The exhibit shows the configuration of a VRF (Virtual Routing and Forwarding) instance on a Juniper PE router. Let's break down the key components:
VRF Configuration (VPN-A)
The instance type is VRF, meaning this is an L3VPN (Layer 3 VPN).
The routing instance contains a static route (10.1.0.0/16 next-hop 10.1.0.1).
The interface ge-0/0/2.0 is assigned to the VRF.
Route Distinguisher (RD): 172.17.20.1:1
VRF-Export Policy: vpn-a-export
VRF-Target: target:65512:1 (This defines which routes will be imported into the VRF).
VRF Export Policy (vpn-a-export)
community add vpn-a-target;
community add vpn-m-target;
accept;
The vpn-a-target community corresponds to target:65512:1.
The vpn-m-target community corresponds to target:65512:2.
Policy-Options (Community Definitions)
community vpn-a-target members target:65512:1;
community vpn-m-target members target:65512:2;
Evaluating the Answer Choices
✅ Option A: "VPN routes are exported with the target:65512:1 and target:65512:2 route targets."
The vpn-a-export policy explicitly adds both vpn-a-target (65512:1) and vpn-m-target (65512:2) to exported routes.
This is correct. ✅
❌ Option B: "You cannot use the vrf-target and vrf-export statements in the same VRF."
This is incorrect.
Juniper allows the use of both vrf-target and vrf-export in the same VRF:
vrf-target is used for importing routes.
vrf-export defines export policies (which can add additional route targets).
This is incorrect. ❌
❌ Option C: "VPN routes with the target:65512:1 and target:65512:2 route targets are imported."
The vrf-target target:65512:1; statement only controls importing routes.
The import policy does not include target:65512:2, so routes tagged with target:65512:2 alone would not be imported into this VRF.
This is incorrect. ❌
❌ Option D: "VPN routes are exported with only the target:65512:1 route target."
Final Answer:
✅ A. VPN routes are exported with the target:65512:1 and target:65512:2 route targets.
Verification from Juniper Documentation
Juniper MPLS L3VPN Configuration Guide confirms that vrf-target is used for importing, while vrf-export can be used for exporting multiple route targets.
Juniper Routing Policy Documentation states that export policies can add multiple BGP communities (route targets).
RFC 4364 (BGP/MPLS IP VPNs) defines the use of route targets for VPN route control.
