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Juniper Junos Troubleshooting Sample Questions:

1. Click the Exhibit button.
-- 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 version indicated
B) unsupported SNMP community name
C) invalid SNMP version indicated
D) unknown SNMP community name

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

3. Which 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 executed first.
B) If an output firewall filter is configured on the same logical interface as a policer, the firewall filter 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 policer is executed first.

4. 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 routing-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 forwarding-options]
user@router# show
traceoptions {
file rpd_log;
flag general;
}

5. 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?

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

Solutions: