Backbone Diffserv Configuration (3)
Most backbone Diffserv deployments today use a static relative bandwidth allocation scheme, e.g.:
VoIP class queue – serviced with priority up to some max. % of b/w, e.g. 25%
Business class queue – gets majority (e.g. 90%) of remaining b/w, e.g. 67%
Best Effort queue – gets whatever is left, e.g. 7%
Backbone is dimensioned to avoid congestion for the majority of the time
When congestion happens VoIP is preserved over Business, which is preserved over BE