CCNP(R): Cisco Internetwork Troubleshooting Study Guide by Arthur Pfund

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By Arthur Pfund

As Cisco revises its middle aid examination (643-831) required for CCNP (Cisco qualified community expert) certification, Sybex has up-to-date its best-selling learn consultant. In its third variation, Sybex's CCNP: help examine consultant offers in-depth insurance of all examination ambitions and obviously addresses the hot applied sciences additional to the examination. prepared for optimum studying and retention, this entire consultant bargains sensible insights that take you past the fundamentals and strengthen key topic components. The better half CD comprises trying out engine with bonus pattern tests, digital flashcards for desktops and Palm handhelds, and the complete ebook in PDF.

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Extra resources for CCNP(R): Cisco Internetwork Troubleshooting Study Guide

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Each section in this chapter describes troubleshooting information for a specific media type. • • • Troubleshooting Ethernet Troubleshooting Token Ring Troubleshooting FDDI Troubleshooting LAN Media Problems 4-1 Troubleshooting Ethernet Troubleshooting Ethernet This section provides troubleshooting procedures for common Ethernet media problems. Table 4-1 outlines problems commonly encountered on Ethernet networks and offers general guidelines for solving those problems. Table 4-1 Media Problems: Ethernet Media Problem Suggested Actions Excessive noise Step 1 Use the show interfaces ethernet EXEC command to determine the status of the router’s Ethernet interfaces.

Step 1 Insert the router during an off-peak period. Step 2 If insertion is successful during off-peak periods, but unsuccessful during peak load, segment your internetwork to distribute traffic. Step 1 Use the no lnm rps interface configuration command to disable the RPS function on the router that you are trying to insert into the ring. Step 2 Try to insert the router into the ring. Step 3 If you can insert the router with RPS disabled, there is a conflict between RPS implementations. Contact your technical support representative for more information.

This display might show that the image is deleted and indicate the reason. Following is an example of show flash output indicating that the image is deleted: babar# show flash 2048K bytes of flash memory sized on embedded flash. 2 [deleted] [invalid cksum] [0/2097152 bytes free/total] Incorrect image in Flash memory Step 1 A “wrong system software” message is displayed when a router attempts to boot an incorrect image. In this case, the router is being booted from the ROM monitor. 40:!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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