp devices DO show up.
Thank you!
ASKER
This solution fixed the problem 100%. Thank you SIM50!
Anytime.
sh int trunk