301B practice questions 121–130

1. Question 121 · 197 in bank

   While investigating the cause of a device failover, an LTM Specialist discovers the following events in /var/log/ltm: 01010029:5: Clock advanced by 518 ticks 01010029:5: Clock advanced by 505 ticks 01010029:5: Clock advanced by 590 ticks 01010029:5: Clock advanced by 568 ticks 01010029:5: Clock advanced by 1681 ticks 01010029:5: Clock advanced by 6584 ticks 01140029:5: HA daemon_heartbeat tmm fails action is failover and restart. 010c0026:5: Failover condition, active attempting to go standby. Which issue caused the failover?

   • ANTP being out of sync
   • BTMM being descheduled
   • CVLAN Fail-safe heartbeats
   • DHA missing heartbeat packets

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   Answer: B

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2. Question 122 · 197 in bank

   A failover event is recorded in the log messages: Jan 01 00:00:50 BIG-IP notice sod[5855]: 01140029:5: HA proc_running tmm fails action is go offline and down links. Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c0050:5: Sod requests links down. Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c0054:5: Offline for traffic group /Common/traffic-group-1. Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c003e:5: Offline Jan 01 00:00:50 BIG-IP notice logger: /usr/bin/tmipsecd --tmmcount 4 ==> /usr/bin/bigstart stop racoon Jan 01 00:00:50 BIG-IP info lacpd[5502]: 01160016:6: Failover event detected. (Switchboard failsafe disabled while offline) Jan 01 00:00:51 BIG-IP err bcm56xxd[5296]: 012c0010:3: Failover event detected. Marking external interfaces down. bsx.c(3633) Jan 01 00:00:51 BIG-IP info bcm56xxd[5296]: 012c0015:6: Link: 1.1 is DOWN Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 0107143c:5: Connection to CMI peer 10.0.0.3 has been removed Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 0107143a:5: CMI reconnect timer: enabled Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 01071431:5: Attempting to connect to CMI peer 10.0.0.3 port 6699 What is the cause of the failover?

   • ATMM failed, and VLAN fail-safe initiated the failover.
   • BTMM failed, and system fail-safe initiated the failover.
   • CLoss of connection to CMI peer 10.0.0.3 initiated the failover.
   • DA switchboard failure caused system fail-safe to initiate the failover.

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   Answer: B

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3. Question 123 · 197 in bank

   An LTM Specialist has just manually failed the active LTM device over to the standby LTM device. The LTM Specialist notices the newly active LTM device is NOT currently receiving traffic. The LTM Specialist verifies the newly active device is responding to ARP but still no traffic is hitting the virtual servers. The LTM Specialist also notices that the virtual servers eventually start responding. What should be added to the configuration to resolve the problem?

   • Avlan failsafe
   • Bfloating self IP
   • Cnetwork failover
   • DMAC masquerading
   • Econnection mirroring

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   Answer: D

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4. Question 124 · 197 in bank

   Select 2

   An LTM Specialist is troubleshooting an issue where one LTM device in a three LTM device group is failing to synchronize after a synchronize to group command is issued. The LTM Specialist verifies there are no packet filters, port lock down, or network issues preventing the connection. What are two reasons the synchronization group is having issues? (Choose two.)

   • ACertificates expired on all of the peer LTM devices.
   • BCertificates stored for the device trusts on all of the peer LTM devices are corrupted.
   • CAdmin passwords changed on one of the peer LTM devices that are able to synchronize.
   • DAdmin password changed on the LTM device NOT receiving the synchronized configurations.
   • ECertificates stored for the device trusts on the LTM device NOT receiving the configuration are corrupted.

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   Answer: DE

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5. Question 125 · 197 in bank

   Select 2

   An LTM Specialist configures two LTM devices in a high-availability pair with trusts established and device groups configured properly using network failover. After several months, the LTM Specialist notices that changes made to one LTM device do NOT cause the synchronization status to update to "changes pending," and this device does NOT synchronize with the device group. Which two steps should the LTM Specialist take to identify the issue? (Choose two.)

