Question 31 of 1,958
mediumMultiple ChoiceObjective-mapped
350-401 Practice Question: Given this telemetry configuration on a Cisco…
Given this telemetry configuration on a Cisco IOS-XE device:
telemetry ietf subscription 400 encoding encode-kvgpb filter xpath /interfaces/interface/state stream yang-push update-policy periodic 1000 receiver ip address 10.1.1.1 50000 protocol grpc source-interface Loopback0
What is the effect of the source-interface Loopback0 command?
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
✓
It uses the IP address of Loopback0 as the source for telemetry packets to the receiver.
The source-interface command ensures that all telemetry packets sent to the receiver use the IP address of Loopback0 as the source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It forces the telemetry receiver to listen on Loopback0.
Why it's wrong here
The source-interface affects the source IP of outgoing packets, not the receiver's listening interface.
- ✓
It uses the IP address of Loopback0 as the source for telemetry packets to the receiver.
Why this is correct
This is the standard behavior of source-interface in telemetry configuration.
- ✗
It restricts the telemetry data to only Loopback0 interface counters.
Why it's wrong here
The filter still selects all interfaces; source-interface does not affect the data filter.
- ✗
It changes the update policy to on-change for Loopback0.
Why it's wrong here
The update-policy remains periodic; source-interface has no effect on update timing.
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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An engineer configures gRPC dial-out telemetry on a Cisco IOS-XE device: ``` telemetry ietf subscription 100 receiver ip address 10.1.1.100 port 50051 protocol grpc-tcp source-address 10.1.1.1 encoding encode-kvgpb filter xpath /interfaces/interface/state/counters update-policy periodic 10000 ``` What is the purpose of the 'source-address' command?
medium- A.It specifies the IP address of the telemetry receiver.
- ✓ B.It specifies the source IP address for the telemetry stream.
- C.It enables the device to receive telemetry data from the receiver.
- D.It specifies the IP address of the network management station.
Why B: The 'source-address' command specifies the IP address that the device uses as the source IP when sending telemetry data to the receiver. This ensures that the receiver can identify the device and that the traffic is sourced from a specific interface.
Last reviewed: Jun 18, 2026
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