CCIE Practice Test 2025 – Complete Exam Prep Resource

The filter that highlights ICMPv6 type 136 is useful for troubleshooting IPv6 address assignment as it corresponds to Router Advertisement (RA) messages. These messages are essential in the Stateless Address Autoconfiguration (SLAAC) process, which enables devices to automatically configure their IPv6 addresses.

When a device connects to a network, it listens for Router Advertisements from neighboring routers. These advertisements convey important information such as the network prefix and various configuration settings needed for the device to generate its own IPv6 address. By applying this filter in Wireshark, you can observe the Router Advertisements being sent on the network and verify whether the proper configuration is taking place or if there are issues affecting the address assignment process.

The other ICMPv6 message types, while significant in the IPv6 protocol suite, relate to different aspects of the protocol. Type 135 is related to Neighbor Solicitation, which is used to discover other nodes on the link and resolve their link-layer addresses. Type 137 corresponds to the Node Information Query, while type 138 deals with Node Information Response messages. Though useful for broader troubleshooting, these are less directly related to the address assignment problem being investigated.