4A0-115 Nokia Ethernet Virtual Private Network Services Questions and Answers

PEI

PE2

PE3

PE4

Configure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.

Configure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.

Configure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.

Configure a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.

The updates include an Ethernet segment identifier label that is used in loop prevention.

The updates advertise the Ethernet segment availability in a given EVPN service.

The updates include an MPLS label that is set to a non-zero value.

The updates include an Ethernet tag ID that is set to zero.

PEI advertises an auto-discovery per EVPN instance (A-D per EVI) route to PE3 as soon as the SAP becomes operationally

PE3 advertises an IMET route to PEI as soon as VPWS 4 is administratively enabled.

PEI and PE3 exchange their service labels using A-D per EVI routes.

PE3 and PE4 exchange their service labels over an established targeted LDP session.

An MP-BGP session that supports the advertisement of VPN-IPv4 routes is established between PE3 and PE4.

An MP-BGP session that supports the advertisement of EVPN routes is established between PEI and PE2.

On PE3, the routing table for VPRN 15 contains an entry for 10.10.1.0/24. This entry is resolved to MAC-OI as an overlay index.

On PE3, the routing table for VPRN 15 contains an entry for 10.10.4.0/24. This entry is resolved using a transport tunnel towards PEA.

EVPN MAC/IP routes are used to advertise the IP prefixes of subnets attached to a VPRN.

VPRN instances are interconnected using a supplementary broadcast domain (SBD) VPLS.

Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS.

The MAC/IP routing information is used to populate the VPRN routing table at the remote PEs.

This service requires the use of EVPN-MPLS for data plane.

In this service, the IRB interface acts as a default gateway for hosts in the corresponding subnet.

This service consists of a VPRN and multiple VPLSs.

This service enables the use of EVPN to provide connectivity between hosts in different subnets.

The flooding list maintained by PEI for VPLS 20 contains three entries: PE2, PE3, and PE4.

PE3 advertises an IMET route to PEI when its VPLS 20's mesh-SDP becomes operationally UP.

PE3 signals a service label to PE4 when its VPLS 20 is enabled and is bound to an operational SDP.

PEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.

The same tag ID must be configured for the local attachment circuit (AC) at each PE.

Each PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.

The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.

Each PE verifies that the received tag ID matches its configured local AC tag ID.