CCNP TSHOOT 6.0 - The Cisco Learning Network

CCNPv6 TSHOOT
Section 2—Troubleshooting Reference Information
General Troubleshooting Process
As a general guideline, you can use the following general troubleshooting process described in the course.
1. Define the problem (symptoms).
2. Gather information.
3. Analyze the information.
4. Propose a hypothesis (possible cause).
5. Test the hypothesis.
6. Eliminate or accept the hypothesis.
7. Solve the problem.
8. Document the problem.
Command Summary
The table lists useful commands for this lab. The sample output is shown on following pages.
Command Key Information Displayed
show interfaces type/#
show interfaces type/# summary
show interfaces type/# stats
show ip interface type/#
clear counters type/#
show processes cpu sorted
show processes cpu history
show processes memory sorted
show memory statistics
show ip cef
Displays the interface IP address, subnet mask, MAC
address, and load statistics.
Displays a summary of input and output queues and packet
transmit and receive rates.
Displays the switching path and the number of characters or
packets in and out for the processor and route cache (Cisco
Express Forwarding).
Displays primarily IP-related information for the interface,
such as the helper address, multicast groups, and route
cache processing status.
Clears the interface counters on an interface.
Displays short-term CPU utilization (five seconds, one
minute, and five minutes). It also lists the currently running
processes, sorted by the most CPU utilization to the least.
Displays long-term CPU utilization in a graph format for the
last 60 seconds, 60 minutes, and 72 hours. Useful for
analyzing CPU load over time.
Displays memory CPU utilization (used and free) for the
processor and I/O memory pools. The entries are sorted by
the highest amount of holding memory used.
Displays a summary of memory utilization (total, used, and
free) for the processor and I/O memory pools. The lowest is
the smallest amount of free memory since the last boot. The
largest is the size of the largest available free block.
Displays all known prefix entries in the Cisco Express
Forwarding Forwarding Information Base (FIB). The prefix,
next-hop IP address, and the exit interface are shown. If
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