Junos Troubleshooting - GRATIS EXAM · Which three statements are correct about rpd related troubleshooting on devices running the Junos OS? (Choose three.) A. A log for rpd scheduler

Junos Troubleshooting

Number: JN0-690Passing Score: 800Time Limit: 90 minFile Version: 4.0

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Junos Troubleshootingv4.070 questions

Exam A

QUESTION 1Which CLI command is used to restart a software process?

A. restartB. rebootC. commitD. reload

Correct Answer: BSection: (none)Explanation

Explanation/Reference:Explanation:

QUESTION 2Which CLI command applies the candidate configuration to the active configuration?

A. loadB. mergeC. copy run startD. commit

Correct Answer: CSection: (none)Explanation


QUESTION 3Which operational CLI command would you use to troubleshoot hardware-related problems?

A. show systemB. show chassisC. show routeD. show cli



QUESTION 4In the Junos OS, which type of file dumps the program's environment in the form of memory pointers,instructions, and register data to a file in the event of a panic or other serious malfunction?

A. log fileB. backup fileC. configuration fileD. core file



QUESTION 5Which operational CLI command would you use to display information about the system and softwareprocesses?

A. show systemB. show chassisC. show routeD. show cli



QUESTION 6What is the name of the routing protocol process on a Junos OS device?


A. chassisdB. snmpdC. rpdD. cosd

Correct Answer: DSection: (none)Explanation


QUESTION 7Which statement is correct about troubleshooting?

A. You must always have a complete understanding of the problem before you begin gathering anyinformation.

B. You must be sure the problem will be resolved before attempting a potential solution.C. The problem must be reproducible before attempting a potential solution.D. Establishing a network baseline is important to help understand when something is not working.



QUESTION 8Which three steps are involved in troubleshooting any problem? (Choose three.)

A. Reboot the device.B. Clearly define the problem.C. Outline the expected behavior.D. Determine who made the changes.E. Isolate the problem.

Correct Answer: BCESection: (none)Explanation


QUESTION 9Which operational command would be used to display diagnostic data and alarms for 1/10/100 Gigabit Ethernetoptical transceivers?

A. show interfaces extensiveB. show interfaces diagnostics opticsC. show chassis alarmsD. show interfaces controller



QUESTION 10Which command would be helpful in determining the time at which the protocols started?

A. show routeB. show chassis hardwareC. show configurationD. show system uptime



QUESTION 11

Which command is useful in testing the correct operation of an SNMP configuration toward an NMS?

A. show snmp rmonB. show snmp mibC. show snmp v3D. request snmp spoof-trap



QUESTION 12Which two Junos OS commands are helpful in confirming whether an Object Identifier (OID) has recorded thecorrect data? (Choose two.)

A. show snmp mib getB. show snmp statisticsC. show snmp v3D. show snmp mib walk

Correct Answer: ADSection: (none)Explanation


QUESTION 13"Pass Any Exam. Any Time." - www.actualtests.com 5Juniper JN0-690 ExamGiven the example shown below:

Emergency boot media > flash disk > _____

What is missing from the default boot list?

A. LANB. USBC. PCMCIA cardD. hard disk



QUESTION 14You are notified about a router reboot event.

Which command would be helpful in determining the reason for the last reboot?

A. show chassis craft-interfaceB. show system rebootC. show chassis routing-engineD. show system snapshot



QUESTION 15A technician has reported an alarm on your device running the Junos OS. You suspect it is due to thetemperature in the rack. Which two commands will confirm your suspicion? (Choose two.)

A. show chassis alarmsB. show chassis firmwareC. show chassis hardwareD. show chassis environment



QUESTION 16Which process is responsible for managing interface devices on the system?

A. chassis daemonB. device control daemonC. routing protocol processD. management daemon



QUESTION 17Which CLI command would be used to verify the routing protocol daemon memory usage?

A. show route summaryB. show route detailC. show system processes extensiveD. show chassis routing-engine



QUESTION 18Which command would be used to clear stuck user sessions?

A. request system rebootB. request system logoutC. request chassis routing-engine master switchD. request routing-engine login other-routing-engine



QUESTION 19You want to reset all the PFE components with graceful Routing Engine switchover (GRES) disabled on thesystem. Which command should you use?

A. restart chassis-control softB. restart chassis-control immediatelyC. restart chassis-controlD. restart routing



QUESTION 20What controls the CLI process?

