Chapter 5. Troubleshooting IGRP
This chapter covers the following key topics:
• Troubleshooting IGRP route installation
• Troubleshooting IGRP route advertisement
• Troubleshooting IGRP redistribution problems
• Troubleshooting dial-on-demand (DDR) routing issues in IGRP
• Troubleshooting route flapping in IGRP
• Troubleshooting variance problem
This chapter discusses common problems in IGRP networks and how to solve those problems. IGRP is a Cisco proprietary protocol. IGRP fixes some of the problems with RIP, but still it has similar characteristics as RIP. IGRP also does not support discontiguous networks or VLSM; however, it does have good features, such as variance, and its metric is based on bandwidth and delay instead of hop count.
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