However, to support specific customer requirements, assume that you might want to forward all VoIP traffic along the less congested but higher cost IGP metric path from R1 to R4 to R3. You can accomplish this model by configuring filter-based forwarding on R1 to forward all VoIP traffic that is addressed to specific hosts downstream of R3 to a next hop of R4 rather than to R2. Filter-based forwarding is another mechanism for controlling the flow of subscriber traffic in service provider networks. Inc. All rights reserved. Inc. All other trademarks, service marks, registered trademarks, or registered service marks may be the property of their respective owners.
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