I agree with Martin that normally a trunk is allow all VLANs to be carried. You can verify this on the switch using the command show interface trunk.
Martin asks a good question about whether the router interface is configured as a trunk. The switch trunk will have VLAN 1 as the native VLAN and send untagged frames for VLAN 1 while all frames for VLANs 60 and 100 will be tagged frames. Without dot1Q processing specified on the router interface it will not be able to process these VLANs.
thanks for your reply, the trunking has been configured on the router, included a snapshot of the router config. Initially there was already trunk port working as VLAN100 was existing and thats working, it was only vlan 60 thats recently been added and its not working.
Was there any issues with the switch configurations that I posted before?
interface FastEthernet0/1.1 description LAN encapsulation dot1Q 1 native ip address 172.25.87.133 255.255.255.252 secondary ip address 10.10.120.254 255.255.255.0 ip helper-address 10.10.20.40 ip helper-address 10.30.10.21 ip helper-address 10.10.120.2 service-policy input PM-CLASSIFY-IN ! interface FastEthernet0/1.60 encapsulation dot1Q 60 ip address 10.60.120.254 255.255.255.0 service-policy input PM-CLASSIFY-IN ! interface FastEthernet0/1.100 encapsulation dot1Q 100 ip address 10.20.120.1 255.255.255.0 service-policy input PM-CLASSIFY-IN !
Thanks for providing the router configuration of the interfaces that are trunking. I do not see any obvious problems with the router config or with the switch config. Would you post the output of show ip interface brief from the router and the output of show interface trunk from the switch?
I am curious about your comment that vlan 100 already existed and worked. In the switch config it is the voice vlan. Was it always the voice vlan? If vlan 60 is recently created what was the data vlan on the switch interfaces before?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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