05-16-2014 02:15 PM - edited 03-01-2019 02:46 PM
05-16-2014 07:29 PM
05-17-2014 03:41 AM
By inner vlans ,he means vlans on 1 switch.
05-27-2015 05:08 PM
Thank you all for your response. Sorry I didn't see them until now!
The switch is a Layer 3 switch model 3750. All vlans will have Internet access until you create a ACL to restrict access. My issue was with NAT and that I simply added a router to the mix. I initially thought I can just hookup to the ISP router, but didn't work for my setup.
05-27-2015 11:52 PM
On L3 switch, enable "ip routing"
Put a default route towards modem/router. Use L3 port for connection in-between
NATing will be done on modem/router since 3750 doesn't support NAT
On modem, add routes for your LAN subnets towards the 3750.
On modem/router, you need to change the LAN ip pool to your vlan IPs. Here note that many modems support only one LAN pool.
05-17-2014 03:43 AM
I think you also need to map all those switch ports on the 3 VLANs to a routed port on the switch, inorder to allow the users on the 3 VLANs to access internet.
05-17-2014 08:01 PM
Hi dear claudiochiappetta
As per my understanding , 1) routed port with ip address connecting to internet link , with default route pointing to nexthop.
2) your users port in respective vlan , nothing else is required for allowing them to access to internet ,
But NAT will be required if your Lan ip not natted on Modem , / what kind of ip you are using on modem link , and for vlan users ?i guesss you could explain in more detail that could help .
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