Can we Create interace vlanx on router say 3640

[sjallaluddin]

Hi,

Could any one tell me can we create "interface vlanx on router, if so what would be the use/function to create this interface on a router rather then a switch

SKH

[paddyxdoyle]

Hi,

You can trunk VLANs to a 3600 series router.

This would enable you to route between your VLANs and give you the ability to apply some kind of layer 3 filtering.

The reason you might want to do this is if you didn't have a layer 3 capable switch yet wanted to deploy multiple VLANs on your switches for example VLAN 2 for users, and VLAN3 for servers. By trunking these VLANs to the router you could:

A) route between the VLANs

B) Apply some kind of filtering to give restricted access to certiain kinds of servers.

This kind on config is actually called "router on a stick"

HTH

PD

[frenzeus]

Hi sk,

Routers such as the 3640 does not allow u to actually create virtual interfaces for intervlan routing. Instead, u would have to create sub-interfaces under the fastethernet interface, and with the right sets of commands configured on it, thus intervlan routing can be done between the sub-interfaces.

Interface Vlan "X", which is also known as SVIs (Switched Virtual Interfaces) can be created on switches, eq. 3550, 4500, 6500. For the purpose of intervlan routing, u would need at least a 3550 and above with the proper Enterprise IOS.

Hope it helps.