JNCIA JUNIPER – questões interessantes RPD e MDG

Which process is responsible for the routing protocols on a Junos device?

  1. rpd
  2. mgd
  3. dcd
  4. chassisd

Answer: 1

Fonte para pesquisa sobre o rpd, https://www.juniper.net/documentation/en_US/junos/topics/task/verification/rpd-memory-usage.html

 

Which process is responsible for the configuration of the router and all user commands on a Junos device?

  1. rpd
  2. chassisd
  3. dcd
  4. mgd

Answer: 4

Mais alguns processos que correm nesse caixa top!

Destaque pro mdg que é como um daemon que fica de meio campo falando com os outros processos e caso, alguma requisição pare ele restarta o pedido.

 

Process

Name

Description

Chassis process

chassisd

Detects hardware on the system that is used to configure network interfaces.

Monitors the physical status of hardware components and field-replaceable units (FRUs), detecting when environment sensors such as temperature sensors are triggered.

Relays signals and interrupts—for example, when devices are taken offline, so that the system can close sessions and shut down gracefully.

Ethernet switching process

eswd

Handles Layer 2 switching functionality such as MAC address learning, Spanning Tree Protocol and access port security. The process is also responsible for managing Ethernet switching interfaces, VLANs, and VLAN interfaces.

Manages Ethernet switching interfaces, VLANs, and VLAN interfaces.

Note: The process is not applicable for EX2300 and EX3400 switches

Forwarding process

pfem

Defines how routing protocols operate on the switch. The overall performance of the switch is largely determined by the effectiveness of the forwarding process.

Interface process

dcd

Configures and monitors network interfaces by defining physical characteristics such as link encapsulation, hold times, and keepalive timers.

Management process

mgd

Provides communication between the other processes and an interface to the configuration database.

Populates the configuration database with configuration information and retrieves the information when queried by other processes to ensure that the system operates as configured.

Interacts with the other processes when commands are issued through one of the user interfaces on the switch.

If a process terminates or fails to start when called, the management process attempts to restart it a limited number of times to prevent thrashing and logs any failure information for further investigation.

Routing protocol process

rpd

Defines how routing protocols such as RIP, OSPF, and BGP operate on the device, including selecting routes and maintaining forwarding tables.

 

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