There is only one ethernet port on the router. Is it possible to have one port present in both VLANs? So that both VLANs can see the router but keep the 2 networks totally separate.
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3COM VLAN Bridging on Switch 3300
I need to have 2 networks to connect to a Cisco 2600 router (for internet access)using a 3COM Switch 3300. Both networks must remain invisible to each other but be able to see the router. I am trying to setup 2 VLANs for this and I believe I need to use VLAN tagging. My question is - do all the client NICs on the 'tagged' VLAN need to support 802.1q or is it just the switch that they are connected to has to support 802.1q? ALso does the Cisco 2600 router support 802.1q tagging?
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Answers
Cisco 2600 with IP Plus (minimum release n° 12.0(3)T2) supports VLAN tagging.
Having one port present in both VLANs is exactly what tagging is about. If VLAN tagging would not be supported you would need two ports in your router with each port connected to a separate VLAN.
Also consider that if both networks must remain invisible you will need to add an access list in the Cisco in order to avoid routing between the VLANs. You'll also need to configure two IP interfaces on the Cisco ethernet port.
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by: geoffrynPosted on 2001-12-17 at 09:01:15ID: 6681198
Only the switch needs to support VLAN tagging. You simply assign ports to the VLANs. The router does not understand VLANs. How many ports are on you router?