Ethernet OAM

Question 1

O Ethernet OAM suporta dois sets de função:

____
____

Answer 1

Connectivity fault Management - CFM

Performance Monitor - PM

Question 2

The portion of a network typically owned and operated by a single entity

Answer 2

Maintenance domain (MD)

MDs are configured with names and eight levels, ranging from 0 to 7. A hierarchical relationship based on these levels exists between domains.

Question 3

The boundary points of a maintenance domain. They can initiate and terminate OAM frames. End-to-end tests are initiated and terminated by then.

Answer 3

Maintenance entity group end point (MEP)

Question 4

They do not initiate OAM frames, but can respond to some OAM frames (loopback and link trace) to isolate faults.

Answer 4

Maintenance entity group intermediate point (MIP)

Question 5

A set of MEPs established to verify the integrity of a single service instance.

Answer 5

Maintenance association (MA)

Question 6

OAM Standards

____ focuses on the end-to-end connectivity and continuity of nodes in an Ethernet network. This is why it is referred to as connectivity fault management, or CFM

Answer 6

IEEE 802.1ag

Question 7

Quais as 3 principais funções do CFM - 802.1ag

Answer 7

Continuity check messages (CCM)
Loopback messages and responses (LBM and LBR)
Link trace messages and Responses (LTM and LTR).

Question 8

A ________ is an OAM Protocol Data Unit (OAMPDU) that provides service monitoring from one end point to another (MEP to MEP).

Answer 8

Mensagens CCM continuity check message

tipo ping entre os CE

can be configured to be sent at one of seven standard intervals: 3.3ms, 10ms, 100ms, 1s, 10s, 1 min, and 10min.

When the reception of CCM messages at a node is lost, this represents the loss of connectivity to that node

Question 9

CCMs can be either multicast or unicast

Answer 9

true

Question 10

As mensagens LBMs and LBRs são usadas para determinar integridade do caminho

Answer 10

Loopback messages e loopback responses

A loopback is similar to a layer 3 ping request/reply. In a loopback test, a MEP sends messages to another MEP or MIP to verify connectivity across a given MA

Question 11

LTMs and LTRs são similares a traceroute, um MEP ou MIP pode responder

Answer 11

Verdadeiro, é possível isolar a falha no MA

Question 12

_____ measures the following performance parameters: frame loss, delay, delay variation and service availability. Its main features are alarm indication signals (ETH-AIS), remote defect indication (ETH-RDI), locked signal (ETH-LCK), test signal (ETH-Test), performance monitoring (ETH-PM), frame loss measurement (ETH-LM), frame delay measurement (ETH-DM) and client signal fail (ETH-CSF).

Answer 12

Y.1731

Question 13

_______________

This standard is also referred to as Ethernet for the First Mile (EFM) OAM.

Answer 13

IEEE 802.3ah

Question 14

O 802.3ah permite verificações ao longo de multiplos domínios já o 801.1ag permite verificações de 1 salto

Answer 14

falso, é o inverso

Question 15

The ____ uses the following mechanisms:
Discovery
Loopback,
Polling of management information base (MIB) variables, remote failing indication and link monitoring.

Answer 15

802.3ah

Question 16

Fase EFM onde as capacidades são scaneadas

Answer 16

Discovery 802.3ah / EFM

Question 17

802.3ah ____________

An OAM entity can put its remote peer into loopback mode using loopback control payload. This helps the administrator ensure link quality during installation or troubleshooting.

Answer 17

Loopback Test