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Introduction 84
Model 3086FR ATM IAD User Guide 8 • 3086FR routed and bridged ATM connections
Introduction
In addition to FR to ATM conversion and transport over DSL, the 3086FR is a full feature ATM router,
allowing routed or bridged services between the DSL interface and the 10/100Base-T. The Model 3086FR can
simultaneously transport traffic from the serial port and the 10/100Base-T Ethernet port over a single-pair
DSL link. In this case, the 3086FR operates in split-mode DSL bandwidth allocating dedicated timeslots in
the DSL frame for the serial port, and for the Ethernet traffic.
When routing or bridging data from the 10/100Base-T port, keep in mind that data from the 3086FR serial
port is converted from Frame Relay to ATM encapsulation only, this traffic does not go thru the router or
bridge core in the 3086FR. When enabling the router or bridge for traffic from the 10/100Base-T, a separate
PVC and dedicated DSL timeslots have to be configured for this traffic.
The main configuration steps for this scenario are as follows:
1. Configure the DSL interface. Assign DSL bandwidth to the serial port, and the remaining DSL bandwidth
will be assigned to 10/100Base-T port. For instance, if you select a DSL rate of 512 kbps and 256
kbps are
assigned to the serial port, the remaining 256 kbps of DSL bandwidth will be automatically assigned to
10/100Base-T traffic.
2. Configure the serial port. Assign the DSL bandwidth required for the traffic on this port.
3. Configure the FR to ATM features for the serial port.
4. Configure the LMI
If you are using the 10/100Base-T port to route or bridge data:
1. Create a bridged or routed ATM connection.
2. Configure the bridge or router, and ATM parameters (including a PVC)
3. Configure DHCP, NAT, Authentication, Security features, etc, if needed, for this routed or bridged con-
nection.
The following ATM routed and bridged connections are available with the 3086FR:
• RFC 1483 bridged
• PPPoA (PPP over ATM) bridged
• RFC 1483 routed
• IPoA (IP over ATM) routed
• PPPoA (PPP over ATM) routed
DSLAM Connections with remote CPE units
Bridged application configurations to a DSLAM
Two bridged services are offered, RFC 1483 Bridged and PPPoA Bridged.
The configurations show a desktop on one end and a laptop on the other. The laptop and its Model 3086FR
would be replaced with a DSLAM.