Single trunk link for all VLANs

Single trunk link for all VLANs
This solution uses only one router interface on the router, but it also puts all the traffic on
one interface. You really have to have a fast router to do this. Also, to even perform this function,
you need, at minimum, a FastEthernet interface on a 2600 series router. ISL does not work
on 10BaseT interfaces, nor would you want to run this on 10BaseT because it is processor- and
bandwidth-intensive.