What is IPv6 other-config-flag?
Configures the hosts can use stateful autoconfiguration to get non-IPv6-address information.
What flag settings combination is used for stateful DHCPv6?
By default on Cisco routers, the M-flag is set to 0, the O-flag is set to 0 and the A-flag is set to 1. To enable Stateful DHCPv6, we must set the M-flag to 1 using the following command under the interface configuration mode.
Which flags should be set when a host should use stateless DHCPv6 for configuration?
To tell the hosts to use Stateless DHCPv6 for other information, we need to set the O-flag to 1. This is done using the ipv6 nd other-config-flag command.
What is IPv6 nd ra suppress?
Disables the sending of router advertisement messages on an interface.
What does the nd other config flag command do?
Other-Config-Flag tells the end-host to use SLAAC to get IPv6 address and DHCPv6 to get other parameters (DNS server address, for example). Absence of both flags tells the end-host to use only SLAAC.
What is IPv6 ND prefix?
ipv6-prefix: IPv6 address prefix. valid-lifetime: Valid lifetime of a prefix in seconds, in the range of 0 to 4,294,967,295. If this keyword is not provided, the prefix is used for stateless autoconfiguration. off-link: Indicates that the address with the prefix is not directly reachable on the link.
What DHCPv6 message does a host send to the DHCPv6 server if it is using stateful DHCPv6?
Stateful DHCPv6 In this option, the router advertisement message informs the client to get all IPv6 addressing information required from a dedicated DHCPv6 server. This addressing information includes the device’s global unicast address, prefix, prefix length, DNS server address, and default gateway address.
What flag settings combination is used for stateless DHCP?
M = 0, O = 1 : Client gets stateless address from RA. DHCPv6 only assign other configuration settings to client. This combination is known as DHCPv6 stateless.
Which alternative to DHCPv6 dynamically assigns IPv6 addresses to hosts?
In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts? Explanation: Stateless Address Autoconfiguration (SLAAC) can be used as an alternative to DHCPv6.
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 RA and RS in IPv6?
When a dual-protocol host joins a network it sends an ICMPv6 (type 133) Router Solicitation (RS) message to inquire about the local IPv6-capable router on the network. The RA message contains important information for nodes as well as which method they should use to obtain their IPv6 address.
What does the other stateful configuration flag in IPv6 router advertisements mean?
The setting of the “other stateful configuration” flag in IPv6 router advertisements indicates to attached hosts how they can obtain autoconfiguration information other than addresses. If the flag is set, the attached hosts should use stateful autoconfiguration to obtain the other (nonaddress) information.
How do I enable the conformant IPv6 host mode?
To enable the conformant, or strict, IPv6 host mode, use the ipv6 nd host mode strict command in global configuration mode. To reenable conformant, or loose, IPv6 host mode, use the no form of this command.
What is the DHCPv6 interface configuration for a Cisco IP router?
This interface configuration is for a Cisco IOS IPv6 router implementing stateless DHCPv6 with SLAAC enabled: The DHCPv6 Stateful option, also known as managed mode, operates similarly to DHCPv4 in that it assigns unique addresses to each client instead of the client generating the last 64 bits of the address as in SLAAC.
What is the No IPv6 mode host unicast command?
no ipv6 mode host unicast This command has no arguments or keywords Interface configuration (config-if) Release Modification Prior to Cisco IOS 15.4 (2)S This command was introduced. Cisco IOS 15.4 (2)S This command was deprecated. Ensure that the routing services on interfaces that forward IPv6 traffic is enabled.