# 300-135 — Question 425

**Type:** multiple_choice
**Topics:** topic_13

## Question

The implementation group has been using the test bed to do an IPv6 'proof-of-concept1. After several changes to the network addressing and routing schemes, a trouble ticket has been opened indicating that the loopback address on R1 (2026::111:1) is not able to ping the loopback address on DSW2 (2026::102:1).
Use the supported commands to isolate the cause of this fault and answer the following question.
The fault condition is related to which technology?

## Correct Answer

_See scenario._

## Explanation

Since we are unable to ping the IPv6 address, the problem is with IPv6 OSPF Routing.

**Reference:** examtopics_answer_description

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Source: https://hiexam.net/q/cisco/300-135/425  
Practice (tracked): https://hiexam.net/study/300-135/practice