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CHAPTER
36-1
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
36
Configuring Inverse Muliplexing over ATM
This feature module describes how to configure Inverse Multiplexing over ATM (IMA) to transport ATM
traffic over a bundle of T1 or E1 cables. This feature enables the expansion of WAN bandwidth from T1
speeds, without DS3 or OC3 circuits.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release. To find information
about the features documented in this module, and to see a list of the releases in which each feature is
supported, see the “Feature Information for Inverse Multiplexing over ATM” section on page 36-26.
Use Cisco Feature Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on
Cisco.com is not required.
Contents
• Prerequisites, page 36-1
• Restrictions, page 36-2
• Feature Overview, page 36-2
• How to Configure IMA, page 36-2
• Configuring ATM IMA on T1/E1 Interface, page 36-3
• Configuring ATM IMA over MPLS, page 36-4
• How to Configure ATM Class of Service, page 36-11
• Configuring Marking MPLS Experimental Bits, page 36-17
• Additional References, page 36-25
• Feature Information for Inverse Multiplexing over ATM, page 36-26
Prerequisites
Before testing any IMA implementation, you should terminate the T1 circuits end-to-end.