A. chassis control daemonB. management daemonC. routing protocol processD. device control daemon



QUESTION 21Which three statements are correct about ARP related troubleshooting? (Choose three.)

A. Most devices that run the Junos OS allow you to specify a manual ARP entry.B. The monitor traffic interface <interface-name> command can be used to watch ARP packets.C. There are no default ARP policers on any devices running the Junos OS.

D. An individual ARP entry can be cleared using the clear arp hostname command.E. The clear arp command also clears the IPv6 neighbor cache.

Correct Answer: ABDSection: (none)Explanation


QUESTION 22In Junos, which process has its own internal task scheduler?

A. chassisdB. rpdC. mgdD. ppmd



QUESTION 23Which three statements are correct about rpd related troubleshooting on devices running the Junos OS?(Choose three.)

A. A log for rpd scheduler slip is an indication of something that should be investigated and resolved.B. A log for rpd scheduler slip is a common, harmless syslog and can be ignored.C. A possible cause for an overworked rpd is excessive protocol tracing.D. A possible method to troubleshoot rpd scheduler slips is to temporarily enable task accounting.E. Excessive protocol tracing can never be a cause for an overworked rpd.

Correct Answer: ACDSection: (none)Explanation


QUESTION 24You suspect that your router is missing the .0/24 routes for your local network. You first want to look for theroutes on the control plane before troubleshooting the data plane.

Which operational mode command should you issue?

A. show route forwarding-tableB. show route flow validation tableC. show routeD. show arp

Correct Answer: CSection: (none)

Explanation


QUESTION 25You 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 any;}file messages {any info;authorization info;}

C. user * {any emergency;}file messages {any notice;authorization info;}file interactive-commands {interactive-commands any;}

D. user * {any emergency;}file messages {any notice;authorization info;}file audit-commands {authorization any;}



QUESTION 26You are asked to configure traceoptions to capture all general events for rpd.

Which configuration statement accomplishes this task?

A. [edit routing-options]

user@router# showtraceoptions {file rpd_log;flag general;}

B. [edit routing-instances]user@router# showtraceoptions {file rpd_log;flag general;}

C. [edit forwarding-options]user@router# showtraceoptions {file rpd_log;flag general;}

D. [edit protocols]user@router# showtraceoptions {file rpd_log;flag general;}

Correct Answer: ASection: (none)Explanation


QUESTION 27Which two statements are true about firewall filters and policers? (Choose two.)

A. If an input firewall filter is configured on the same logical interface as a policer, the firewall filter is executedfirst.

B. If an output firewall filter is configured on the same logical interface as a policer, the policer is executed first.C. If an input firewall filter is configured on the same logical interface as a policer, the policer is executed first.D. If an output firewall filter is configured on the same logical interface as a policer, the firewall filter is executed

first.

Correct Answer: CDSection: (none)Explanation


QUESTION 28You have been asked to troubleshoot an interface that is flapping.

Which three tools would you use to isolate the cause? (Choose three.)

A. syslog messagesB. ping utilityC. loopback interface testing

D. show interfacesE. PFE statistics



QUESTION 29Which two commands help to identify traffic drops due to oversubscription? (Choose two.)

A. show interfaces extensiveB. show interfaces queueC. monitor interface trafficD. monitor traffic interface

Correct Answer: ABSection: (none)Explanation


QUESTION 30Which two features would be deployed to prevent DoS attacks? (Choose two.)

A. Bidirectional Forward Detection (BFD)B. ARP policerC. loopback filterD. periodic packet management (PPM)

Correct Answer: BCSection: (none)Explanation


QUESTION 31Which three commands will provide details about CPU utilization on a line card? (Choose three.)

A. show chassis fpcB. show chassis hardwareC. request pfe execute target fpc1 command "show sched"D. request pfe execute target fpc1 command "show thread"E. request pfe execute target fpc1 command "show arp"



QUESTION 32Which two statements are true regarding BGP path MTU discovery? (Choose two.)

A. BGP path MTU discovery provides the most efficient use of link bandwidth.B. BGP path MTU discovery alleviates fragmentation problems.C. BGP path MTU discovery must be configured on every router along the path.D. BGP path MTU discovery can be enabled only for IBGP sessions.



