>I'm trying to find out the performance implications of using secundary IP
>addresses on an ethernet interface (configuring "layer 3 VLANS"). From the
>looks of it, it seems packets are process switched... Anyone know about
>this? Any help would be appreciated.
>
>Francisco Muniz
>

Depends on the release. Until fairly recently, secondaries would 
default to the process switching path _unless_ you coded

          int e x
          ip route-cache same-interface
          ipx route-cache same-interface

With these command or commands (don't bother with IPX if you aren't 
using it!), the traffic will fast switch.  I believe that somewhere 
in IOS 12, fast switching became the default.

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