hardMultiple Choice
300-410 Practice Question: Runs the following command to troubleshoot an EEM…
A network engineer runs the following command to troubleshoot an EEM issue:
R1# show event manager environment all
No. Variable Name Value 1 _exit_status 1 2 _event_type syslog 3 _syslog_msg %OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.2 on GigabitEthernet0/0 from LOADING to FULL, Loading Done 4 _syslog_severity 5 5 _syslog_facility OSPF 6 _syslog_mnemonic ADJCHG
What does this output indicate?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The environment variables show that a syslog event with mnemonic ADJCHG triggered, and the applet can use these variables in actions.
The output shows the EEM environment variables that are set when an event triggers an applet. These variables contain information about the event, such as the event type, syslog message details, and exit status. This is useful for debugging applets that use these variables in their actions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The environment variables show that a syslog event with mnemonic ADJCHG triggered, and the applet can use these variables in actions.
Why this is correct
The output lists EEM environment variables populated from a matched syslog event, including _syslog_mnemonic ADJCHG and _syslog_severity 5. These built-in variables are passed to the applet, letting its actions reference the triggering OSPF adjacency change without parsing the raw message.
- ✗
The environment variables are configured manually by the engineer to define the applet behavior.
Why it's wrong here
These underscore-prefixed variables are built-in EEM system variables populated automatically from the triggering syslog event, not engineer-defined ones. Manual definition applies to user variables created with the event manager environment command, which is why the naming convention misleads candidates here.
- ✗
The output shows the current state of all EEM applets and their variables.
Why it's wrong here
This output lists EEM environment variables captured for a triggered event, not applet definitions or their states. It is tempting because it is produced by an EEM show command, but applet state requires show event manager policy registered; the variables shown describe the syslog event that fired.
- ✗
The _exit_status variable indicates the applet failed to execute.
Why it's wrong here
An _exit_status of 1 records the applet's completion code, not a failure; Cisco EEM returns 1 when the last action ran successfully. The variable is tempting because non-zero exit codes often signal errors in shell scripting, so engineers read 1 as a fault rather than the EEM success convention.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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