QUESTION 33A 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 terseB. monitor interface trafficC. monitor traffic interfaceD. show interfaces extensive



QUESTION 34An interface on your Junos device reports a device-level flag of Loopback-detected.

What is causing this flag to be reported?

A. The link-layer protocol failed to successfully connect with the remote endpoint.B. The interface was administratively disabled.C. The interface is in promiscuous mode and sees frames addressed to all physical addresses on the medium.D. The interface link layer received its own frames.



QUESTION 35Two neighboring routers running OSPF were configured with the same router ID by mistake.

Which OSPF operational mode command would report the number of hello packets received with the localrouter's router ID?

A. show ospf routeB. show ospf logC. show ospf statisticsD. show ospf io-statistics



QUESTION 36Which two statements are correct about the show ospf route and the show route protocols ospf commands?(Choose two.)

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



QUESTION 37Which two tools would be used to troubleshoot BGP peering problems? (Choose two.)

A. traceoptionsB. the monitor traffic interface commandC. the inet.3 routing tableD. the link-state database



QUESTION 38Which two tools will help determine the path of a routing loop? (Choose two.)

A. tracerouteB. traceoptionsC. routing table dataD. SNMP

Correct Answer: ACSection: (none)Explanation


QUESTION 39Which route would a packet destined to 192.168.14. take?

A. 192.168.14.0/24 *[BGP/100]B. 192.168.14.0/24 *[BGP/70]C. 192.168.14.0/24 *[BGP/200]D. 192.168.64.0/21 *[Direct/0]



QUESTION 40By default, in which table are OSPF routes stored on a Junos device?

A. inet.0B. inet.1C. inet.2D. inet.3



QUESTION 41An OSPF neighbor is stuck in the Exchange state.

Which condition would cause this to happen?

A. a mismatched areaB. mismatched authenticationC. a mismatched IP subnetD. a mismatched MTU



QUESTION 42A customer operates a multi-vendor production network. They report that LSAs are aging out on Junos devices.Which OSPF parameter must be tuned to prevent this behavior?

A. LSA refresh interval

B. hello intervalC. dead intervalD. LSA retransmission interval



QUESTION 43You have configured graceful Routing Engine switchover (GRES) on your device running the Junos OS. Whichcommand would you run to ensure that GRES is functioning properly?

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



QUESTION 44Which two actions are required when performing a unified in-service software upgrade (ISSU)? (Choose two.)

A. You must enable nonstop active routing (NSR).B. You must enable graceful Routing Engine switchover (GRES).C. You must disable graceful Routing Engine switchover (GRES) if the Layer 2 Control Protocol is in use.D. You must disable nonstop bridging (NSB) if the Layer 2 Control Protocol is in use.



QUESTION 45Which three statements are true about performing an ISSU on a Junos device? (Choose three.)

A. Every PFE on each FPC downloads the new software from the backup RE.B. ksyncd synchronizes the kernel on the backup RE with the master RE.C. The backup RE verifies disk space on both REs, unsupported configurations, and unsupported PICs.D. The master RE verifies disk space on both REs, unsupported configurations, and unsupported PICs.E. Any unsupported PICs will cause the ISSU process to fail with "Error: incompatible hardware detected."



QUESTION 46Using Virtual Router Redundancy Protocol (VRRP), you want to statically force the priorities of the master andbackup routers. Which priority would you set on the master router?

A. 0B. 1C. 128D. 254



QUESTION 47You have configured and successfully committed the configuration for nonstop active routing (NSR). Whichcommand would you use to determine if NSR is operating correctly?

A. Use the show system synchronization command on the master and the backup Routing Engines.B. Use the show task replication command only on the master Routing Engine.C. Use the show task replication command on the master and the backup Routing Engines.D. Use the show system synchronization command only on the master Routing Engine.



QUESTION 48Click the Exhibit button.

-- Exhibit

user@router> show configuration system services | display inheritance

ssh;

telnet;

-- Exhibit --

Referring to the exhibit, which two statements are true? (Choose two.)

A. Inbound FTP connections to the router would not work.B. Outbound FTP connections initiated from the router would not work.C. Inbound FTP connections to the router would work.D. Outbound FTP connections initiated from the router would work.

