Transmit Connect Speed Calculation Methods; Static Layer 2 - Juniper JUNOSE SOFTWARE 11.0.X - BROADBAND ACCESS CONFIGURATION GUIDE 4-1-2010 Configuration Manual

Transmit Connect Speed Calculation Methods

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:
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.
"Using AAA Default Tunnel Parameters to Configure the Transmit Connect Speed
Calculation Method" on page 400.
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 400.
Static layer 2
Dynamic layer 2
QoS
Actual (lesser of dynamic layer 2 or QoS)
Configuring the Transmit Connect Speed Calculation Method
Chapter 13: Configuring an L2TP LNS
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