The correct answer is the destination command specifying the ERSPAN ID and IP address, because ERSPAN (Encapsulated Remote Switched Port Analyzer) works by encapsulating monitored traffic in a GRE tunnel and forwarding it to a remote IP destination. On a Cisco IOS-XE device, you must first define the session as type erspan-source with the monitor session 1 type erspan-source command, then under that session, the destination erspan-id 1 ip address 192.168.1.100 command tells the switch where to send the encapsulated packets. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to distinguish ERSPAN from local SPAN and RSPAN—a common trap is confusing the destination IP requirement with a simple interface command, or forgetting that the source command is also mandatory but not listed here. Remember the memory tip: ERSPAN sends traffic over IP, so you must “address” the destination with an IP, not just an interface.
300-410 SPAN, RSPAN, and ERSPAN Practice Question
This 300-410 practice question tests your understanding of span, rspan, and erspan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO configuration steps are required to set up an ERSPAN session on a Cisco IOS-XE device? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
monitor session 1 type erspan-source
ERSPAN encapsulates monitored traffic in GRE and sends it to an IP destination. The 'monitor session 1 type erspan-source' command defines the session as an ERSPAN source. The 'destination' command under that session specifies the IP address of the destination. 'source' is also needed but is not listed as an option here; 'shutdown' disables the session, 'no monitor session' removes it, and 'ip route' is for routing, not ERSPAN configuration.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
monitor session 1 type erspan-source
Why this is correct
Creates an ERSPAN source session on the device.
Related concept
Static NAT maps one inside address to one outside address.
✓
destination erspan-id 1 ip address 192.168.1.100
Why this is correct
Specifies the destination IP address for the ERSPAN encapsulated traffic.
Related concept
Static NAT maps one inside address to one outside address.
✗
shutdown
Why it's wrong here
This command disables the session, not required for setup.
✗
no monitor session 1
Why it's wrong here
Removes the session, opposite of configuration.
✗
ip route 192.168.1.0 255.255.255.0 GigabitEthernet0/1
Why it's wrong here
Adds a static route, not directly part of ERSPAN session configuration.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
This command disables the session, not required for setup.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
SPAN, RSPAN, and ERSPAN — This question tests SPAN, RSPAN, and ERSPAN — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: monitor session 1 type erspan-source — ERSPAN encapsulates monitored traffic in GRE and sends it to an IP destination. The 'monitor session 1 type erspan-source' command defines the session as an ERSPAN source. The 'destination' command under that session specifies the IP address of the destination. 'source' is also needed but is not listed as an option here; 'shutdown' disables the session, 'no monitor session' removes it, and 'ip route' is for routing, not ERSPAN configuration.
What should I do if I get this 300-410 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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