ETCP IP and Transport Networks 3

Question 1

In Ericsson transport networks, what does OAM stand for?

Accepted Answer

Operations, Administration, and Maintenance

Answer

OAM (Operations, Administration, and Maintenance) encompasses tools and protocols for monitoring, fault detection, and management of network services.

Question 2

What is the purpose of Ethernet OAM (802.3ah/802.1ag) in Ericsson Carrier Ethernet deployments?

Accepted Answer

To detect and locate faults in Ethernet links and services

Answer

Ethernet OAM protocols (802.3ah for link-level and 802.1ag for end-to-end service) enable fault detection, path discovery, and performance monitoring.

Question 3

Which protocol provides link-level failure detection in milliseconds in Ericsson IP transport, often used alongside OSPF or BGP?

Accepted Answer

BFD (Bidirectional Forwarding Detection)

Answer

BFD provides rapid sub-second failure detection between directly connected or remote routing peers, enabling faster protocol convergence.

Question 4

In Ericsson's Segment Routing (SR) deployment, what replaces traditional RSVP-TE signaling?

Accepted Answer

Source-based path encoding using segments

Answer

Segment Routing encodes the forwarding path directly in the packet header using ordered segments, eliminating the need for per-flow RSVP-TE state in the network.

Question 5

What is the primary advantage of using SR-MPLS over traditional LDP in Ericsson transport networks?

Accepted Answer

Simplified control plane with source-based routing and no per-path state in transit nodes

Answer

SR-MPLS eliminates the need for LDP or RSVP-TE signaling state in transit nodes, reducing control plane complexity while enabling traffic engineering.

ETCP - Ericsson Technical Certification Program Practice Test

ETCP - Ericsson Technical Certification Program Practice Test

ETCP IP and Transport Networks 3