* 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 <policy-name> term <term-name> from protocol bgp-vpn set policy-options policy-statement <policy-name> term <term-name> then reject set protocols bgp group <group-name> export <policy-name> set protocols bgp apply-vpn-export