EVPN

Question 1

No EVPN o problema do split horizon é resolvido usando “split horizon tag”

Answer 1

Falso, é o split horizon label

Question 2

o EVPN usa route type 1

Answer 2

verdadeiro

Question 3

O PBB-EVPN usa o route type 2

Answer 3

verdadeiro

Question 4

O PBB-EVPN necessita do split horizon label

Answer 4

falso

Question 5

Quais os tipos de rotas BGP usadas pelo EVPN-PBB

Answer 5

2, 3 e4

Question 6

O que é uma EVI ?

Answer 6

é uma EVPN instance.

Similar a uma VRF, usa RT

Question 7

Descreva a operação de mapeamento do tráfego interessante para EVI

Answer 7

Na interface física cria-se o EFP que é mapedo para um Bridge domain e este é mapeado para EVI

Question 8

o que são os ES ?

Answer 8

Ethernet Segments, são associados as interfaces customer facing. o Ethernet Segment identifier identifica um site cliente que pode estar conectado a mais de um PE, o ESI é importante para fornecer redundância

Question 9

BGP routes also signal the MPLS labels associated with MAC addresses and Ethernet segments.

Answer 9

true

Question 10

EVPN and PBB-EVPN require the signaling and maintenance of pseudowires.

Answer 10

false

Question 11

EVPN MPLS labels represent Multipoint-to-Point (MP2P) Label Switched Paths (LSPs)

Answer 11

true

Question 12

EVPN Operation
● Ethernet segment reachability: The PE discovers remote ____ and their corresponding redundancy mode __________________. In case of segment failures, PEs withdraw the routes used at this stage in order to trigger fast convergence by signaling a MAC mass withdrawal on remote PEs.

Answer 12

ESIs, (all-active or single-active)

Question 13

EVPN Operation
● Redundancy Group membership: PEs connected to the same Ethernet segment (multi-homing) automatically discover each other and elect a _____________ that is responsible for forwarding Broadcast, Unknown unicast and Mu­­­­lticast (BUM) traffic for a given EVI.

Answer 13

Designated Forwarder (DF)

Question 14

● VPN membership: The PE discovers all remote PE members of a given ___. In the case of a multicast ingress replication model, this information is used to build the PE’s flood list associated with an ___ .

Answer 14

EVI

EVI = VRF L2

Question 15

Após troca de rotas, quando um frame cliente chega ao PE ele anuncia ___ __________ _______ routes distribute reachability information no CORE

Answer 15

EVPN MAC advertisement

Question 16

Terminology EVPN PBB

When it comes to PBB-EVPN though, there’s two types of BDs, the ___________ and the ______________. TERM 1 is where the Attachment Circuits (interfaces connected towards customers) are included as part of the BD. That means all the Customer-MAC address (C-MAC) are part of this broadcast domain. TERM 2 mainly contains the B-MAC, basically the Mac-Addresses of each Provider Edge devices (for reachability purposes) within the same MPLS network.

Answer 16

Edge Bridge Domain

Core Bridge Domain

Question 17

_____: Service Instance Identifier, serves the purpose of identifying the service instance. It is a best practice to keep the i-SID values unique per customer service instance.

Answer 17

i-SID

Question 18

The real reason is the flexibility of PBB-EVPN based L2 Services, the way how it reduces the BGP MAC advertisement by aggregating the ______via _____ addresses (Mapping of Customer Mac addresses to Backbone Mac addresses)

Answer 18

C-MAC

B-MAC