
Using Protocol Prioritization Queues
308645-15.0 Rev 00
2-5
The amount of actual data transmitted depends on the clock speed of the circuit.
You can configure the clock speed on a synchronous interface by setting the
External Clock Speed parameter in the Configuration Manager Edit Sync
Parameters window. (See Configuring WAN Line Services.)
The bandwidth allocation algorithm works as follows:
1.
The transmit queue scans the High queue.
If there is no traffic in the High queue, the algorithm proceeds to step 3.
2.
The router empties all packets from the High queue, up to the configured
bandwidth percentage, into the transmit queue and then transmits the packets.
The default bandwidth percentage for the High queue is 70 percent. If the
actual bandwidth use is less than the limit, the router empties the High queue
and proceeds to the Normal queue.
3.
The transmit queue scans the Normal queue.
If there is no traffic in the Normal queue, the algorithm proceeds to step 5.
4.
The router empties all packets from the Normal queue, up to the configured
bandwidth percentage, into the transmit queue and then transmits the packets.
The default bandwidth percentage for the Normal queue is 20 percent. If the
actual bandwidth use is less than the limit, the router empties the Normal
queue and proceeds to the Low queue.
5.
The transmit queue scans the Low queue.
If there is no traffic in the Low queue, the algorithm returns to step 1.
6.
The router empties all packets from the Low queue, up to the configured
bandwidth percentage, into the transmit queue and then transmits the packets.
The default bandwidth percentage for the Low queue is 10 percent. If the
actual bandwidth use is less than the limit, the router empties the Low queue.
7.
The algorithm returns to step 1.
Figure 2-2 illustrates the bandwidth allocation algorithm.
Commentaires sur ces manuels