Panasonic NN46240-501 - Manual (Page 42)

1 Product overview
Nortel Secure Router 8000 Series
Configuration Guide - Basic Configuration
Traffic policing
The Secure Router 8000 Series supports parameters such as the committed rate, the peak rate,
the committed burst size, and the maximum burst size for every type of flow according to the
Service Level Agreements (SLA). For traffic beyond the SLA, the router can pass or drop the
flow.
Traffic policing does not influence the forwarding performance of a device because a
hardware coprocessor is used internally to implement the Committed Access Rate (CAR).
Congestion management
The Secure Router 8000 Series uses the Weighted Random Early Detection (WRED)
congestion control mechanism. The Secure Router 8000 Series can configure individual
congestion control algorithms for each priority queue on the port.
Traffic shaping
The Secure Router 8000 Series uses the Generic Traffic Shaping (GTS) algorithm to buffer
packets, to avoid the congestion of downstream devices, and to reduce the drop of packets.
The Secure Router 8000 Series supports shaping for services like Expedited Forwarding ( EF)
and Assured Forwarding ( AF) to smooth the transmission rate of Di^-Serv services to the
downstream tragic.
Traffic classification
The Secure Router 8000 Series supports simple and complex tragic classification.
If no QoS guarantee or traffic classification is required, or if there are no rules to match
packets after traffic classification, the device processes the packets with the Best-Effort (BE)
VPN QoS
FR QoS
service.
As a QoS Policy Propagation through the Border Gateway Protocol (QPPB) policy, VPN QoS
can transmit private network routes through BGP, which extends the QoS Policy Propagation
through the Border Gateway Protocol (QPPB) application in the Layer 3 VPN environment.
VPN QoS can be applied to VPN instances and VPNv4.
When VPN QoS is applied to the private network route of a specific VPN instance, the
inbound and outbound route policy should be applied to the VPN instance. If VPN QoS is
applied to the private network route of all VPN instances, the inbound and outbound route
policy should be applied to the VPNv4 neighbors of BGP.
Frame Relay (FR) has its own QoS that can be configured with Permanent Virtual Paths( PVCs)
to provide flexible services for customers.
The Secure Router 8000 Series supports multiple FR QoS technologies like FRTS, FRTP, FR
congestion management, FR queue management, and FR fragmentation.
1-16 Nortel Networks Inc. Issue 5.3 (15 January 2009)