Nokia 4A0-104 - Alcatel-Lucent Services Architecture

When a PE router receives an IPv4 prefix from its local CE, it creates a VPN-IFV4 prefix.

VPN-IPv4 allows BGP to distinguish between duplicate prefixes originating from different customers.

In a VPRN, data traffic is carried in packets that have VPN-IPv4 addresses.

VPN-IFV4 addresses are only present within the service provider network.

sap 1/1/1

sap 1/1/1:*.0

sap 1/1/1:0.*

1/1/1:0

The matching outer tag is removed, and the frame is forwarded.

The inner tag is removed, and the frame is forwarded.

The inner tag is changed to match the SAP, and the frame is forwarded.

The frame is dropped.

By default, the VC ID on the mesh SDPs of a VPLS are set to the service ID.

A VPLS appears to the customer as a direct Ethernet connection.

Mesh SDPs are used for VPLSes to avoid loops.

By default, T-LDP is used for signaling service labels.

Each VRF table contains routes for a single VPRN.

Route targets are used to determine if a prefix belongs to a VRF.

Routes in the VRF table are advertised to the core routers.

VPN labels identify which VRF table should be used for a packet.

Option A

Option B

Option C

Option D

The service takes a route determined by the IGP.

The tunnel does not use a service label.

The service label is swapped at each hop in the transport network.

The tunnel is bidirectional and only requires configuration at one end of the service.

They allow a VPLS to scale more easily.

They use mesh SDPs to connect smaller VPLSes together.

They allow a service to span multiple metro networks.

They simplify the configuration required when adding new PEs.

Route targets are carried in MP-BGP updates.

Route targets identify the VRF that a VPN-IFV4 prefix is associated with.

Route targets are communicated between PEs that are part of a specific VPRN.

Route targets identify the egress SAP of a service towards a CE.

vc-type ether

vc-type vlan

vc-type dot1q

vc-type null