© 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.21-1 Module Summary MPLS is a forwarding mechanism in which packets are forwarded based on labels.

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© 2006 Cisco Systems, Inc. All rights reserved. MPLS v Module Summary MPLS is a forwarding mechanism in which packets are forwarded based on labels. MPLS uses a 32-bit label format, which is inserted between Layer 2 and Layer 3. Labels can be inserted, swapped, or removed. MPLS applications can use different routing and label exchange protocols while still using the same label-forwarding engine.

© 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.21-1