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Place the BGP attributes in the correct order used for determining a route.

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Place the BGP attributes in the correct order used for determining a route.

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Answer:

4 Comments on “Place the BGP attributes in the correct order used for determining a route.

  1. me says:

    WRONG :

    AS_PATH before ORIGIN

    http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13753-25.html

    1.Prefer the path with the highest WEIGHT.

    Note: WEIGHT is a Cisco-specific parameter. It is local to the router on which it is configured.

    2.Prefer the path with the highest LOCAL_PREF.

    Note: A path without LOCAL_PREF is considered to have had the value set with the bgp default local-preference command, or to have a value of 100 by default.

    3.Prefer the path that was locally originated via a network or aggregate BGP subcommand or through redistribution from an IGP.

    Local paths that are sourced by the network or redistribute commands are preferred over local aggregates that are sourced by the aggregate-address command.

    4.Prefer the path with the shortest AS_PATH.

    Note: Be aware of these items:

    ◦This step is skipped if you have configured the bgp bestpath as-path ignore command.

    ◦An AS_SET counts as 1, no matter how many ASs are in the set.

    ◦The AS_CONFED_SEQUENCE and AS_CONFED_SET are not included in the AS_PATH length.

    5.Prefer the path with the lowest origin type.

    Note: IGP is lower than Exterior Gateway Protocol (EGP), and EGP is lower than INCOMPLETE.

    6.Prefer the path with the lowest multi-exit discriminator (MED).




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