Correct Answer: AD

Section: (none)Explanation



-- Exhibit --

user@router> show snmp statistics

SNMP statistics:

Input:

Packets: 246213, Bad versions: 12, Bad community names: 12,

Bad community uses: 0, ASN parse errors: 0,

Too bigs: 0, No such names: 0, Bad values: 0,

Read onlys: 0, General errors: 0,

Total request varbinds: 227084, Total set varbinds: 67,

Get requests: 44942, Get nexts: 1 , Set requests: 10712,

Get responses: 0, Traps: 0,

Silent drops: 0, Proxy drops: 0, Commit pending drops: 0,

Throttle drops: 0,

V3 Input:

Unknown security models: 0, Invalid messages: 0

Unknown pdu handlers: 0, Unavailable contexts: 0

Unknown contexts: 0, Unsupported security levels: 0

Not in time windows: 0, Unknown user names: 0

Unknown engine ids: 0, Wrong digests: 0, Decryption errors: 0

Output:

Packets: 246093, Too bigs: 0, No such names: 0,

Bad values: 0, General errors: 0,

Get requests: 0, Get nexts: 0, Set requests: 0,

Get responses: 246025, Traps: 0

-- Exhibit --

A new SNMP session has recently been implemented on this router and is experiencing problems sending and

receiving SNMP information.

Referring to the exhibit, which two problems are indicated by the received messages from the

NMS? (Choose two.)

A. unsupported SNMP community nameB. unknown SNMP community nameC. unsupported SNMP version indicatedD. invalid SNMP version indicated

Correct Answer: BCSection: (none)Explanation



-- Exhibit --

=================== Bootstrap installer starting ===================

Initialized the environment

Routing engine model is RE-S-1800x4

Discovered that flash disk = ad0 , hard disk = ad1

mount: /dev/ad1s1f : Invalid argument

ERROR: mount_partition: Mount /dev/ad1s1a /mnt failed

You are now in a debugging subshell (you may not see a prompt)...

#

-- Exhibit --

During the boot of your MX480, you see the output shown in the exhibit.

Which three statements are true? (Choose three.)

A. The Routing Engine cannot mount the partition to complete booting.B. Running fsck on the partition might resolve the boot problem.C. You must swap the Routing Engine over to the backup slot to get it to boot properly.D. The boot failed because one of the file systems is in an inconsistent state.E. The boot failed because a USB drive has been inserted into the device.




-- 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 makechanges.

Referring to the exhibit, which three actions would resolve the problem? (Choose three.)

A. Issue the rollback 0 command to clear the unneeded configurations on the router.B. Issue the request system storage cleanup command.C. Enter the shell subsystem and issue the rm -rf /junos command.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.

Correct Answer: BDESection: (none)Explanation


QUESTION 52

Click the Exhibit button.

-- Exhibit --

user@host> request system software add

...

WARNING: The /var filesystem is low on free disk space.

WARNING: This package requires 1 k free, but there

WARNING: is only 666502k available.

-- Exhibit --

Which three commands are useful in identifying and addressing the cause of the lack of disk space? (Choosethree.)

A. show chassis routing-engineB. show system storageC. show system directory-usageD. request system software add validateE. request system storage cleanup

Correct Answer: BCESection: (none)Explanation



-- Exhibit --

Slot 0 information:

State Online

Total CPU DRAM ---- CPU less FPC ----

Start time 2012-07-07 03:21:00 UTC

Uptime 27 minutes, 51 seconds

Slot 1 information:

State Present

Reason --- Hardware Not In Right Slot ---

Slot 2 information:

State Online

Total CPU DRAM 32 MB

Start time 2012-07-07 03:20:59 UTC


Slot 3 information:

State Present

Reason --- Hardware Not Supported ---

Total CPU DRAM 0 MB

Slot 6 information:

State Online

Total CPU DRAM 32 MB

Start time 2012-07-07 03:21:01 UTC


-- Exhibit --

Referring to the exhibit, which three statements are true? (Choose three.)

A. The Control Board in slot 6 is online and working.B. The card in slot 3 is not supported by the chassis.C. The Control Board in slot 0 has a missing CPU.D. The Flexible PIC Concentrator (FPC) in slot 1 is not installed properly for this chassis.E. The Flexible PIC Concentrator (FPC) in slot 6 is online and working.




