04-24-2008 12:16 PM - edited 03-05-2019 10:35 PM
I have a router and switch that I am trying to get setup with trunking and VTP. I believe the trunking is working but the output of some show commands makes me think otherwise. VTP is not working at all - both devices are in the same domain, using the same password but never exchange information.
Here is the router:
interface FastEthernet0/0
no ip address
speed 100
full-duplex
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
ip address 172.18.4.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 63.x.x0.9 255.255.255.252
ip nat outside
ip virtual-reassembly
no cdp enable
!
interface FastEthernet0/0.3
encapsulation dot1Q 3
ip address 20.x.x.183 255.255.255.0
ip nat outside
ip virtual-reassembly
no cdp enable
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 20.x.x.185 255.255.255.240
rate-limit output 1496000 1500000 1500000 conform-action transmit exceed-action drop
no cdp enable
!
interface FastEthernet0/0.11
encapsulation dot1Q 11
ip address 172.18.5.1 255.255.255.0
ip nat inside
ip virtual-reassembly
rate-limit input 2000000 2000000 2000000 conform-action transmit exceed-action drop
rate-limit output 2000000 2000000 2000000 conform-action transmit exceed-action drop
sh vtp status:
VTP Version : 2
Configuration Revision : 1
Maximum VLANs supported locally : 256
Number of existing VLANs : 9
VTP Operating Mode : Server
VTP Domain Name : TEST
VTP Pruning Mode : Enabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xBA 0xCB 0x9F 0xE0 0xC2 0x5D 0x21 0x3C
sh int trunk: <blank>
Here is the switch:
interface FastEthernet0
switchport mode trunk
duplex full
speed 100
!
interface FastEthernet1
switchport access vlan 2
!
interface FastEthernet2
switchport access vlan 3
!
interface Vlan1
ip address 172.18.4.2 255.255.255.0
sh vtp status:
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 8
Number of existing VLANs : 7
VTP Operating Mode : Client
VTP Domain Name : TEST
VTP Pruning Mode : Enabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xDA 0xCA 0x50 0xF0 0xAA 0x36 0xBF 0x67
sh int trunk:
Port Mode Encapsulation Status Native vlan
Fa0 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0 1-4094
Port Vlans allowed and active in management domain
Fa0 1-3
Port Vlans in spanning tree forwarding state and not pruned
Fa0 1-3
Solved! Go to Solution.
04-24-2008 03:41 PM
There is no vtp between a router and a switch when trunking unless the router has one of the multi port WIc switching modules installed . The commands are there if you have that installed but if you don't it really doesn't have any meaning. Between a router and a switch you are just forcing a trunk on and no vtp is used.
04-24-2008 03:41 PM
There is no vtp between a router and a switch when trunking unless the router has one of the multi port WIc switching modules installed . The commands are there if you have that installed but if you don't it really doesn't have any meaning. Between a router and a switch you are just forcing a trunk on and no vtp is used.
04-25-2008 07:32 AM
I just put in a 9 port POE switch WIC and there is still no VTP communication. It's just a router and switch setup so it's not that big a deal.
Any ideas why show int trunk is blank on the router?
04-24-2008 03:47 PM
Hello Michael,
Can you check whether you have correct VTP passwords on router/switch by doing a " sh vtp password "
if different you set both ends having the same password by " vtp password
[Edit] agreeing with glen, assuming that you are trying VTP on VTP supported switch modules or certain models like 7600 series
HTH
Padmanabhan
04-25-2008 06:25 AM
I checked the passwords about 20 times so I know I at least have that correct. :)
Glen's answer is what I was not hoping to hear but oh well.
Thanks for the help guys.
04-25-2008 07:34 AM
Is f0/0 part of that wic module ? If so then the setup may not be correct.
04-25-2008 07:38 AM
F0/0 is not part of the WIC module. It is just a built in fast Ethernet port.
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