300-420 Designing Cisco Enterprise Networks (ENSLD)

An engineer is upgrading a company’s main site to include a connection to a second ISP. The company will receive full Internet routing tables from both ISPs via BGP. The engineer must ensure that the company does not become a transit autonomous system. Which solution should be included in this design?

  • A. Tag incoming routes from both ISPs with BGP community no-export.
  • B. Lower the MED for updates sent to the secondary ISP.
  • C. Use a route-map to prevent all prefixes from being advertised to either ISP.
  • D. Modify the local-preference for routes incoming from the primary ISP.
Answer: Option A.

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