Chapter 3. CEF Enhanced Scalability
This chapter covers the following topics:
- Fundamental changes to CEF for CCSR
- Changes to show commands
- New show ip cef commands
- New show cef commands
- CEF event logger
- CEF consistency checker
- New CEF processes
Cisco Express Forwarding (CEF) is the most widely used forwarding mechanism on IP networks, so why change what works? There are several reasons:
- To improve CEF scaling and convergence times, with the end goal being the ability to handle up to 1 million prefixes in the forwarding table (so that you can sleep well if your network has reached the 900,000-route mark, and you were worried about the next phase of network growth)
- To make the interfaces between CEF, the routing table, access lists, Multiprotocol ...
Get Cisco Express Forwarding now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
