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Frame Relay for Voice over IP Configuration Example<br />

In Cisco IOS Release 11.3, Frame Relay Traffic Shaping is not compatible with RSVP. We suggest<br />

one of the following workarounds:<br />

• Provision the Frame Relay PVC to have the CIR equal to the <strong>port</strong> speed.<br />

• Use Generic Traffic Shaping with RSVP.<br />

Frame Relay for Voice over IP Configuration Example<br />

For Frame Relay, it is customary to configure a main interface and several subinterfaces, one<br />

subinterface per PVC. The following example configures a Frame Relay main interface and a<br />

subinterface so that <strong>voice</strong> and data traffic can be successfully trans<strong>port</strong>ed:<br />

interface Serial0/0<br />

mtu 300<br />

no ip address<br />

encapsulation frame-relay<br />

no ip route-cache<br />

no ip mroute-cache<br />

fair-queue 64 256 1000<br />

frame-relay ip rtp hea<strong>de</strong>r-compression<br />

interface Serial0/0.1 point-to-point<br />

mtu 300<br />

ip address 40.0.0.7 255.0.0.0<br />

ip rsvp bandwidth 48 48<br />

no ip route-cache<br />

no ip mroute-cache<br />

bandwidth 64<br />

traffic-shape rate 32000 4000 4000<br />

frame-relay interface-dlci 16<br />

frame-relay ip rtp hea<strong>de</strong>r-compression<br />

In this configuration example, the main interface has been configured as follows:<br />

• MTU size is 300 bytes.<br />

• No IP address is associated with this serial interface. The IP address must be assigned for the<br />

subinterface.<br />

• Encapsulation method is Frame Relay.<br />

• Fair-queuing is enabled.<br />

• IP RTP hea<strong>de</strong>r compression is enabled.<br />

The subinterface has been configured as follows:<br />

• MTU size is inherited from the main interface.<br />

• IP address for the subinterface is specified.<br />

• Bandwidth is set to 64 kbps.<br />

• RSVP is enabled to use the <strong>de</strong>fault value, which is 75 percent of the configured bandwidth.<br />

• Generic traffic shaping is enabled with 32 kbps CIR where Bc=4000 bits and Be=4000 bits.<br />

• Frame Relay DLCI number is specified.<br />

• IP RTP hea<strong>de</strong>r compression is enabled.<br />

Configuring Voice over IP for the Cisco 3600 Series 2-13

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