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NEW QUESTION # 63
A BIG-IP Administrator observes the following pool member status message:
Pool /Common/testpool member /Common/10.120.0.5:8090 monitor status
down
[/Common/http: up, /Common/http2: down; last error:]
Why is this pool member being marked down? (Choose one answer)
Answer: B
Explanation:
The pool member is marked DOWN because it is monitored by multiple health monitors, specifically an HTTP monitor and an HTTP/2 monitor. The status message clearly shows that the HTTP monitor is UP, while the HTTP/2 monitor is DOWN. In BIG-IP, when multiple monitors are assigned to a pool member, the default behavior is AND logic, meaningall assigned monitors must succeed for the pool member to be considered healthy.
In this scenario, the server is responding successfully to standard HTTP (likely HTTP/1.1) requests but does not support or respond correctly to HTTP/2 requests. As a result, the HTTP/2 monitor fails, which causes the overall monitor status to be DOWN, even though HTTP traffic itself is working.
This behavior is expected and documented in BIG-IP monitoring logic. Unless the monitor rule is explicitly changed to"at least one of", a single failing monitor will mark the pool member down.
Therefore, the correct conclusion is that the pool member isonly serving HTTP traffic, not HTTP/2.
The resolution would be to either remove the HTTP/2 monitor, correct the application to support HTTP/2, or adjust the monitor rule to match the intended health-check logic.
NEW QUESTION # 64
Clients report that they cannot reach the virtual server vs-production on port 80, but are able to ping the virtual server address. The configuration is shown below:
Plaintext
ltm virtual vs-production {
destination 10.99.20.50:http
ip-protocol tcp
mask 255.255.255.255
profiles {
http {}
tcp {}
}
source 192.168.0.0/16
translate-address enabled
translate-port enabled
vlans {
external
}
vlans-enabled
}
What is the cause?
Answer: C
Explanation:
The issue is caused by the Source Address restriction configured on the virtual server.
* Source Filter: The configuration contains the line source 192.168.0.0/16. This acts as an implicit Access Control List (ACL). The virtual server will only accept and process TCP connections if the client's source IP address falls within the 192.168.x.x range.
* Why Ping Works: ICMP (Ping) is handled by the Virtual Address object, not the Virtual Server object. Unless ICMP is specifically disabled on the Virtual Address, it will respond to pings from any subnet, even if the Virtual Server itself is restricted by a source filter or is even disabled.
* Evaluation of Other Options:
* Disabled (Option A): If the VS were disabled, the configuration would typically show disabled or state down, and the symptoms would be similar, but the source filter is a more specific
"misconfiguration" in this context.
* Port 80 (Option C): The configuration destination 10.99.20.50:http explicitly confirms it is listening on port 80.
* Unallowed Subnet: If a client from a different network (e.g., 10.10.1.5) tries to connect, the BIG- IP will silently drop the connection or send a reset because it does not match the defined source criteria.
NEW QUESTION # 65
A BIG-IP Administrator observes the following messages in the /var/log/ltm log:
warning tmm[pid]: 011e0002: sweeper_segment_cb_any: Aggressive mode
/Common/default- eviction-policy activated (0) (global memory)
(345209/690176 pages)
warning tmm[pid]: 011e0003: Aggressive mode sweeper /Common/default-
eviction-policy (0) (global memory) 1 connections killed
warning tmm[pid]: 011e0003: Aggressive mode sweeper /Common/default-
eviction-policy (0) (global memory) 1 connections killed
warning tmm[pid]: 011e0003: Aggressive mode sweeper /Common/default-
eviction-policy (0) (global memory) 1 connections killed
What is happening when the BIG-IP Administrator sees the messages displayed above? (Choose two answers)
Answer: A,C
Explanation:
These log messages indicate that the BIG-IP system's Traffic Management Microkernel (TMM) has enteredaggressive eviction modedue tohigh global memory utilization. When TMM memory consumption reaches critical thresholds, BIG-IP activates thedefault eviction policyto protect system stability and prevent a full traffic processing failure. This condition directly corresponds to Option A, where the global eviction policy is triggered because TMM memory resources are nearing exhaustion.
Once aggressive mode is activated, BIG-IP begins using theconnection sweeper mechanism, which selectively terminates existing connections to free memory. The repeated log entries stating" connections killed"confirm that the system isreaping some connections, not all connections. This behavior matches Option C. The eviction process is incremental and controlled, targeting idle, low- priority, or least-recently-used connections first to minimize impact on active traffic.
NEW QUESTION # 66
Which process is most likely responsible for high traffic processing CPU usage?
Answer: A
Explanation:
TMM handles traffic processing and is usually responsible for high CPU under load.
NEW QUESTION # 67
Which file should the BIG-IP Administrator check to determine when a Virtual Server changed its status from RED to GREEN?
Answer: C
Explanation:
Status changes for local traffic objects (Virtual Servers, Pools, Nodes) are recorded in the Local Traffic Manager (LTM) log.
Health State Logging: When a health monitor marks a resource as available (Green) or unavailable (Red), the system generates a log message in /var/log/ltm.
Log Entry Example: A transition from Red to Green will appear as a message similar to:
01010027:3: Pool /Common/my_pool member /Common/10.0.0.1:80 monitor status up.
NEW QUESTION # 68
......
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