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BGP starts advertising all the routes with "as_prepend", even to AS where prepend is not configured
Symptoms
  • After some uptime, BGP on Check Point Security Gateway starts advertising all the routes with "as_prepend", even to AS where prepend is not configured.

    Example:

    • Topology consists of 3 major AS:
      [Internal AS "X"] --- [Check Point AS "Y"] --- [External AS "Z"]
    • The desire is that only specific routes learned from AS "X" will be prepended by AS "Y" (using "routemap") towards AS "Z".
    • Traffic capture and BGP Traces show that AS "Y" sends a BGP update towards AS "Z" with AS prepend set, which affects all routes inside the BGP update.
  • Manual restart of RouteD daemon (using the tellpm command) resolves the issue only for some time.

Solution
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