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New Member

Problem with Vlan



Can anyone try to help me.

I'm newbie using cisco router, i purchase this one CISCO1941-SEC/K9 to be a VPN server, but i can't make the router to connect to the internet.


I think the problem is because my ISP provider supplied the service with a GPON Terminal HG8012H, i search around for a solution, and i think that with the GPON terminal i only can use a router with Vlan.


Can anyone confirm this?

  • VPN

Hi Julio, On This case,

Hi Julio,


On This case, please go ahead and verify the following on your router:

1. Routes --> Gateway of last resort with next hope IP address <ISP modem>

2. Do you have NAT set up on your router? 

 for example: 

  access-list 102 permit ip <XXXXXX> any

XXXXX--> Inside subnets

   ip nat inside source list 102 interface FastEthernetX/X overload

FastEthernetX/X --> interface type 


Then do a tracert from an internal computer to check the hops and do it also from the router to any public IP address -->


take the output: show ip nat translations


so we can verify if the Inside hosts are being translating.


I checked information about this modem:



And It should work,


Let me know how it works out,


Please don't forget to rate and mark as correct the helpful Post!


David Castro,




New Member

Are you portuguese? I have a

Are you portuguese?


I have a fiber connection from vodafone wich as IPTV, VOIP and Internet, if i connect cisco to technicolor router wich is provided by vodafone internet connection works, but i need de 1941 to be a VPN server and using the technicolor i cant get that, i have been reading about it and i think internet connection on the GPON is programed to work only with vlan 100.


I'm stuck with this.


Thank you