-- Exhibit --

user@router> show chassis environment

Class Item Status Measurement

Power Power Supply A OK

Power Supply B Absent

Temp FPC 0 OK 28 degrees C / 82 degrees F

FPC 1 OK 27 degrees C / 80 degrees F

Power Supply A OK 22 degrees C / 71 degrees F

Power Supply B Absent

SSB 0 OK 30 degrees C / 86 degrees F

Backplane OK 22 degrees C / 71 degrees F

Routing Engine 0 OK 26 degrees C / 78 degrees F

Routing Engine 1 Testing

Fans Rear Fan OK Spinning at normal speed

Front Upper Fan OK Spinning at normal speed

Front Middle Fan OK Spinning at normal speed

Front Bottom Fan OK Spinning at normal speed

Misc Craft Interface OK

-- Exhibit --

Referring to the exhibit, which two statements are true about the chassis? (Choose two.)

A. Power Supply B is not installed in the system.B. Power Supply B is installed in the system but has failed.C. Routing Engine 1 has failed.D. Routing Engine 1 is installed in the system but is still initializing.




-- Exhibit --

user@host > show chassis craft-interface

Front Panel System LEDs:

Routing Engine 0 1


--------------------------

OK * .

Fail . *

Master * .

Front Panel Alarm Indicators:

-----------------------------

Red LED .

Yellow LED *

Major relay .

Minor relay *

Front Panel FPC LEDs:

FPC 0 1 2 3 4 5 6 7 8 9

-----------------------------------------------------

Red . . . . . . . . . .

Green * * . . . . . . * *

CB LEDs:

CB 0 1

------------

Amber . .

Green * *

PS LEDs:

PS 0 1 2 3 4 5 6 7 8

-------------------------------------------------

Red . . . . . . . . .

Green . . . . * * * * *

Fan Tray LEDs:

FT 0 1 2 3

--------------------

Red . . . .

Green * * * *

Front Panel SFB LEDs:

SFB 0 1 2 3 4 5 6 7

------------------------------------

Red . . . . . . . .

Green * * * * * * * *

Front Panel Chassis Info:

Chassis Number 0x0

Chassis Role S

-- Exhibit --

Referring to the exhibit, which statement is true?

A. Routing Engine 1 is OK, the red LED is lit, and the major alarm relay is on.B. Routing Engine 1 has failed, yellow LED is lit, and the minor alarm relay is on.C. Routing Engine 1 is OK, the red LED is lit, and the minor alarm relay is on.D. Routing Engine 1 has failed, yellow LED is lit, and the major alarm relay is on.




-- Exhibit --

user@router> show system processes extensive

last piD. 4160; load averages: 0.13, 0.08, 0.07 up 2+02:47:50 21:13:39

120 processes: 17 running, 90 sleeping, 1 zombie, 12 waiting

Mem: 141M Active, 96M Inact, 517M Wired, 160M Cache, 112M Buf, 55M Free

Swap:

PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND

1271 root 7 76 0 514M 63724K select 0 157.9H 280.42% flowd_octeon_hm

22 root 1 171 52 0K 16K RUN 0 43.3H 83.45% idlE. cpu0

4158 lab 1 78 0 49192K 16440K select 0 0:00 2.25% cli

1255 root 1 76 0 114M 17604K select 0 41:47 0.00% chassisd

24 root 1 -20 -139 0K 16K WAIT 0 18:50 0.00% swi7: clock

1293 root 1 76 0 12476K 6484K select 0 9:25 0.00% license-check

4159 root 1 76 0 38608K 5720K select 0 0:00 0.00% mgd

...

36 root 1 8 0 0K 16K usbevt 0 0:00 0.00% usb1

33 root 1 8 0 0K 16K usbevt 0 0:00 0.00% usb0

4160 root 1 77 0 24260K 1816K CPU0 0 0:00 0.00% top

1176 root 1 -8 0 0K 16K mdwait 0 0:00 0.00% md2

7 root 1 8 0 0K 16K - 0 0:00 0.00% thread taskq

1186 root 1 -8 0 0K 16K mdwait 0 0:00 0.00% md3

0 root 1 -8 0 0K 0K WAIT 0 0:00 0.00% swapper

-- Exhibit --

Referring to the exhibit, which Junos OS process was the last one to start?

A. flowd_octeon_hmB. topC. swapperD. cli




-- Exhibit --

user@router> show system users

9:28PM up 2 days, 3:02, 2 users, load averages: 0.06, 0.13, 0.09

USER TTY FROM LOGIN@ IDLE WHAT

lab u0 - 9:13PM - -cli (cli)

admin p0 10.210.15.30 9:45PM - -cli (cli)

-- Exhibit --

Referring to the exhibit, which two statements are true? (Choose two.)

A. The admin user is connected through a console session.B. The admin user is connected through a Telnet or SSH session.C. Both user sessions will be cleared after issuing the command request system logout terminal.D. The lab user's session will be cleared after issuing the command request system logout user lab.

Correct Answer: BDSection: (none)Explanation



-- Exhibit --

user@R1> show route 2.2.2.2

user@R1> show route forwarding-table destination 2.2.2.2

Routing table: default.inet

Internet:

Destination Type RtRef Next hop Type Index NhRef Netif

2.2.2.2/32 user 1 17.1.1.2 ucst 642 9 xe-1/1/0.0

-- Exhibit --

Referring to the exhibit, which statement is true about transit traffic sent to 2.2.2.2?

A. R1 will discard the packet.B. R1 will forward the packet.C. R1 will redirect the packet to the Routing Engine.D. R1 will reject the packet.




-- Exhibit --

user@R1> show route forwarding-table destination 2.2.2.2

user@R1> show route 2.2.2.2

inet.0: 10 destinations, 10 routes (10 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

2.2.2.2/32 *[OSPF/10] 2w3d 22:19:41, metric 1

> to 17.1.1.2 via xe-1/1/0.0

-- Exhibit --

Referring to the exhibit, which statement is true about transit traffic sent to 2.2.2.2?

A. R1 will discard the packet.B. R1 will forward the packet.C. R1 will redirect the packet to the Routing Engine.D. R1 will reject the packet.




-- 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 dropsB. normal discardC. info cell dropsD. fabric drops




-- Exhibit --

user@R1> show configuration interfaces

xe-1/1/0 {

unit 0 {

family inet {

address 17.1.1.1/24;

}

family mpls;

}

}

user@R1> ping 17.1.1.2 size 1473 do-not-fragment

PING 17.1.1.2 (17.1.1.2): 1473 data bytes

ping: sendto: Message too long



user@R1> ping 17.1.1.2 logical-system R1 size 1472 do-not-fragment

PING 17.1.1.2 (17.1.1.2): 1472 data bytes

1480 bytes from 17.1.1.2: icmp_seq=0 ttl=64 time=0.933 ms



-- Exhibit --

You are using the ping command to troubleshoot a suspected MTU problem.

A. Referring to the exhibit, which two statements are true? (Choose two.) The first ping fails because the do-not-fragment option is set.

B. The first ping fails because the Junos OS takes into account Layer 2 headers while calculating the MTU.C. The first ping fails because the Junos OS takes into account ICMP and IP headers while calculating the

MTU.D. The first ping fails because the Junos OS takes into account the CRC header while calculating the MTU.

Correct Answer: ACSection: (none)Explanation



-- Exhibit --

user@R1> show configuration interfaces lo0

unit 5 {

family inet {

filter {

input JUNOS;

}

address 5.5.5.5/32;

}

}

user@R1> show configuration firewall family inet filter JUNOS

term term1 {

from {

protocol tcp;

port [ telnet ftp ftp-data snmp ssh syslog http tacacs 64644 1024-65535 ];

}

then {

log;

accept;

}

}

term default {

then {

discard;

}

}

-- Exhibit --

Referring to the exhibit, which three statements are true? (Choose three.)

A. R1 will drop all traffic with destination address 5.5.5.5.B. R1 will drop all OSPF packets.C. R1 will drop all non-TCP transit traffic.D. R1 will accept telnet traffic.E. R1 will drop all BGP packets.




-- Exhibit --

user@r2# run show route 100.1.1.0/24 detail

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)

100.1.1.0/24 (1 entry, 1 announced)

*Static PreferencE. 5

Next hop typE. Reject

Address: 0x8f7b5a4

Next-hop reference count: 2

StatE.

Local AS: 65001

AgE. 59

Task: RT

Announcement bits (1): 2-KRT

AS path: 65005 I

user@r2# show protocols bgp

group ibgp {

type external;

export to-bgp;

neighbor 10.1.2.1 {

local-address 10.1.2.2;

family inet {

unicast;

}

family inet6 {

unicast;

}

peer-as 65005;

}

}

user@r2# run show bgp summary

Groups: 1 Peers: 1 Down peers: 0

Table Tot Paths Act Paths Suppressed History Damp State Pending

inet6.0

0 0 0 0 0 0

inet.0

0 0 0 0 0 0

Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

10.1.2.1 65005 31 31 0 0 12:08 Establ

inet6.0: 0/0/0/0

inet.0: 0/0/0/

user@r2# show policy-options

policy-statement to-bgp {

from protocol static;

then accept;

}

user@r2# run show route advertising-protocol bgp 10.1.2.1

[edit]

user@r2#

-- Exhibit --

Referring to the exhibit, router r2 does not advertise the static route to peer 10.1.2.1.

What is the problem?

A. The export policy is incorrect.B. The static route has Next hop typE.Reject.C. The export policy should be applied under the [edit protocols bgp group ibgp neighbor 10.1.2.1] hierarchy.D. An AS path loop is detected.



QUESTION 64-- Exhibit --

Local traffic capture on r1:

Address resolution is OFF.

Listening on ge-5/3/0.0, capture size 1514 bytes

22:16:33.610374 Out IP (tos 0xc0, ttl 1, id 34562, offset 0, flags [none], proto: OSPF (89), length:76) 10.1.2.1 > 224.0.0.5: OSPFv2, Hello, length 56 [len 44]

Router-ID 1.1.1.1, Backbone Area, Authentication TypE. none (0)

Options [External, LLS]

Hello Timer 10s, Dead Timer 40s, Mask 255.255.255.252, Priority 128

LLS: checksum: 0xfff6, length: 3

Extended Options (1), length: 4

Options: 0x00000001 [LSDB resync]

[edit]

user@r1# run show ospf interface

Interface State Area DR ID BDR ID Nbrs

ge-5/3/0.0 PtToPt 0.0.0.0 0.0.0.0 0.0.0.0 0

lo0.1 DR 0.0.0.0 1.1.1.1 0.0.0.0 0

[edit]

user@r1# run show ospf neighbor

-------------------------------------------------------------------------

Local traffic capture on r2:

Address resolution is OFF.

Listening on ge-5/3/1.0, capture size 1514 bytes

22:16:42.238030 Out IP6 (class 0xc0, hlim 1, next-header: OSPF (89), length: 36) fe80::6687:88ff:fe6c:6769 >ff02::5: OSPFv3, Hello, length 36

Router-ID 2.2.2.2, Backbone Area

Options [V6, External, Router]

Hello Timer 10s, Dead Timer 40s, Interface-ID 0.0.0.1, Priority 128

Neighbor List:

user@r2# run show ospf interface

OSPF instance is not running

-- Exhibit --

Click the Exhibit button.

Referring to the exhibit, routers r1 and r2 are connected to each other by interfaces ge-5/3/0 and ge-5/3/1respectively. They do not become OSPF neighbors.

Which two statements are true? (Choose two.)

A. r1 is configured for OSPFv3.B. r1 is configured for OSPFv2.C. r2 is configured for OSPFv2.D. r2 is configured for OSPFv3.




-- Exhibit --

May 20 22:27:04.010297 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0)

May 20 22:27:04.010320 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1

May 20 22:27:04.010342 checksum 0x166d, authtype 0

May 20 22:27:04.010365 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128

May 20 22:27:04.010387 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0

May 20 22:27:07.891698 OSPF periodic xmit from 192.168.0.1 to 224.0.0.5 (IFL 2684276180 area 0.0.0.0)

May 20 22:27:12.749988 OSPF packet ignored: area mismatch (0.0.0.1) from 192.168.0.2 on intf ge-1/1/2.0area 0.0.0.0



May 20 22:27:12.750116 checksum 0x166d, authtype 0





May 20 22:27:14.393284 checksum 0x0, authtype 0



May 20 22:27:14.393399 OSPF packet ignored: our router ID received from 192.168.0.2 on intf ge-1/1/2.0 area0.0.0.0

-- Exhibit --

Referring to the exhibit, which two OSPF adjacency problems are present? (Choose two.)

