At the command prompt on the SUSE Manager Server, as root, use the spacewalk-common-channels command to add the appropriate channels. Ensure you specify the correct architecture:

spacewalk-common-channels \
-a <architecture> \
<base_channel_name> \
<child_channel_name_1> \
<child_channel_name_2> \
... <child_channel_name_n>

If automatic synchronization is turned off, synchronize the channels:

spacewalk-repo-sync -p <base_channel_label>

Ensure the synchronization is complete before continuing.