Network Management

Question 1

What are the 3 major components of SNMP?

Answer 1

SNMP Manager
SNMP Agent
MiB

Question 2

SNMP manager

Answer 2

The SNMP manager controls and monitors the devices within the network by using SNMP. The SNMP manager can be part of an NMS such as Cisco Prime Infrastructure.

Question 3

SNMP agent

Answer 3

The SNMP agent is the component that is run directly on the device and maintains data and reports this data (if needed) to the SNMP manager

Question 4

MiB

Answer 4

MIB is a virtual information storage location that contains collections of managed objects. Within the MIB, there are objects that relate to different defined MIB modules (for example, the interface module).

Question 5

What is the major flaw with SNMPv1?

Answer 5

it sends everything in plain text with the community string being the only authentication

Question 6

What changed in SNMPv2?

Answer 6

adds bulk collection mechanism but still uses plain text community string authentication

Question 7

What is new in SNMPv3?

Answer 7

It adds support for strong authentication and private communication between managed entities. The key security additions to SNMPv3 follow:
Can use MD5 or SHA hashes for authentication
Can encrypt the entire packet
Can guarantee message integrity

Question 8

SNMP configurations tasks

Answer 8

Task
Command Syntax
Configure the SNMP contact information
Router(config)# snmp-server contact text
Configure the SNMP device location
Router(config)# snmp-server location text
Configure the SNMP device serial number
Router(config)# snmp-server chassis-id number
Display the current SNMP contact information
Router# show snmp contact
Display the current SNMP device location
Router# show snmp location
Display the current SNMP device serial number
Router# show snmp chassis

Question 9

command to set syslog server

Answer 9

logging ip of syslog server

Question 10

command to serverity level required a messaged to sent to syslog server

Answer 10

logging trap severity level

Question 11

What is netflow?

Answer 11

A feature of some routers that allows them to categorize incoming packets into flows. Because packets in a flow often can be treated in the same way, this classification can be used to bypass some of the work of the router and accelerate its switching operation.

Question 12

command to enable netflow on an interface

Answer 12

ip flow {ingress | egress}

Question 13

command to set recipient of netflow data

Answer 13

ip flow-export destination ip-address udp-port

Question 14

command to specify the netflow version the export uses

Answer 14

ip flow-export version version