Physical Interface Preconfiguration Overview
Preconfiguration is the process of configuring interfaces before they are present in the system. Preconfigured interfaces are not verified or applied until the actual interface with the matching location (rack/slot/module) is inserted into the router. When the anticipated interface module is inserted and the interfaces are created, the precreated configuration information is verified and, if successful, immediately applied to the running configuration of the router.
Note |
When you plug the anticipated interface module in, make sure to verify any preconfiguration with the appropriate show commands. |
Use the show run command to see interfaces that are in the preconfigured state.
Note |
We recommend filling out preconfiguration information in your site planning guide, so that you can compare that anticipated configuration with the actual preconfigured interfaces when that interface module is installed and the interfaces are up. |
Tip |
Tip Use the commit best-effort command to save the preconfiguration to the running configuration file. The commit best-effort command merges the target configuration with the running configuration and commits only valid configuration (best effort). Some configuration might fail due to semantic errors, but the valid configuration still comes up. |