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    Default Import and Export Policies for Protocols

    Table 1: Default Import and Export Policies for Protocols

    Importing or Exporting Protocol

    Default Import Policy

    Default Export Policy

    BGP

    Accept all received BGP IPv4 routes learned from configured neighbors and import into the inet.0 routing table. Accept all received BGP IPv6 routes learned from configured neighbors and import into the inet6.0 routing table.

    Readvertise all learned BGP routes to all BGP speakers, while following protocol-specific rules that prohibit one IBGP speaker from readvertising routes learned from another IBGP speaker, unless it is functioning as a route reflector.

    DVMRP

    Accept all DVMRP routes and import into the inet.1 routing table.

    Accept and export active DVMRP routes.

    IS-IS

    Accept all IS-IS routes and import into the inet.0 and inet6.0 routing tables. (You cannot override or change this default policy.)

    Reject everything. (The protocol uses flooding to announce local routes and any learned routes.)

    LDP

    Accept all LDP routes and import into the inet.3 routing table.

    Reject everything.

    MPLS

    Accept all MPLS routes and import into the inet.3 routing table.

    Accept and export active MPLS routes.

    OSPF

    Accept all OSPF routes and import into the inet.0 routing table. (You cannot override or change this default policy.)

    Reject everything. (The protocol uses flooding to announce local routes and any learned routes.)

    PIM dense mode

    Accept all PIM dense mode routes and import into the inet.1 routing table.

    Accept active PIM dense mode routes.

    PIM sparse mode

    Accept all PIM sparse mode routes and import into the inet.1 routing table.

    Accept and export active PIM sparse mode routes.

    Pseudoprotocol:

    • Direct routes
    • Explicitly configured routes:
      • Aggregate routes
      • Generated routes
      • Static routes

    Accept all direct and explicitly configured routes and import into the inet.0 routing table.

    The pseudoprotocol cannot export any routes from the routing table because it is not a routing protocol.

    Routing protocols can export these or any routes from the routing table.

    RIP

    Accept all RIP routes learned from configured neighbors and import into the inet.0 routing table.

    Reject everything. To export RIP routes, you must configure an export policy for RIP.

    RIPng

    Accept all RIPng routes learned from configured neighbors and import into the inet6.0 routing table.

    Reject everything. To export RIPng routes, you must configure an export policy for RIPng.

    Test policy

    Accept all routes. For additional information about test policy, see Routing Policy Tests.

    Published: 2012-12-04