By the end of this chapter, you should know and be able to explain the following:
What kind of switching method CEF is
Why CEF is needed for the forwarding of packets in MPLS networks
How CEF load balancing works
How to troubleshoot CEF problems
Being able to answer these basic questions on CEF helps you to understand how one of the building blocks of MPLS in Cisco IOS works. By the time you finish this chapter, you will have a solid understanding of CEF and why it is essential to the operation of MPLS networks.
Cisco Express Forwarding (CEF) is a packet forwarding or switching method that Cisco IOS uses. It is the latest IP switching method developed in Cisco IOS, and it is the default packet ...