Configuring timing references

Use commands in the following context to configure timing reference settings:

• MD-CLI

  configure system central-frequency-clock

• classic CLI

  configure system sync-if-timing

The source port specified for ref1 and ref2 is dependent on the router model type and chassis slot. See the details in the specific command descriptions in the 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide.