Errata with the M120 Router Documentation

This section lists outstanding issues with the documentation.

• External clock synchronization on M120 routers is supported but not currently documented in the M120 Hardware Guide. External clock synchronization enables you to configure an interface that synchronizes the router’s internal Stratum 3 clock to an external source, and then synchronize the chassis interface clock to that source. You can configure the feature for external primary and secondary interfaces that use Building Integrated Timing System (BITS) or SDH Equipment Timing Source (SETS) timing sources, or an equivalent quality timing source. To configure, include the synchronization statement at the [edit chassis] hierarchy level. To view information about the external source used for chassis synchronization, issue the show chassis synchronization command. To change the external clock source, issue the request chassis synchronization switch command. To change the external clock source, issue the request chassis synchronization switch command. Refer to the System Basics, and System Basics Command Reference for configuration information.