service-policy output CE-EDGE
!
labeled MPLS packets (on the PE-to-P links). For the PE-CE link, IP Precedence and LLQ is used. The
PE router also provides traffic shaping, but not packet reclassification (which is performed prior to
entrance into the carrier MPLS network). IOS 12.2T (or later) is required to provide for multiple classes
of service on each VRF interface and to be able to use a non-MPLS ATM network.
IP Precedence setting of the incoming packet mapped to that label field. So for frame mode, all of
the modular QoS CLI functions are available to police and queue traffic based on the EXP bits.
classification field. It is simply the assigned VPI/VCI label, which include the 3 bits that indicate
one of four labeled virtual circuits.
mapping from the class-of-service (gold, silver, bronze) to a per-virtual circuit queuing mechanism on
the egress interface. If there are no P routers and the MPLS backbone is simply a mesh of PVCs, then
there must either be a per-virtual circuit queuing mechanism or the ability to map different classes of
service to virtual circuits with different shaping characteristics (PCR, etc.) or service guarantees (CBR,
VBR-nrt, VBR-rt, etc.).
CBWFQ to be applied to that virtual circuit. Routers can alternatively use up to 4 virtual circuits for each
destination, using a classification based on the low-order 2 bits of the EXP filed at the ingress to the cell
MPLS network. This limit of 4 virtual circuits requires additional planning of the classes supported
within the EXP bits as there are now only 4 classes (reduced from the 8 available via the 3 EXP bits).