Table 70: Transmit Connect Speeds For L2Tp Over Atm 1483 Example; Table 71: Transmit Connect Speeds For L2Tp Over Ethernet Example; Example 2: L2Tp Session Over Ethernet Vlan Interface - Juniper JUNOSE SOFTWARE 11.0.X - BROADBAND ACCESS CONFIGURATION GUIDE 4-1-2010 Configuration Manual
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A transmit connect speed of 10 Mbps is provided dynamically from a RADIUS
authentication server when the subscriber logs in.
The transmit connect speed calculated by QoS is 5 Mbps.
Based on these characteristics, Table 70 on page 397 lists the transmit connect speed
value reported in L2TP Transmit (TX) Speed AVP 24 for each calculation method,
and the reason why L2TP reports this value.
Table 70: Transmit Connect Speeds for L2TP over ATM 1483 Example
Transmit Connect
Calculation
Speed Reported in
Method
AVP 24
Static layer 2
155 Mbps
Dynamic layer 2
10 Mbps
QoS
5 Mbps
Actual
5 Mbps
Example 2: L2TP Session over Ethernet VLAN Interface
In this example, an L2TP session is established over a PPPoE subinterface over an
Ethernet VLAN subinterface. The configuration has the following characteristics:
The Ethernet VLAN subinterface is configured with an advisory transmit speed
of 100 Mbps.
The dynamic layer 2 setting does not apply to the VLAN subinterface.
The transmit connect speed calculated by QoS is 10 Mbps.
Based on these characteristics, Table 71 on page 397 lists the transmit connect speed
value reported in L2TP Transmit (TX) Speed AVP 24 for each calculation method,
and the reason why L2TP reports this value.
Table 71: Transmit Connect Speeds for L2TP over Ethernet Example
Transmit Connect
Calculation
Speed Reported in
Method
AVP 24
Static layer 2
100 Mbps
Configuring the Transmit Connect Speed Calculation Method
Chapter 13: Configuring an L2TP LNS
Reason
L2TP reports the speed of the underlying OC3
physical port because there is no explicit static
configuration for the layer 2 interface.
L2TP reports the transmit connect speed provided
by RADIUS.
L2TP reports the transmit connect speed calculated
by QoS.
L2TP reports the lesser of the dynamic layer 2
speed (10 Mbps) or the QoS speed (5 Mbps).
Reason
L2TP reports the advisory transmit speed
configured on the VLAN subinterface. If configured,
the advisory transmit speed takes precedence over
the physical port speed for a VLAN subinterface.
397
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