Which 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.
Which 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.”
Using Virtual Router Redundancy Protocol (VRRP), you want to statically force the priorities of the master and backup routers. Which priority would you set on the master router?
You have configured and successfully committed the configuration for nonstop active routing (NSR). Which command 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.
Referring to the exhibit, which two statements are true? (Choose two.)
[email protected]> show configuration system services | display inheritance
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.
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.)
[email protected]> show snmp statistics
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,
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
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
A. unsupported SNMP community name
B. unknown SNMP community name
C. unsupported SNMP version indicated
D. invalid SNMP version indicated
During the boot of your MX480, you see the output shown in the exhibit.
Which three statements are true? (Choose three.)
=================== Bootstrap installer starting ===================
Initialized the environment
Routing engine model is RE-S-1800×4
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)…
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.
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.)
[email protected]> 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
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.
Which three commands are useful in identifying and addressing the cause of the lack of disk space? (Choose three.)
[email protected]> 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.
A. show chassis routing-engine
B. show system storage
C. show system directory-usage
D. request system software add validate
E. request system storage cleanup
Referring to the exhibit, which three statements are true? (Choose three.)
Slot 0 information:
Total CPU DRAM —- CPU less FPC —-
Start time 2012-07-07 03:21:00 UTC
Uptime 27 minutes, 51 seconds
Slot 1 information:
Reason — Hardware Not In Right Slot —
Slot 2 information:
Total CPU DRAM 32 MB
Start time 2012-07-07 03:20:59 UTC
Uptime 27 minutes, 52 seconds
Slot 3 information:
Reason — Hardware Not Supported —
Total CPU DRAM 0 MB
Slot 6 information:
Total CPU DRAM 32 MB
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.
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