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Juniper Junos Troubleshooting Sample Questions:

1. -- 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 master Routing Engine cannot communicate with the backup Routing Engine.
C) The synchronization failed because the Junos OS version on the backup is incompatible with the version running on the master.
D) The synchronization failed because the Junos OS version on the backup does not support GRES.

2. A 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 retransmission interval
B) dead interval
C) hello interval
D) LSA refresh interval

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

4. Which operational command would be used to display diagnostic data and alarms for 1/10/100 Gigabit Ethernet optical transceivers?

A) show interfaces extensive
B) show chassis alarms
C) show interfaces diagnostics optics
D) show interfaces controller

5. Click the Exhibit button.
-- 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 BGP packets.
D) R1 will accept telnet traffic.
E) R1 will drop all non-TCP transit traffic.

Solutions: