User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1 187/980
2.8.17.1 ATM Traffic Management on ASAP - PW Label Exp bits and scheduling type
The scheduling is performed by using the EXP bit in the PW label. The assignment is according to ATM
PW Cos as reported in the following table.
Table 33. PW label EXP bits
2.8.17.2 ATM Traffic Management on Modem card - Block biagram for ATM PW Flow policer
Figure 95. ATM Traffic Management on Modem card - Block diagram
– The CLASSIFIER provides to FLOW POLICER, for each ATM PW flow ((VLAN&MAC classification),
the 802.1p bits with the indication if the packet is in/out profile.
– FLOW POLICER, looking at the packet type, 802.1p bits and the filling status of queue, discards or
sends the ATM PW packet to HEADR COMPRESSION.
2.8.17.3 Support of ATMoMPLS Protocl Stack (with or without MPLS Tunnel Label
2.8.17.3.1 ATM PW over MPLS (ATMoMPLS)
In order to support inter-working of ATM PW Service with IP/MPLS network at least at datapath level, in
this release it will be supported the ATMoMPLS protocol stack referenced by RFC 4717, with the char
-
acteristics/limitation described in this paragraph.
For network deployment where both terminations of ATM traffic is carried out by MPR NEs, in order to save
radio bandwidth it will be possible to have the ATM PW Service using the ATMoMPLS protocol stack with
-
out the MPLS Tunnel Label.
ATM Service category EXP bits Scheduling type
CBR 110 Expedited
UBR+ 010 Best Effort
UBR 000 Best Effort
Drop packets
FLOW
POLICER
CLASSIFIER
HEADER
COMPRESSION
FQoS
FRAMER
Queue_filling_status
ATM Flow
Type
802.1p
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