Restrictions with Stub Areas

• Stubby

  • Cannot have ASBR outside Area 0
  • Potential problem during migration
  • Potential problem for multiple Internet attachment points

• Totally stubbly

  • Single ABR; single point of failure
  • Cisco proprietary
  • Maximum traffic reduction

• Not So Stubby

  • Can only know externals injected into it by local ASBR

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