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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

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

A) restart chassis-control soft
B) restart chassis-control
C) restart chassis-control immediately
D) restart routing

2. -- Exhibit -
[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. When verifying 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 chassis network-services ethernet
B) set chassis alarm ethernet link-down ignore
C) set interfaces ae0 aggregated-ether-options lacp active
D) set chassis aggregated-devices ethernet device-count 1

3. An OSPF neighbor is stuck in the Exchange state.
Which condition would cause this to happen?

A) a mismatched area
B) mismatched authentication
C) a mismatched IP subnet
D) a mismatched MTU

4. A 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 extensive
B) monitor interface traffic
C) show interfaces terse
D) monitor traffic interface

5. Click the Exhibit button.
-- 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) An AS path loop is detected.
C) The export policy should be applied under the [edit protocols bgp group ibgp neighbor 10.1.2.1] hierarchy.
D) The static route has Next hop typE. Reject.

Solutions: