Juniper Junos Troubleshooting - JN0-690

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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

Question 1

You suspect that your router is missing the .0/24 routes for your local network. You first want to look for the routes on the control plane before troubleshooting the data plane.
Which operational mode command should you issue?

A. show arp
B. show route
C. show route forwarding-table
D. show route flow validation table

Question 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 refresh interval
B. hello interval
C. LSA retransmission interval
D. dead interval

Question 3

Click the Exhibit button.

You recently added an EBGP neighbor to R1 and you are receiving a single BGP route for their internal network. You notice that on R2 the route learned from C1 is being marked as hidden because the next hop is unusable.
Referring to the exhibit, what should you do to resolve the problem?

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

Question 4

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

Question 5

-- Exhibit -[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] user@R1# run show interfaces ge-1/1/3 terse Interface Admin Link Proto Local Remote ge-1/1/3 up up ge-1/1/3.0 up up aenet --> ae0.0
[edit]
user@R1# run show interfaces ae0 terse
Interface Admin Link Proto Local Remote
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 {
interface-mode trunk;
vlan-id-list 100;
}
}
**************************************************************************
[edit]
user@R2# 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]
user@R2# run show interfaces ge-1/1/3 terse
Interface Admin Link Proto Local Remote
ge-1/1/3 up up
ge-1/1/3.0 up up aenet --> ae0.0
[edit]
user@R2# run show interfaces ae0 terse
Interface Admin Link Proto Local Remote
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 {
interface-mode trunk;
vlan-id-list 100;
}
}
-- Exhibit --
You have configured a LAG and are now enabling LACP on the ae0 interface. You have configured and committed the configuration as shown in the exhibit. However, the exhibit also shows that the ae0 interface is now in the up/down state.
What must you do to resolve this problem?

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

Solutions: