Free Juniper JN0-281 Exam Dumps

When advertising OSPF routes into BGP, the appropriate routing policy should be applied as an export policy in BGP.

Step-by-Step Breakdown:

OSPF to BGP Route Advertisement:

Routes learned via OSPF (a dynamic IGP) need to be exported into BGP to be advertised to external BGP peers. In Junos OS, this is done using export policies.

Export Policies in BGP:

An export policy controls which routes are advertised out of a BGP session. In this scenario, the routing policy must be applied to BGP as an export policy to export the OSPF-learned routes to external BGP peers.

Policy Configuration:

Example configuration:

set policy-options policy-statement EXPORT_OSPF term 1 from protocol ospf

set policy-options policy-statement EXPORT_OSPF term 1 then accept

set protocols bgp group <group-name> export EXPORT_OSPF

This policy ensures that only OSPF routes are exported into BGP.

Juniper Reference:

Routing Policy: Export policies are used in BGP to control route advertisements to peers, including those learned via OSPF.