   • AVerify that NTP is synchronized.
   • BVerify the network connectivity between the devices.
   • CVerify that the devices are not using self-signed certificates.
   • DVerify that ConfigSync is using the management IP address.
   • EVerify that port lockdown on the ConfigSync interface is set to allow port 1026.

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   Answer: AB

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6. Question 126 · 197 in bank

   Select 2

   An HA pair of LTM devices configured in Active-Standby mode stops responding to traffic and causes an outage. The Active device becomes Standby, but the partner device stays in Standby mode instead of taking over as Active. A reboot and restart of the services brings the LTM device to Active mode for a short time, but then it goes into Standby mode again. Which two configuration components caused this condition? (Choose two.)

   • AVLAN Fail-safe
   • BSystem Fail-safe
   • CGateway Fail-safe
   • DSwitch Board Failure
   • ELink down on Failover

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   Answer: AC

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7. Question 127 · 197 in bank

   A device group is made up of four members: LTM-A, LTM-B, LTM-C, and LTM-D. An LTM Specialist makes a configuration change on LTM-B. Later, a different LTM Specialist notices a "changes pending" message on all devices. When logged into LTM-D, the LTM Specialist attempts to config-sync to the device group. The sync operation fails. Why is the LTM Specialist on LTM-D unable to synchronize the configuration to the group?

   • AThe changes made on LTM-B are invalid.
   • BLTM-D has the lowest commit-id of the group.
   • CNTP is NOT configured on the devices in the group.
   • DLTM-B is the device eligible to initiate a config-sync.

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   Answer: D

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8. Question 128 · 197 in bank

   A failover event is recorded in the following log messages: Jan 01 00:56:56 BIG-IP notice mcpd[5318]: 01070727:5: Pool /Common/my-pool member /Common/10.0.0.10:80 monitor status down. Jan 01 00:56:56 BIG-IP notice sod[5855]: 010c0045:5: Leaving active, group score 10 peer group score 20. Jan 01 00:56:56 BIG-IP notice sod[5855]: 010c0052:5: Standby for traffic group /Common/traffic-group-1. Jan 01 00:56:56 BIG-IP notice sod[5855]: 010c0018:5: Standby Jan 01 00:57:06 BIG-IP notice logger: /usr/bin/tmipsecd --tmmcount 4 ==> /usr/bin/bigstart stop racoon What is the cause of the failover?

   • AThe HA group score changed.
   • BNo traffic is seen on traffic-group-1.
   • CThe peer device left the traffic group.
   • DThe racoon service stopped responding.

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   Answer: A

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9. Question 129 · 197 in bank

   An LTM device pair is configured for failover and connection mirroring. The LTM devices are configured with virtual servers for HTTP, HTTPS with SSL offload, and SSH. An event occurs that causes a failover. HTTP and SSH sessions active at the time of failover remain active, but HTTPS sessions are dropped. What is the root cause of this problem?

   • AThe SSL certificates on the LTM devices do NOT match.
   • BConnection mirroring is incompatible with clientssl profiles.
   • CSNAT automap was NOT enabled for the HTTPS virtual servers.
   • DConnection mirroring was NOT enabled for the HTTPS virtual servers.

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   Answer: B

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10. Question 130 · 197 in bank

    Select 2

    -- Exhibit

    

    -- Exhibit -- Refer to the exhibit. An LTM Specialist is reviewing the virtual server configuration on an LTM device. Which two actions should the LTM Specialist perform to minimize the virtual server configuration? (Choose two.)

    • ARemove 'snat automap' from the virtual server.
    • BRemove the 'http' profile from the virtual server.
    • CRemove the 'default_class' from the virtual server.
    • DCombine 'acct_class' and 'marketing_class' into one class and update associations on the virtual server.
    • ECombine 'marketing_class' and 'default_class' into one class and update associations on the virtual server.

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    Answer: CD

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301B practice, question 121. 197 questions available.