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Juniper Junos Troubleshooting Sample Questions:

1. You are asked to configure traceoptions to capture all general events for rpd.
Which configuration statement accomplishes this task?

A) [edit routing-options]
user@router# show
traceoptions {
file rpd_log;
flag general;
}
B) [edit routing-instances]
user@router# show
traceoptions {
file rpd_log;
flag general;
}
C) [edit forwarding-options]
user@router# show
traceoptions {
file rpd_log;
flag general;
}
D) [edit protocols]
user@router# show
traceoptions {
file rpd_log;
flag general;
}

2. A client has reported that they cannot establish an FTP connection to your Junos device.
Which command would you use to diagnose the problem?

A) show interfaces extensive
B) monitor interface traffic
C) show interfaces terse
D) monitor traffic interface

3. You are asked to provide an audit trail for all user activity on your Junos device.
Which syslog configuration statement accomplishes this task?

A) user * {
any any;
}
file messages {
any notice;
authorization info;
}
B) user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file interactive-commands {
interactive-commands any;
}
C) user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file audit-commands {
authorization any;
}
D) user * {
any any;
}
file messages {
any info;
authorization info;
}

4. -- Exhibit -
user@router> show system switchover
Graceful switchover: On
Configuration databasE. Ready
Kernel databasE. Version incompatible
Peer statE. Steady State
-- Exhibit -
You have enabled graceful Routing Engine switchover (GRES). During verification, you switched mastership and all interfaces went down.
Referring to the output shown in the exhibit, why did the interfaces go down?

A) The synchronization failed because the Routing Engine models are different between the master and backup.
B) The synchronization failed because the Junos OS version on the backup is incompatible with the version running on the master.
C) The synchronization failed because the master Routing Engine cannot communicate with the backup Routing Engine.
D) The synchronization failed because the Junos OS version on the backup does not support GRES.

5. Click the Exhibit button.
-- Exhibit -user@R1> show pfe statistics traffic Packet Forwarding Engine traffic statistics:
Input packets: 47593914461368 2 pps Output packets: 28805646 3 pps Packet Forwarding Engine local traffic statistics: Local packets input : 36278104324
Local packets output : 2
Software input control plane drops : 0
Software input high drops : 0
Software input medium drops : 0
Software input low drops : 0
Software output drops : 0
Hardware input drops : 191367536738 Packet Forwarding Engine local protocol statistics:
HDLC keepalives : 0
ATM OAM : 0
Frame Relay LMI : 0
PPP LCP/NCP : 0
OSPF hello : 3883169
OSPF3 hello : 0
RSVP hello : 1440704
LDP hello : 4782297
BFD : 0
IS-IS IIH : 0
LACP : 0
ARP : 765512
ETHER OAM : 0
Unknown : 1897610 Packet Forwarding Engine hardware discard statistics:
Timeout : 0
Truncated key : 0
Bits to test : 0
Data error : 0 Stack underflow : 0 Stack overflow : 0 Normal discard : 191367536738 Extended discard : 0 Invalid interface : 0 Info cell drops : 191367536738 Fabric drops : 191367536738
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics: Input Checksum : 0 Output MTU : 0
-- Exhibit -
Referring to the exhibit, which counter indicates a possible denial of service attack?

A) hardware input drops
B) normal discard
C) info cell drops
D) fabric drops

Solutions: