IP and Transport Networks Flashcards

Which technology does Ericsson use for network synchronization in transport networks to support LTE/5G timing requirements?

Answer: PTP (IEEE 1588)

PTP (Precision Time Protocol, IEEE 1588) provides the sub-microsecond synchronization accuracy required by LTE and 5G base stations.

What is the function of RSVP-TE in Ericsson MPLS networks?

Answer: Signals and reserves resources for traffic-engineered LSPs

RSVP-TE (Resource Reservation Protocol - Traffic Engineering) signals LSP setup and reserves bandwidth resources along the path.

In Ericsson IP transport, what is a VRF used for?

Answer: Creating separate virtual routing tables for different customers or services

A VRF (Virtual Routing and Forwarding) instance creates an isolated routing table, allowing multiple customers or services to share the same physical infrastructure.

Which Ericsson product line is used to provide microwave backhaul connectivity for mobile sites?

Answer: Ericsson MINI-LINK

Ericsson MINI-LINK is the portfolio of microwave backhaul solutions used to connect base stations to the core transport network.

What does the term 'Fast Reroute (FRR)' mean in Ericsson MPLS transport?

Answer: A method to quickly switch to a pre-computed backup path when a failure is detected

MPLS Fast Reroute provides sub-50ms failure recovery by switching to a pre-established backup LSP upon detecting a link or node failure.

Which encapsulation is used in Ericsson's Carrier Ethernet services to transport Layer 2 frames over an MPLS core?

Answer: Pseudowire (PWE3)

Pseudowire (PWE3) encapsulates Layer 2 frames inside MPLS labels to transport Ethernet, ATM, or TDM services over an IP/MPLS backbone.