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The G.shdsl WAN Interface Cards for the Cisco 2600 and 3700 provide support for ATM Class of Service (CoS)
(CBR, VBR-nrt, VBR-rt, and UBR) features that enable service providers to manage their core ATM network
infrastructures to deliver scalable, cost-effective services with CoS guarantees to their customers.
Permanent-virtual-circuit (PVC) traffic shaping and queuing allow further optimization of the existing bandwidth
between customers and various services.
Congestion Avoidance
• Class-Based Weighted Random Early Detection (WRED) with DSCP (Egress)
Policing and Traffic Shaping
• Class-Based Policing
• Per-ATM VC shaping for VBR—nrt
• ATM Cell Loss Priority (CLP) Bit Marking
1
Link Efficiency
• Selectable Transmit Ring Setting of 3 or 24 packets
• Tunable Tx Ring Buffer for values 2 through 60
1
• Multilink Point-to-Point Protocol (MLPPP) fragmentation with interleaving (LFI)
• Multilink Point-to-Point Protocol (MLPPP) with LLQ, CBWFQ, and other QoS features
1
• Compressed Real-Time Transport Protocol (cRTP)
1
Other (IP QoS)
• Local Policy Routing (LPR)
• Policy-Based Routing (PBR)
• IP QoS map to ATM Class of Service
1. Supported in Cisco IOS 12.3(2)T or later. Please refer to the following URL or contact your local Cisco representative for more details:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122y/122yn8/ft_ipqos.htm
Table 1 Supported IP QoS features
Classification and Marking