Transmit Connect Speed Calculation Methods; Static Layer 2 - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - BROADBAND ACCESS CONFIGURATION GUIDE 2010-10-12 Configuration Manual

JunosE 11.3.x Broadband Access Configuration Guide

Transmit Connect Speed Calculation Methods

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transmit connect speed calculation method. For instructions, see "Using AAA Default
Tunnel Parameters to Configure the Transmit Connect Speed Calculation Method" on
page 403.
RADIUS Include the Tunnel-Tx-Speed-Method RADIUS attribute (Juniper Networks
VSA 26-94) in RADIUS Access-Accept messages. For instructions, see "Using AAA
Default Tunnel Parameters to Configure the Transmit Connect Speed Calculation
Method" on page 403.
In previous releases, the router calculated the transmit speed of the subscriber's access
interface based only on statically configured settings for the underlying layer 2 access
interface. With this feature, you can obtain a more accurate representation of the transmit
connect speed by choosing a calculation method that reflects changes to the layer 2
interface due to statically configured settings, dynamically configured settings, or QoS
settings.
You can choose one of the following methods for calculating the transmit connect speed
that is reported in L2TP Transmit (TX) Speed AVP 24:

Static layer 2

Dynamic layer 2
QoS
Actual (lesser of dynamic layer 2 or QoS)
The following sections describe each of these calculation methods.
NOTE: Configuring the transmit connect speed calculation method has no
effect on the operation of the L2TP Receive (RX) Speed AVP 38 or the
Connect-Info RADIUS attribute [77] at the LAC.
Static Layer 2
The static layer 2 method calculates the transmit connect speed of the subscriber's
access interface based on the statically configured settings for the underlying layer 2
ATM 1483 or Ethernet interface. The static layer 2 method does not reflect changes to
the transmit speed of the layer 2 interface due to dynamically configured settings or to
QoS.
For ATM 1483 circuits, the static layer 2 value is based on the bandwidth that the
connection requires. The router uses certain traffic parameters for each service category
to determine the required bandwidth for the connection. For more information about
how the router computes bandwidth for ATM 1483 circuits, see the Connection Admission
Control section in JunosE Link Layer Configuration Guide .
For Ethernet VLANs, the static layer 2 value is the advisory transmit speed of the VLAN
subinterface, if configured with the vlan advisory-tx-speed command, or the speed of
the underlying physical port if the advisory transmit speed is not configured.
Copyright © 2010, Juniper Networks, Inc.