SonicWALL TZ 190 Manuale Utente

The above diagram shows 4 policies are configured for OBWM with a link capacity of 100 Kbps. 
This means that the link capacity is 12800 Bytes/sec. Below table gives the BWM values for 
each rule in Bytes per second.

For GBW processing, we start with the first queue in the rule queue list which is FTP. 
Link credit is 12800 and class credit is 1280. Pkt1 of 400B is sent out on the WAN link 
and link credit becomes 12400 and class credit becomes 880. Pkt2 is not sent out 
because there is not enough class credit to send 1500 Bytes. The remaining class 
credit is carried over to the next time slice.

We move on to the next rule queue in this list which is for H323. Pkt1 of 1500B is sent 
out and link credit becomes 10900 and class credit for H323 becomes 1060. Pkt2 is 
also sent from queue hence link credit = 10200 and class credit = 360. Pkt3 is not sent 
since there is not enough class credit. The remaining class credit is carried over to the 
next time slice.

Now we move onto Yahoo Messenger queue. Since Pkt1 cannot be accommodated 
with its class credit of 640 Bytes, no packets are processed from this queue. However, 
its class credit is carried over to the next time slice.

From VNC queue, Pkt1 and Pkt2 are sent out leaving link credit = 8000 and class credit 
= 360. Class credit is carried over.

Since all the queues have been processed for GBW we now move onto use up the left 
over link credit of 8000.

GBW

1280

2560

640

2560

MBW

2560

5120

1920

3200