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Juniper Junos Troubleshooting Sample Questions:

1. Click the Exhibit button.
-- Exhibit -
May 20 22:27:04.010297 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0) May 20 22:27:04.010320 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:04.010342 checksum 0x166d, authtype 0 May 20 22:27:04.010365 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:04.010387 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:07.891698 OSPF periodic xmit from 192.168.0.1 to 224.0.0.5 (IFL 2684276180 area
0.0.0.0)
May 20 22:27:12.749988 OSPF packet ignored: area mismatch (0.0.0.1) from 192.168.0.2 on intf ge-1/1/2.0 area 0.0.0.0 May 20 22:27:12.750071 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area
0.0.0.0) May 20 22:27:12.750095 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:12.750116 checksum 0x166d, authtype 0 May 20 22:27:12.750139 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:12.750161 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:14.393182 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area
0.0.0.0) May 20 22:27:14.393262 Version 2, length 44, ID 10.10.10.1, area 0.0.0.0 May 20 22:27:14.393284 checksum 0x0, authtype 0 May 20 22:27:14.393307 mask 255.255.255.252, hello_ivl 50, opts 0x12, prio 128 May 20 22:27:14.393368 dead_ivl 200, DR 0.0.0.0, BDR 0.0.0.0 May 20 22:27:14.393399 OSPF packet ignored: our router ID received from 192.168.0.2 on intf
ge-1/1/2.0 area 0.0.0.0 -- Exhibit -
Referring to the exhibit, which two OSPF adjacency problems are present? (Choose two.)

A) area type mismatch
B) hello interval mismatch
C) duplicate router ID
D) area number mismatch

2. Which three statements are correct about ARP related troubleshooting? (Choose three.)

A) An individual ARP entry can be cleared using the clear arp hostname command.
B) There are no default ARP policers on any devices running the Junos OS.
C) Most devices that run the Junos OS allow you to specify a manual ARP entry.
D) The clear arp command also clears the IPv6 neighbor cache.
E) The monitor traffic interface <interface-name> command can be used to watch ARP packets.

3. 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) hello interval
C) LSA refresh interval
D) dead interval

4. 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

5. Click the Exhibit button.
-- Exhibit -user@host > show chassis craft-interface
Front Panel System LEDs: Routing Engine 0 1
OK * . Fail . * Master * .
Front Panel Alarm Indicators:
Red LED .
Yellow LED *
Major relay .
Minor relay *
Front Panel FPC LEDs:
FPC 0 1 2 3 4 5 6 7 8 9
Red . . . . . . . . . . Green * * . . . . . . * * CB LEDs:
CB 0 1
Amber . . Green * *
PS LEDs: PS 0 1 2 3 4 5 6 7 8
Red . . . . . . . . . Green . . . . * * * * *
Fan Tray LEDs: FT 0 1 2 3
Red . . . . Green * * * *
Front Panel SFB LEDs: SFB 0 1 2 3 4 5 6 7
Red . . . . . . . . Green * * * * * * * *
Front Panel Chassis Info: Chassis Number 0x0 Chassis Role S
-- Exhibit -
Referring to the exhibit, which statement is true?

A) Routing Engine 1 is OK, the red LED is lit, and the major alarm relay is on.
B) Routing Engine 1 has failed, yellow LED is lit, and the major alarm relay is on.
C) Routing Engine 1 is OK, the red LED is lit, and the minor alarm relay is on.
D) Routing Engine 1 has failed, yellow LED is lit, and the minor alarm relay is on.

Solutions: