Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question #1
Click the Exhibit button.
-- Exhibit -root@router> show system storage Filesystem Size Used Avail Capacity Mounted on /dev/da0s1a 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /dev devfs 1.0K 1.0K 0B 100% /dev/ /dev/md0 494M 494M 0B 100% /junos /cf 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /junos/dev/ procfs 4.0K 4.0K 0B 100% /proc /dev/bo0s3e 24M 108K 22M 0% /config /dev/bo0s3f 342M 110M 205M 35% /cf/var /dev/md1 168M 14M 141M 9% /mfs /cf/var/jail 342M 110M 205M 35% /jail/var devfs 1.0K 1.0K 0B 100% /jail/dev /dev/md2 39M 4.0K 36M 0% /mfs/var/run/utm /dev/md3 1.8M 4.0K 1.7M 0% /jail/mfs -- Exhibit -
Your device running the Junos OS has become slow and you obtain frequent errors when you try to make changes.
Referring to the exhibit, which three actions would resolve the problem? (Choose three.)

A. Enter the shell subsystem and issue the rm -rf /junos command.
B. Issue the request system storage cleanup command.
C. Issue the rollback 0 command to clear the unneeded configurations on the router.
D. Use file delete or the shell subsystem to remove files from the /var/tmp directory.
E. Issue the request system software delete-backup command.

Question #2
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. fabric drops
B. info cell drops
C. normal discard
D. hardware input drops

Question #3
Which two statements are correct about the show ospf route and the show route protocols ospf commands? (Choose two.)

A. show route protocols ospf displays the entries in the Open Shortest Path First (OSPF) routing table.
B. show route protocols ospf displays the route entries in the routing table that were learned through OSPF.
C. show ospf route displays the entries in the Open Shortest Path First (OSPF) routing table.
D. show ospf route displays the route entries in the routing table that were learned through OSPF.

Question #4
You have configured graceful Routing Engine switchover (GRES) on your device running the Junos OS. Which command would you run to ensure that GRES is functioning properly?

A. Issue the show chassis routing-engine command from the backup Routing Engine.
B. Issue the show system switchover command from the master Routing Engine.
C. Issue the show chassis routing-engine command from the master Routing Engine.
D. Issue the show system switchover command from the backup Routing Engine.

Question #5
You are asked to configure traceoptions to capture all general events for rpd.
Which configuration statement accomplishes this task?

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

Solutions: