The name 'sprouting' is a misnomer, as there is no real routing happening (i.e. 
routes are not learned by way of advertising).IIRC, the way the shortest paths 
are learned with this component is by first flooding unrecognized packets. So 
if it drops the packets then the flow tables will never actually get populated 
with flow entries. When the description says that it "sets up a shortest path 
route from source to destination", what is meant is that it finds out where the 
destination is (by querying another module that keeps track of that) and sets 
up flow entries on the switches between the two. 


On Jul 23, 2012, at 2:36 PM, 王健 <[email protected]> wrote:

> Hello guys:
>        "Default routing component.  Listens for Flow_in_events and sets up 
> shortest path route from source to destination.  If no route betweent the 
> access point datapaths exists, broadcasts packet."  The sentence i saw in 
> src\nox\netapps\routing\sprouting.hh. My Question is why not drop this packet 
> if there is no route?
>                                                                               
>                                                                       &n bsp; 
>                Wang Jian
>                                                                               
>                                                                               
>          2012-7-23
> 
> 

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