A. The source DR sends PIM register messages from the source network to the RP.
C. The receiver DR sends PIM join and PIM prune messages from the receiver network toward the RP.

D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration.

C. All areas are required to connect to area 0.
D. The SPF algorithm prunes looped paths within an area.

B. You expect a silent discard.

B. This value is used to identify BGP routes learned from the remote PE device.

D. This value is used to add a target community to BGP routes advertised to the remote PE device.

Answer DescriptionExplanation:

The `vrf-target` statement in a Layer 3 VPN configuration is used to control the import and export of VPN routes by attaching a target community to the routes. This helps in defining which VPN routes should be imported into or exported from a particular VRF (Virtual Routing and Forwarding) instance.

1. Understanding VRF Target

• The `vrf-target` statement specifies the extended community attributes (route targets) that are used to control the import and export of routes in a VRF.
• These attributes help in identifying which routes should be shared between different VRFs, particularly across different PE (Provider Edge) devices.

2. Statements Analysis

• This value is used to identify BGP routes learned from the local CE device incorrect. The `vrf-target` attribute is not used to identify routes learned from the local CE device. It is used to manage routes between PE devices and within the provider's MPLS network.
• This value is used to identify BGP routes learned from the remote PE device.
• Correct. The `vrf-target` value helps in identifying which routes from remote PE devices should be imported into the local VRF. It essentially acts as a filter for importing BGP routes with matching target communities.
• This value is used to add a target community to BGP routes advertised to the local CE device.
• Incorrect. Routes advertised to the local CE device do not use the `vrf-target` attribute. Instead, these routes are typically managed within the local VRF routing table.
• This value is used to add a target community to BGP routes advertised to the remote PE device.
• Correct. When advertising routes from the local PE to remote PE devices, the `vrf-target` value is added to these routes. This target community ensures that the correct routes are shared across the VPN.

Conclusion:

The correct statements about the `vrf-target` configuration in a Layer 3 VPN scenario are:

This value is used to identify BGP routes learned from the remote PE device.

This value is used to add a target community to BGP routes advertised to the remote PE device.

C. When the encapsulation is vLan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement

D. When the encapsulation is ethemet-ccc, tagged and untagged frames are both accepted in the data plane.

Answer DescriptionExplanation:

The customer interface in an LDP-signaled pseudowire is the interface on the PE router that connects to the CE device. An LDP-signaled pseudowire is a type of Layer 2 circuit that uses LDP to establish a point-to-point connection between two PE routers over an MPLS network. The customer interface can have different encapsulation types depending on the type of traffic that is carried over the pseudowire. The encapsulation types are ethernet-ccc, vlan-ccc, extended-vlan-ccc, atm-ccc, frame-relay-ccc, ppp-ccc, cisco-hdlc-ccc, and tcc-ccc. Depending on the encapsulation type, the customer interface can accept or reject tagged or untagged frames in the data plane, and include or exclude VLAN tags in the control plane LDP advertisement. The following table summarizes the behavior of different encapsulation types:

C. The packet will be forwarded with no classification changes.

C. destination-based Remote Triggered Black Hole