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Hardware:

Cisco 2921 Router

Netgear GS752TXS Switch. Tags data with either Vlan1 (192.168.1.0/24) or Vlan2 (192.168.2.0/24) depending on mac address.

I want the cisco router to perform inter-vlan routing. The switch and the router will be connected with one cable on one interface.

I created sub-interfaces for the two VLANs on the router (Gi0/0.1) and (Gi0/0.2) and enabled dot1q encapsulation.

On the switch side if it were cisco, I would do:

interface gi0/0

switchport trunk encapsulation dot1q

switchport mode trunk

How do I do this on a netgear switch?

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i'm not very familiar with netgear devices. the config seems do be similar to HP Switches. You had to set the Interfaces Tagged or Untagged for the VLAN IDs. Example Port1 is connected to the Router:

  • set vlan1 UNTAGGED on Port 1 (it's the native Vlan; dot1q Frames are send in the native Vlan)
  • set all other Vlans you want to transport on this interface TAGGED on Port1

This is different to Cisco Trunks you had to specify each VLan you want to transport on the Trunk Link. I configured a few Trunks between Cisco and HP and this is the way how it works.

Have a look at:

http://documentation.netgear.com/gs108t/enu/202-10337-01/GS108T_UM-10-3.html

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  • Thank you for replying. Hmm I'm not sure what you mean. The switch is already tagging the data with the proper VLAN's. What I'm wondering is how I change the interface on the netgear switch that will connect to the router to a trunk port. (Or if that's even necessary). I will have a very brief window to test this so I want to get the config right before I do it. – Copy Run Start Feb 12 '13 at 17:03
  • If you tag multiple vlans on a port it will effectively create a trunk if the port on the opposite side is also tagging the same vlans. – NickW Feb 12 '13 at 17:30
  • a little more detail in my answer now – user1008764 Feb 12 '13 at 17:35
  • 2
    cisco and netgear have different meanings for the term trunk. For netgear it means port aggregation, cisco it means tagged for all vlans – JamesRyan Feb 12 '13 at 17:37
  • @JamesRyan This is exactly why I'm confused. The manual refers to trunking but it's really aggregation. User1008764: When you say "this is different to cisco trunks you had to specify each Vlans you want to transport on the Trunk Link" I don't know what you mean. On the cisco switch I just enable trunking and encapsulation. No need to specify the VLANs it will be passing. NickW: So you're saying as long as I tag multiple VLANs on the netgear's interface, it will work? – Copy Run Start Feb 12 '13 at 19:37

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