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NEW QUESTION # 12
Refer to the exhibit.
During a planned upgrade to a BIG-IP HA pair running Active/Standby, an outage to application traffic is reported shortly after the Active unit is forced to Standby. Reverting the failover resolves the outage. What should the BIG-IP Administrator modify to avoid an outage during the next failover event? (Choose one answer)
Answer: B
Explanation:
In an Active/Standby BIG-IP design, application availability during failover depends on both units having equivalent data-plane connectivity for the networks that carry application traffic. Specifically:
VLANs are bound to specific interfaces (and optionally VLAN tags).
Floating self IPs / traffic groups move to the new Active device during failover.
For traffic to continue flowing after failover, the new Active device must have the same VLANs available on the correct interfaces that connect to the upstream/downstream networks.
What the symptom tells you:
Traffic works when Device A is Active
Traffic fails when Device B becomes Active
Failback immediately restores traffic
This pattern strongly indicates the Standby unit does not have the VLAN connected the same way (wrong physical interface assignment), so when it becomes Active, it owns the floating addresses but cannot actually pass traffic on the correct network segment.
Why Interface mismatch is the best match:
If the Active unit is already working, its interface mapping is correct.
The fix is to make the Standby unit's VLAN/interface assignment match the Active unit.
That corresponds to changing the Standby device interface to 1.1.
Why the Tag options are less likely here (given the choices and the exhibit intent):
Tag issues can also break failover traffic, but the question/options are clearly driving toward the classic HA requirement: consistent VLAN-to-interface mapping on both devices so the data plane remains functional after the traffic group moves.
Conclusion: To avoid an outage on the next failover, the BIG-IP Administrator must ensure the Standby device uses the same interface (1.1) for the relevant VLAN(s) that carry the application traffic, so when it becomes Active it can forward/receive traffic normally.
NEW QUESTION # 13
What command will assist the BIG-IP Administrator in finding the tmm routes when in the TMSH CLI?
Answer: A
Explanation:
In the Traffic Management Shell (TMSH), there is a distinct difference between list and show commands.
* List Command: Used to view theconfigurationof an object (what is stored in the config file). list net route would show you the static routes you have manually configured.
* Show Command: Used to view thestatus, statistics, and real-time stateof an object.
* TMM Routes: Because the routing table (RIB/FIB) is a dynamic entity that includes both static routes and learned routes (such as those from a routing protocol or connected subnets), the show net route command is required to see the active routing table as it exists in the Traffic Management Microkernel (TMM).
Key Command Breakdown:
* show net route: Displays the active TMM routing table, including destination, gateway, and the status of the route.
NEW QUESTION # 14
Refer to the exhibit above.
A BIG-IP pool is configured with Priority Group Activation = Less than 2 available members. The pool members have different priority groups and availability states. Which pool members are receiving traffic? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
This question tests understanding of Priority Group Activation (PGA) and how BIG-IP determines which pool members are eligible to receive traffic.
Key BIG-IP Priority Group Concepts:
Higher priority group numbers = higher priority
BIG-IP will only send traffic to the highest priority group that meets the Priority Group Activation condition Lower priority groups are activated only when the condition is met Only available (green) members count toward the activation threshold Configuration from the Exhibit:
Priority Group Activation: Less than 2 available members
Pool Members and Status:
Pool Member Priority Group Status
serv1 2 Active (available)
serv2 2 Inactive (down)
serv3 1 Active (available)
serv4 1 Active (available)
Step-by-Step Traffic Decision:
BIG-IP first evaluates the highest priority group (Priority Group 2)
Priority Group 2 has:
serv1 → available
serv2 → unavailable
Total available members = 1
Activation rule is Less than 2 available members
Condition is true (1 < 2)
BIG-IP activates the next lower priority group (Priority Group 1)
Traffic is now sent to:
serv1 (Priority Group 2)
serv3 and serv4 (Priority Group 1)
Final Result:
Traffic is distributed to serv1, serv3, and serv4
Why the Other Options Are Incorrect:
A - Ignores activation of the lower priority group
B - serv4 is also active and eligible
C - serv2 is down and cannot receive traffic
Key Data Plane Concept Reinforced:
Priority Group Activation controls when lower-priority pool members are allowed to receive traffic, based strictly on the number of available members in the higher-priority group. In this case, the failure of one high-priority member caused BIG-IP to expand traffic distribution to lower-priority members to maintain availability.
NEW QUESTION # 15
A BIG-IP Administrator wants to add a new Self IP to the BIG-IP device. Which item should be assigned to the new Self IP being configured?
Answer: D
Explanation:
ASelf IPis an IP address on the BIG-IP system that you associate with a specificVLAN.
* VLAN Association:A Self IP cannot exist independently; it must be bound to a VLAN to define which network segment the BIG-IP can communicate with.
* Layer 2 to Layer 3 Mapping:While a VLAN is associated with physical interfaces or trunks (Layer 2), the Self IP provides the Layer 3 identity for the BIG-IP on that VLAN.
* Traffic Processing:Self IPs are used by the BIG-IP for health checking backend servers, acting as a default gateway for servers, and for HA heartbeat communication.
NEW QUESTION # 16
A BIG-IP Administrator has a cluster of devices. What should the administrator do after creating a new Virtual Server on device 1?
Answer: C
Explanation:
F5 BIG-IP uses a ConfigSync mechanism to ensure that all members of a Device Service Cluster (DSC) share the same configuration.
Manual Synchronization: By default, configuration changes made on one device (the "source") do not automatically propagate to other members.
Direction of Sync: Once a Virtual Server is created on device 1, that device's configuration is now "newer" than the rest of the group. The administrator must initiate a synchronization from the modified device (device 1) to the Sync-Failover group.
Consistency: This ensures that if a failover occurs, device 2 (the standby) will have the exact same Virtual Server configuration and can take over traffic immediately without interruption.
NEW QUESTION # 17
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