Summary

This chapter explored PNNI configuration in multiservice switching networks. The specific configuration commands in three different POPs were covered, and a generic configuration model and a summary of configuration commands for all platforms were presented. Multiple PNNI verification commands aid in the operational aspects.

One important point to remember is that these configurations are orthogonal with the MPLS configurations covered in Chapters 6 and 7 in the sense that both MPLS and PNNI configurations can be present concurrently, not interfering with each other. This explicitly demonstrates ships in the night (SIN) mode. In the more general case, a multiservice switching network can run MPLS and PNNI as presented concurrently, along with other control planes such as NCDP, or even control planes not yet developed. This concept provides investment protection as well as incremental service provisioning.

The scalability of the multiservice switching network is multiplied by the use of feeder shelves.