Trunking at Router Port

Posted by singh on Server Fault See other posts from Server Fault or by singh
Published on 2012-10-09T09:22:31Z Indexed on 2012/10/09 9:39 UTC
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vlan

After reading a bit about interVLAN routing got a doubt regarding how trunking takes place at router and at switch.In case of switch we configure a port interface as trunk port and say all vlan's are allowed here but in case of router we configure sub interface as trunk saying particular vlan belongs to particular subinterface .Can't we configure only a single port interface on router just like Switch and say all vlan's are allowed here on this interface ,why to go for sub interfaces?

Hope I'm able to put my question in right way.

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