Network Configuration Concepts
phones, only 50 PPS goes one way and 50 PPS in the return direction. Throughput is 100 PPS.
In the following figure, the router has a port handling capacity of 15,000 PPS. Throughput is
half this number; i.e. 7500PPS.
Figure 34: Packet-per-second throughput example
NETWORK TOPOLOGY WITH PRIORITY
The following network diagram highlights the use of the dual-port phones and the configuration
of a network including VLAN priority and also the use of DiffServ/TOS in the WAN connection.
Figure 35: Network Topology with Priority
In Figure 35, the network switch ports connected to the dual-port phones must be able to accept
both untagged and tagged information. The untagged data is translated to a data VLAN (1). In
this case, VLAN1 is also the default or native VLAN. The voice is destined for a voice VLAN (2).
In the outgoing direction, these ports must also pass information from the voice VLAN still
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