Alcatel Lucent Virtual Private Routed Networks Set 1

Identify the egress PE in the MPLS domain ✘ Signal the egress VPRN ID ✘ Identify the ingress PE in the MPLS domain ✘ Transport route updates between PEs ✔

Identify the customer network on the egress PE ✘ Establish the LSPs between PE devices ✘ Identify the egress PE in the MPLS domain ✘ Identify the customer network on the ingress PE ✔

It will label switch the packet based on this label ✘ It will decrement the TTL and label switch the packet based on this label ✘ It will SWAP the label for a new label and then label switch the packet ✘ The P router does not perform any operation on this label ✔

A P router may forward customer packets to their destination without the presence of a route to that destination ✘ The ingress PE router may forward customer packets to their destination without the presence of a route to that destination ✘ The egress PE router may forward customer packets to their destination without the presence of a route to that destination ✘ Any provider core router (P or PE) may forward customer packets to their destination without the presence of a route to that destination ✔

It is the customer responsibility to ensure their address space is unique ✘ The Route Distinguisher ensures that addresses are unique between customers. ✘ The Route Target ensures that addresses are unique between customers ✘ The provider will advise the customers to change their addresses ✔ The provider will use NAT to ensure that addresses are unique between customers ✔

Static RIP OSPF BGP MP-BGP

One label per route ✘ One label per next-hop ✘ One label per VRF ✘ One label per prefix ✔ One label per tunnel ✔

A 32 bit IPv4 address followed by a 64 bit Route Target ✘ A 32 bit IPv4 address followed by a 64 bit Route Distinguisher ✘ A 64 bit Route Target followed by a 32 bit IPv4 address ✘ A 64 bit Route Distinguisher followed by a 32 bit IPv4 address ✔ A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32 bit IPv4 address ✔

It defines the VPN membership ✘ It defines which routes are imported into the vrf ✘ It defines which routes are exported from the vrf ✘ It is used to make IPv4 addresses unique ✔ It is used as the VPN label ✔

In the routing updates exchanged from CE to PE ✘ In the routing updates exchanged from PE to PE ✘ In the routing updates exchanged from P to PE ✘ In customer packets as they traverse the provider core ✔ In all route tables of the VPRN control plane ✔