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Challenge 3: Influencing Routing

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Description

Make sure that VNG1 prefers CSR3 to send traffic to 10.3.0.0/16, and CSR4 for 10.4.0.0/24. You might use this configuration sample on your Cisco CSR appliances:

router bgp ?
  neighbor ?.?.?.? route-map tovngs out
route-map tovngs
  match ip address prefix-list branch4
  set as-path prepend ?
route-map tovngs permit 20
ip prefix-list branch4 permit ?.?.?.?/?

Would the solution have been different if CSR3 and CSR4 had different ASNs?

Success Criteria

  • VNG1/VNG2 prefer CSR3 to reach 10.3.0.0/16
  • VNG1/VNG2 prefer CSR4 to reach 10.4.0.0/16
  • Participants can relate the configuration in this challenge to the scenario with redundant ER connections in two Azure regions

Learning Resources