Beta Draft Confidential
9-161/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Gateway Solution on CBX 3500
Configuring a Layer 2 Tunnel Over MPLS Core Network
Configuring a Layer 2 Tunnel Over MPLS Core Network
This release ensures ATM QoS through the IP/MPLS core. STM services and
QoS/SLA guarantees are delivered without sacrificing ATM network reliability. This
feature includes VNN support for CBX 500/GX 550 and VNN/PNNI for the
CBX 3500.
Follow these steps to set up a Layer 2 tunnel over MPLS core network using the 4-Port
OC-12c/STM-4 or 1-Port OC-48c/STM-16 POS ULC modules on a CBX 3500
switch:
For an ATM circuit, one endpoint must be a CBX 3500 and the other endpoint can be
any other switch or router that supports this. For a FR circuit, both endpoints must be
CBX 3500 switches.
Step 1. Configure node-based MPLS parameters, LSR ID and Valid MPLS Path Bits.
This configuration is done at the switch level to create the interfaces.
See “Configuring Node-based MPLS Parameters” on page 9-17.
Step 2. Configure PPP LPorts for each endpoint of the physical link of the PPP
configuration. See “Adding a PPP LPort” on page 9-19.
Step 3. Create an IP LPort under the PPP LPorts. See “Adding an IP LPort” on
page 9-32.
Step 4. Create an IP Interface under the IP LPort. See “Specifying the IP Interface
Address” on page 9-38.
Step 5. Create an OSPF interface under the IP Interface. See “Configuring OSPF IP
Parameters” on page 9-39.
Step 6. Configure the PSN (PE-PE) tunnel between the PPP LPorts set up in Step 1.
See “Configuring a PSN Tunnel” on page 9-43.
Step 7. Configure the Layer 2 tunnel on top of the MPLS tunnel. See “Configuring a
Layer 2 Tunnel” on page 9-51.
Step 8. Configure the ATM or FR circuit to transport data over the ATMoMPLS trunk.
See “Configuring an ATM or FR Circuit over a Layer 2 Tunnel” on page 9-60.
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