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SI2000 Callisto821+ Router Users Guide 

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 ID  |  Name     

-----|-------------------- 

   1 |  defwan     

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To create new scheduler profile type scheduler add profile <ProfileName> priority to create priority based 
scheduling profile where <ProfileName> is the name of scheduler profile. 
 

--> scheduler add profile defwan priority 

 
To create weighted fair queuing scheduler profile type scheduler add profile <ProfileName> wf2qplus.  
 

--> scheduler add profile defwan wf2qplus 

 

Priority based queuing will basically always serve the queue with highest priority. Only if the one with the 
highest priority does not contain any packets the mechanism will start serving lower priority queue. This can 
apparently lead to lower priority queue starvation. On the other hand, wf2qplus algorithm will give certain 
queue only as much bandwidth as configured by it's weight. Weights are defined as percent of the 
bandwidth.  
 
In the example bellow packets are arriving in the system as shown on the first picture. Queue 7 has most 
packets. 

 
 
If priority based mechanism will be used (picture on the left), all packets from queue 7 will be sent before any 
packet from queue 6 will be sent. This is good enough for some applications while it is not for others 
 

 

 

 

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