IPv6 Routing with IS-IS Configuration Guide

Enabling IPv6 Routing with IS-IS

Prev Question Next Question

Question

You are deploying IS-IS in your network to enable the routing of only IPv6. Assume that the loopback interface has been properly configured.

What is the minimum required configuration to enable only IPv6 routing in IS-IS?

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D. E.

C

The correct answer is D. user@host# show protocols isis no-ipv4-routing; interface ge-0/0/0.0; interface lo0.0 { passive; } user@host# show interfaces ge-0/0/0 unit 0 { family iso; family inet6; }

IS-IS is a link-state routing protocol used in IP networks, including both IPv4 and IPv6. To enable only IPv6 routing in IS-IS, we need to configure the IS-IS protocol to stop advertising IPv4 prefixes, which can be achieved by setting the 'no-ipv4-routing' configuration option. Additionally, we need to configure the loopback interface with an IPv6 address, and enable the IPv6 address family on the physical interface.

Option A is incorrect because it only enables the IPv6 address family on the physical interface and does not disable IPv4 routing. Option B is incorrect because it enables the ISO address family on the physical interface, but we only need the IPv6 address family. Option C is incorrect because it enables the ISO address family and does not enable the IPv6 address family on the physical interface. Option E is incorrect because it adds a traffic engineering configuration that is not necessary for enabling only IPv6 routing in IS-IS.

Therefore, the minimum required configuration to enable only IPv6 routing in IS-IS is:

  • Set the 'no-ipv4-routing' configuration option in the IS-IS protocol configuration.
  • Configure the loopback interface with an IPv6 address.
  • Enable the IPv6 address family on the physical interface.