Alcatel-Lucent 7750 Configuration Manual page 246

Interfaces
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The following example illustrates creation of an IMA bundle with 3 group members residing on a
channelized OC-3 ASAP MDA in slot 5/2/1:
A:ALA-A>config# port bundle-ima-5/2.1
A:ALA-A>config>port# multilink-bundle
A:ALA-A>config>port>ml-bundle# member 5/2/1.1.1.1
A:ALA-A>config>port>ml-bundle# member 5/2/1.1.2.1
A:ALA-A>config>port>ml-bundle# member 5/2/1.1.3.1
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The shutdown command for IMA groups sets the IMA group state to "Blocking". This
makes the group operationally down but will not bring down the individual IMA links.
Services configured on the IMA group will go operationally down as well.
The 7750 supports automatic IMA version changing when the far end IMA group version
matches the configured version. The group will remain operationally down until one of the
IMA groups changes version.
When adding member links to an IMA group, the clock-source of the e1 or ds1
link must be set to node-timed.
7750 SR Interface Configuration Guide