Route table growth and hardware to the filter

Jon Lewis jlewis at
Fri Sep 21 11:52:28 UTC 2007

On Fri, 21 Sep 2007, Lincoln Dale wrote:

>> No, but someone previously posted that with later software versions, when
>> TCAM runs out, packets for those routes that fit in TCAM are hardware
>> switched, and only traffic for the remaining routes that didn't fit are
>> software switched.
> that would have been me.  and the comments on the logic still stand (as
> correct) provided you are running the appropriately non-ancient release of
> code.

Do you know in what version this behavior was changed?  At the very least, 
people are going to want to upgrade IOS, as it'll likely mean the 
difference between slightly increased MSFC CPU and a switch that can't 

  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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