A. hello interval mismatchB. duplicate router IDC. area type mismatchD. area number mismatch




-- Exhibit --

[edit]

user@router# show interfaces

ge-1/1/2 {

vlan-tagging;

unit 100 {

vlan-id 100;

family inet {

address 192.168.0.1/30;

}

}

}

lo0 {

unit 0 {

family inet {

address 10.10.10.1/32;

}

}

}

[edit]

user@router# show protocols ospf

area 0.0.0.0 {

interface ge-1/1/2.0 {

interface-type p2p;

metric 250;

}

interface lo0.0;

}

[edit]

user@router# run show ospf interface

Interface State Area DR ID BDR ID Nbrs

lo0.0 DR 0.0.0.0 10.10.10.1 0.0.0.0 0

[edit]

user@router#

-- Exhibit --

Referring to the exhibit, why does only the loopback interface appear in the show ospf interface output?

A. The interface-type is not configured properly on the ge-1/1/2 interface.B. The incorrect logical unit for the ge-1/1/2 interface is configured under the OSPF hierarchy.C. The ge-1/1/2 interface is configured under the wrong OSPF area.D. The metric configured on ge-1/1/2 is not valid.

Correct Answer: BSection: (none)

Explanation



You recently added an EBGP neighbor to R1 and you are receiving a single BGP route for their internalnetwork. You notice that on R2 the route learned from C1 is being marked as hidden because the next hop isunusable.

Referring to the exhibit, what should you do to resolve the problem?

Exhibit:

A. Create a next-hop-self import policy on R2 and apply this policy to IBGP.B. Create a next-hop-self export policy on R1 and apply this policy to IBGP.C. Create a next-hop-self import policy on R1 and apply this policy to EBGP.D. Create a next-hop-self import policy and apply this policy to IBGP.




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 mastershipand all interfaces went down.

Referring to the output shown in the exhibit, why did the interfaces go down?

A. The synchronization failed because the Junos OS version on the backup is incompatible with the versionrunning on the master.

B. The synchronization failed because the Junos OS version on the backup does not support GRES.C. The synchronization failed because the Routing Engine models are different between the master and

backup.D. The synchronization failed because the master Routing Engine cannot communicate with the backup

Routing Engine.




[edit]

user@router# show interfaces

ge-1/1/2 {

gigether-options {

802.3ad ae0;

}

}

ge-1/1/3 {

gigether-options {

802.3ad ae0;

}

}

ae0 {

unit 0 {

family bridge {

interface-mode trunk;

vlan-id-list 100;

}

}

}

-- Exhibit --

You are asked to configure a LAG. You configure and commit the configuration as shown in the exhibit. Whenverifying your ae0 interface, you encounter the following error:

[edit]

user@router# run show interfaces ae0

error: device ae0 not found

Which command would you use to resolve this problem?

A. set interfaces ae0 aggregated-ether-options lacp activeB. set chassis alarm ethernet link-down ignoreC. set chassis network-services ethernetD. set chassis aggregated-devices ethernet device-count 1




[edit]

user@R1# run show interfaces ge-1/1/2 terse

Interface Admin Link Proto Local Remote

ge-1/1/2 up up

ge-1/1/2.0 up up aenet --> ae0.0

[edit]



ge-1/1/3 up up


[edit]

user@R1# run show interfaces ae0 terse


ae0 up down

ae0.0 up down bridge

[edit]

user@R1# show interfaces ae0

aggregated-ether-options {

lacp {

periodic slow;

system-priority 200;

}

}

unit 0 {

family bridge {


vlan-id-list 100;

}

}

**************************************************************************

[edit]



ge-1/1/2 up up


[edit]



ge-1/1/3 up up


[edit]

user@R2# run show interfaces ae0 terse


ae0 up down

ae0.0 up down bridge

[edit]

user@R2# show interfaces ae0

aggregated-ether-options {

lacp {

periodic fast;

system-priority 100;

}

}

unit 0 {

family bridge {


vlan-id-list 100;

}

}

-- Exhibit --

You have configured a LAG and are now enabling LACP on the ae0 interface. You have configured andcommitted the configuration as shown in the exhibit. However, the exhibit also shows that the ae0 interface isnow in the up/down state.

What must you do to resolve this problem?

A. Configure both routers' ae0 LACP configuration to periodic fast.B. Change the LACP system-priority of R1 to 300.C. Configure R1's LACP configuration as active.D. Configure R2's LACP configuration as passive.




Documents

Junos Troubleshooting - GRATIS EXAM · Which three statements are correct about rpd related troubleshooting on devices running the Junos OS? (Choose three.) A. A log for rpd scheduler