JN0-649 Exam Dumps : Enterprise Routing and Switching Professional (JNCIP-ENT)

Step 1: Identify the problem.

Devices do not support VPN NLRI, and you must prevent these devices from receiving BGP VPN routes.

Step 2: Analyze the possible solutions.

Option A: Configure an import policy on the remote peer to reject the routes when they are received.

This approach would require configuration on the remote peer, which might not always be practical or possible.

Option B: Configure an export policy on the local BGP peer to reject the VPN routes being sent to the remote peer.

This ensures the local BGP peer does not send the VPN routes to the remote peer, directly addressing the problem.

Option C: Configure a route reflector for the VPN NLRI.

This does not solve the issue of preventing the advertisement of VPN routes to non-supporting peers.

Option D: Configure the apply-vpn-export feature on the local BGP peer.

This feature ensures that the VPN export policies are applied, preventing the advertisement of VPN routes to peers that do not support VPN NLRI.

Step 3: Verify the configurations.

Option B and Option D directly address the requirement without needing configurations on the remote peer.

References:

Juniper BGP configuration guide on export policies​​​​​​.

Commands for applying export policies:

shell

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set policy-options policy-statement term from protocol bgp-vpn

set policy-options policy-statement term then reject

set protocols bgp group export

set protocols bgp apply-vpn-export

Step 1: Identify the requirement.

You need an OSPF area that only contains intra-area route information in the form of Type 1 and Type 2 LSAs.

Step 2: Analyze the possible OSPF area types.

Option A: Totally non-to-stubby area.

Option B: Totally stubby area.

Option C: Stub area.

Option D: Non-to-stubby area.

Step 3: Understand OSPF area types.

Totally Stubby Area (Option B): Only allows Type 1 and Type 2 LSAs and blocks Type 3, 4, and 5 LSAs. It uses a default route to represent external routes.

This fits the requirement of containing only intra-area routes.

References:

Juniper OSPF configuration guide on area types​​​​.

Commands for configuring a totally stubby area:

shell

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set protocols ospf area stub no-summaries