Verifying Service Policies On Ip Sessions; Shaping And Queuing Per-Session Traffic On Lns - Cisco 10000 Series Configuration Manual

Shaping and Queuing Per-Session Traffic on LNS

Verifying Service Policies on IP Sessions

To verify service policies on IP sessions, enter any of the following commands in privileged EXEC
mode:
Command
show class-map type traffic
show policy-map type service
Shaping and Queuing Per-Session Traffic on LNS
The Per Session Shaping and Queuing on LNS feature provides the ability to shape (for example, transmit
or drop) or queue (for transmission later) the traffic from an Internet service provider (ISP) to an ISP
subscriber over a Layer 2 Tunneling Protocol (L2TP) Network Server (LNS). The outgoing traffic is shaped
or queued on a per-session basis.
Shaping and queueing traffic on a per-session basis:
•
•
Figure 18-1
In this simplified topology example:
1.
2.
3.
4.
Cisco 10000 Series Router Quality of Service Configuration Guide
18-24
Helps to avoid traffic congestion and allows the ISP to adhere to the Service Level Agreement (SLA)
established for managing traffic.
Provides a high degree of granularity for managing traffic on the network.
topology for per-session shaping and queuing on an LNS.
Per-Session Shaping and Queuing Topology—PPP Sessions Forwarded
ISP
LNS
L2TP tunnel
Downstream traffic is forwarded from the ISP (the source) to an ISP subscriber (the destination)
during a PPP session.
From an LNS at the ISP, the traffic is transmitted over an L2TP tunnel to an L2TP Access
Concentrator (LAC) and then to the subscriber.
Shaping and queuing the per-session traffic on an LNS can take into account the overhead between
the LNS, LAC, or E-DSLAM-to-CPE by using the user-defined overhead in the shape or bandwidth
command.
To specify the overhead offset in child and parent policies, use the bandwidth and shape
commands. The offset values and encapsulation types must match in the child and parent policies.
Chapter 18
Purpose
Displays traffic class maps and their matching criteria.
Displays the contents of Intelligent Service Gateway (ISG)
service policy maps and service profiles and session-related
attributes.
Downstream traffic
LAC
PPP session
Regulating and Shaping Subscriber Traffic
Figure 18-1 is a sample
Subscriber
OL-7433-09