Discover how the Cisco EIGRP performs load sharing, or load balancing, over equal cost paths. Explore methods to manipulate how many maximum paths are available to the router. Observe how the variance command can be utilized to include additional paths in the load sharing process.
- [Instructor] The EIGRP process on Cisco routers by default…will do load sharing on equal cost paths.…So if a router has multiple routes to the same destination…and they all share the same cost,…then the router will install up to four of these…into the route table.…Traffic can then be sent across all of these links.…The number of maximum paths varies…depending on router model and iOS version,…though it generally ranges from six to 16.…This is configurable…with the EIGRP sub command maximum-paths.…
A bonus of load sharing…beyond just gaining additional throughput…is faster route convergence.…If a router has multiple active paths for a prefix…and one fails, the others just continue on…assuming the load of the failed path.…A unique feature of EIGRP and load sharing…is the variance command.…EIGRP metrics seldom seem to be the exact same,…though they are often relatively close.…Variance allows prefixes with differing metrics…to be additionally added to the route table.…
The command is issued as an EIGRP router sub command.…
Author
Released
2/28/2018- Configuring a basic Enhanced Interior Gateway Routing Protocol (EIGRP) network
- Static neighbors or K-values
- Topology exchange
- Limiting query scope
- EIGRP default routing
- EIGRP for IPv6
- Open Shortest Path First (OSPF) fundamentals
Skill Level Advanced
Duration
Views
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Introduction
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Welcome1m 3s
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What you should know1m 4s
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1. RIP
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RIPng3m 35s
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2. EIGRP Fundamentals
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Fundamentals7m 6s
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Static neighbors or K-values4m 29s
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3. EIGRP Advanced
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Topology exchange5m 16s
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EIGRP load sharing2m 51s
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Convergence3m 37s
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Limit query scope3m 22s
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Route filtering prefix lists7m 25s
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Route filtering route maps4m 27s
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Route summarization3m 39s
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EIGRP default routing5m 2s
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4. EIGRP for IPv6
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Exploring EIGRP for IPv66m 28s
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5. OSPF Fundamentals
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Fundamentals3m 18s
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Basic configuration3m 56s
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Neighborships or timers5m 30s
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Network types5m 6s
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Virtual links4m 2s
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6. OSPF Internals
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Link-state database6m 20s
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Type 3 LSAs3m 32s
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Mixed area routes2m 11s
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Metric tuning3m 22s
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7. OSPF Advanced
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Filtering LSDB5m 25s
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Filtering RIB2m 48s
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Summarization5m 32s
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Stub networks5m 9s
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8. OSPFv3
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Exploring OSPFv35m 54s
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Conclusion
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Next steps40s
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Video: EIGRP load sharing