Segment Routing - Traffic Engineering

Question 1

SR-TE uses a ________ to steer traffic through the network

Answer 1

policy

Question 2

An SR-TE policy path is expressed as a ___________

Answer 2

List of segments

Question 3

There are two types of SR-TE policies:

1 _________
2 _________

Answer 3

dynamic and explicit.

Question 4

Quais nodes mantém estados no SR Te

Answer 4

Apenas o headend

Question 5

Ambos SR TE e RSVP TE possuem suporte a ECMP

Answer 5

Falso

Question 6

Ambos SR TE e RSVP TE foram Engineered for SDN

Answer 6

true

Question 7

Quais entidades são responsáveis por determinar o caminho no SR TE ?

Answer 7

Node local ou headend / método distribuído

PCE / Método centralizado

Question 8

Os caminhos são escolhidos baseados em :

__________
__________

Answer 8

metrics (cost, latency, bandwidth, and so on) and constraints (color, affinity, node, and so on).

Question 9

Steering traffic onto SR-TE:

Who determines the policy: ____ or _____.

How is policy created: ___________

Answer 9

local or central

static, autoroute, BGP SR-TE dynamic

Question 10

Because many SR-TE policies require a tunnel-te interface, the term “tunnel” is also used in the context of SR-TE

Answer 10

False:

Because many SR-TE policies do not require a tunnel-te interface, the term “tunnel” is avoided in the context of SR-TE

Question 11

An ___________ is expressed as a SID list—the list of segments that specifies the path

Answer 11

SR-TE policy path

Question 12

________ segment is a fundamental building block of SR-TE:

The ________ segment is a local segment identifying an SR-TE policy:

Each SR-TE policy is associated 1-for-1 with a ________ SID.

The ________ SID can be used to steer traffic into the SR-TE policy:

Answer 12

Binding

Question 13

The ________ SID is a local label, statically or dynamically allocated for each SR-TE policy:

____________ SIDs can be manually configured if desired, per policy in some cases.

A ____________ SID can also be allocated for RSVP-TE tunnels (configurable).

The ____________-SID label is allocated when the SR-TE policy is instantiated.

Bringing down an SR-TE policy does not remove its ____________ SID.

Answer 13

Binding

Question 14

The SR-TE policy interface tunnel-te down does not remove the binding SID. If SR-TE policy is deleted, binding SID is moved to the __________________ “zombie” table. It holds on to that label for about 30 minutes

Answer 14

Label Switching Database (LSD)

Question 15

São constraints válidas:

Include and/or exclude traffic engineering affinity.

Include and/or exclude IP address.

Include and/or exclude SRLG.

Maximum accumulated metric (IGP, traffic engineering, and delay).

Maximum number of SIDs in the solution SID list.

Answer 15

true

Question 16

SR-TE can be deployed using a centralized controller, it cannot be a router or a virtualized router

Answer 16

false:

It may be simply a conventional stateful path computation element (PCE) running on a physical or virtualized router.

Question 17

Weighted ECMP SR Policy permite balancear tráfego por caminhos de custos desiguais controlando quando de tráfego pode ser enviado para cada caminho com base em suas capacidades

Answer 17

true

Question 18

No SR TE qual mecanismo primário de traffic steering ?

Answer 18

Binding SID

Question 19

______________ direciona automaticamente o tráfego para uma SR TE Policy a partir de marcações de communities color

Answer 19

O BGP SR TE Steering