642-812 Building Converged Cisco Multilayer Switched Networks
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Demo Question 6.
The following output was seen on a EliteCertify device as shown below: Study the exhibit carefully. For what purpose is the command "show ip cef" used?
A. To display CEF. based MLS lookups
B. To display ARP throttling
C. To display TCAM matches
D. To display rewritten IP unicast packets
E. To display entries in the Forwarding Information Base (FI
F. To display ARP resolution packets
G. None of the above
Display Answer
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Answer: E
Explanation: Cisco Express Forwarding (CEF. is a multilayer-switching technology that allows for
increased scalability and performance to meet the requirements of large enterprise
networks. CEF has evolved to accommodate the traffic patterns realized by modern
networks. These networks are characterized by an increasing number of short-duration
flows. Shorter flows are common in environments with a high degree of web-based
activity, or other highly interactive types of traffic.
The contents of the FIB table can be viewed by issuing the command show ip cef detail
from the MSFC2. The command show ip cef can be used to view the contents of the CEF
adjacency table from the MSFC2. The command show ip cef summary provides a brief
overview of the CEF process. It shows information such as the total number of
adjacencies and routes.
Example of show ip cef detail
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