CCNP TSHOOT 642 832 Quick Reference by Brent Stewart

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Please see page 69 for more details. [ 52 ] CCNP TSHOOT 642-832 Quick Reference CHAPTER 4 by Brent Stewart Troubleshooting Switches There are three first-hop redundancy protocols: n HSRP is an older Cisco proprietary protocol. One router is the active and one is the standby. The routers pass keepalives that enable the standby to recognize failure of the primary router. n VRRP is an open standard but is otherwise similar to HSRP. Because HSRP works, many organizations have continued to use HSRP.

If the organization has a Cisco SmartNet maintenance contract, the serial number and part-number information is necessary to obtain spares: Foard-rtr01#show inventory NAME: “Chassis”, DESCR: “Cisco 7206VXR, 6-slot chassis” PID: CISCO7206VXR , VID: , SN: 24323096 NAME: “NPE-G2 0”, DESCR: “Cisco 7200 Series Network Processing Engine NPE-G2” PID: NPE-G2 , VID: V03 , SN: JAS1456B4EC NAME: “disk2”, DESCR: “256MB Compact Flash Disk for NPE-G2” PID: MEM-NPE-G2-FLD256 , VID: , SN: NAME: “module 0”, DESCR: “I/O Dual FastEthernet Controller” PID: C7200-I/O-2FE/E , VID: , SN: 21753008 NAME: “disk0”, DESCR: “Cisco 7200 I/O PCMCIA Flash Disk, 48M” PID: MEM-I/O-FLD48M , VID: , SN: NAME: “disk1”, DESCR: “Cisco 7200 I/O PCMCIA Flash Disk, 48M” PID: MEM-I/O-FLD48M , VID: , SN: NAME: “module 1”, DESCR: “Serial” PID: PA-8T-V35= , VID: , SN: 49010448 NAME: “module 2”, DESCR: “4 port, software configurable Multichannel T1/E1 with TDM Port Adapter” PID: PA-MCX-4TE1 , VID: , SN: JAS1680Y0EM © 2010 Pearson Education, Inc.

All rights reserved. This publication is protected by copyright. Please see page 69 for more details. [ 37 ] CCNP TSHOOT 642-832 Quick Reference CHAPTER 3 by Brent Stewart Troubleshooting Tools A complete and accurate inventory is another part of troubleshooting. Of course, this information is much more useful if obtained before a problem occurs and connectivity drops! By comparing the inventory to previous inventories, it is possible to recognize differences (caused, presumably, by hardware failure).

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