What is IPv6 router advertisement?
What is IPv6 router advertisement?
The RADVD (Router Advertisement Daemon) is used for IPv6 auto-configuration and routing. When enabled, messages are sent by the router periodically and in response to solicitations. A host uses the information to learn the prefixes and parameters for the local network.
What is router advertisement RA?
Enabling or disabling router-advertisement (RA) messages enables you to control the routing configuration for selecting the correct network interface to communicate with its neighbors.
Does DHCPv6 use RA?
Even if you intend to use DHCPv6 instead of SLAAC in your environment, you still need RA messages to function on the local LAN. DHCPv6 does not currently have an option to provide this information to the DHCPv6 client in the same way it is provided with DHCP for IPv4.
Should I enable router advertisement IPv6?
You should not use the IPv6 prefix advertised by the local router for static configuration. You should not statically configure the non-default vFiler units with the same IPv6 addresses that are generated by the autoconfiguration.
What is a limitation of IPv6 RA Guard?
The IPv6 RA Guard feature does not offer protection in environments where IPv6 traffic is tunneled. This feature is supported only in hardware when the ternary content addressable memory (TCAM) is programmed. This feature can be configured on a switch port interface in the ingress direction.
Should I enable IPv6 router advertisement?
What is the RA flag to set on a router advertisement if we want hosts on the link to use DHCPv6 to get IPv6 addresses?
Default behavior: SLAAC The RA messages SHOULD have the O flag set to prompt the end hosts to use DHCPv6 to get DNS server IPv6 address (alternative: RFC 6106, which is not yet widely implemented).
What is DHCPv6 guard?
DHCP—DHCPv6 Guard. This module describes the Dynamic Host Configuration Protocol version 6 (DHCPv6) Guard feature. This feature blocks DHCP reply and advertisement messages that originate from unauthorized DHCP servers and relay agents that forward DHCP packets from servers to clients.
How does IPv6 snooping build its binding table?
IPv6 Snooping learns and secures bindings for stateless autoconfiguration addresses in Layer 2 neighbor tables and analyzes ND messages in order to build a trusted binding table. IPv6 ND messages that do not have valid bindings are dropped. For DHCP, UDP messages sourced from port 546 or 547 are redirected.