Backward Compatibility for Multiple TDM Profiles
Suppose you configured the Primary Rate Interface (PRI) in a previous release that did not support multiple Time Division Multiplexing (TDM) profiles. Later, you upgraded to a release that supports multiple TDM profiles, and rebooted. The system sets route-group to 0 and span-number to 1,2,3,4 (on a 4 span card). The result is that all spans remain configured as before, when a single tdm-profile was the only possible configuration. The system routes through the same TDM profile as before the upgrade. If you want to route to specific spans after the upgrade, you can create TDM profiles for specific spans or refer to the exact span number in the next-hop (tdm:span:<number>) parameter under local-policy.