Hello Ilangovan,
I made a search using feature navigator
http://www.cisco.com/go/fn
I used search by platform specifying 1841 then feature set ip base release 12.4(10)
among the listed features there is:
Vlan range
description
This is to ease configuration of enabling the VLAN configurations on a range of sub-interfaces
So it looks like it supports it
Hope to help
Giuseppe
