Beta Draft Confidential
Configuring ATM Over MPLS Trunks
About ATMoMPLS Trunks
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/058-9
Figure 8-4. ATMoMPLS Trunk Between ATM Switches Over
IP/MPLS Core
ATMoMPLS Trunk Features
ATMoMPLS trunks support many of the same features as other trunks that can be
configured on Lucent CBX 500 and GX 550 ATM switches, such as:
• Transparent provisioning of PVCs and SVCs across ATM islands connected via
an ATMoMPLS trunk
• QoS support for CBR, VBR-rt, VBR-nrt, and UBR VCCs and VPCs traversing
the ATMoMPLS trunk
• Support for point-to-multipoint PVCs, SVCs, and SPVCs
• Ability to define management-only trunks
• VNN single- and multi-area support
• Support for Layer 2 VNN VPNs
• Support for 1+1 bi-directional fast Automatic Protection Switching (APS)
• Support for administrative and path control
• Load balancing and least-cost routing features
• OAM F5 end-to-end support for VCCs and OAM F4 end-to-end support for VPCs
IP/MPLS Core
ATM Network
ATMoMPLS Trunk
GX 550
Juniper T-Series Juniper T-Series
ATM Network
GX 550
PE to PE E-LSP (PSN Tunnel)
Trunk VPN Label (Lucent Trunk VPN)
Up to 31 QoS-specific data VPs
1 VP reserved for control traffic
CBX 500 CBX 500
OC-12c ATM
OC-48c/OC-192 POS
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