Redistribution

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Injecting

• EIGRP

  • injects as external (EX)
  • Administrative Distance 170
  • no auto-summary

• OSPF

  • injects as external type 2 (E2)
  • Cost 20
  • requires "subnets" param

• RIP

  • injects as rip (R)
  • no auto-summary

Logic

• all routes in routing table under this protocol
• all connected subnets matched by this protocol's "network" command

Preventing Suboptimal Routes

• setting administrative distance - might mess up real external routes
• route tags

Order of Precedence

• RIP - none
• EIGRP - internal, then external
• OSPF -intra-area, inter-area, E1 then E2 (if tie, cost to advertising ASBR)
• IS-IS - L1, L2, then external