6/26/2018

Arista J/J+ FlexRoute with Internet Routing Table

https://www.arista.com/assets/data/pdf/Whitepapers/FlexRoute-WP.pdf
  • CLI: 
    • ip hardware fib optimize prefix-length internet
    • show ip bgp summary
    • show ip route summary
    • show hardware capacity | grep Routing
  • Routing HW resources are sliced to fit the route distribution of REAL internet routing table
  • If loading a lab configuration like Ixia, you mean see the error message like - "%CAPACITY-1-UTILIZATION_HIGH. LEM table utilization is currently at 91%, crossed threshold 90%"
  • For example, if too many /24, it will be moved to LEM
  • And another important concept of prefix, route and FIB:
    • 3 x internet feeds = 3 x 600K prefixes
    • 3 prefixes of same dest = 1 route with 3 NH if ECMP
    • 1 route = 1 FIB entry

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