It's time to find out how to use the router advertisement guard. Discover how to block unwanted router advertisement messages in this video.
- [Instructor] We're now into a section … of the Cisco blueprint found … under the infrastructure security section, … where we're told that we need to be able to describe … several IP version six first hop security features. … You don't need to know how to configure these features … for the exam. … You just need to recognize what each feature is used for. … And we'll start that discussion here … with IP version six Router Advertisement Guard, … or RA Guard. … In IP version six networks, … devices will periodically … send out RA messages via multicast. … These RA messages help network nodes determine information … about the local area network, … such as the default gateway, … the default routers list, … the network prefix list, … and other information. … The RA Guard feature allows us to block … or reject unwanted RA messages that might arrive. … We would configure this in layer two … or layer three switch where hosts or routers are attached … in order to restrict incoming router type NDP messages, …
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