Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?
Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?
The command that automatically generates an IPv6 address from a specified IPv6 prefix and the MAC address of an interface is "ipv6 address <prefix> eui-64". This command uses the Extended Unique Identifier (EUI-64) format to convert the 48-bit MAC address into a 64-bit interface identifier, which is then combined with the specified IPv6 prefix to create a 128-bit IPv6 address. This process ensures a unique and consistent addressing scheme based on the given prefix and the device's hardware address.
The needed is an IPv6 address generated from a specified prefix and not from a delegated one, so I think that B is the right answer
The simplest method is to enable stateless autoconfiguration on the interface. Enabling stateless autoconfiguration on the interface configures IPv6 addresses based on prefixes received in Router Advertisement messages. A link-local address, based on the Modified EUI-64 interface ID, is automatically generated for the interface when stateless autoconfiguration is enabled. To enable stateless autoconfiguration, enter the following command: hostname(config-if)# ipv6 address autoconfig
That's as may, but the question states automatically I.E. upon entering the command the address is added without the need for further information to be acquired first.
EUI-64 (Extended Unique Identifier) is a method we can use to automatically configure IPv6 host addresses. An IPv6 device will use the MAC address of its interface to generate a unique 64-bit interface ID. However, a MAC address is 48 bit and the interface ID is 64 bit.
yes , but the EUI64 ADDS FFFE in the middle and flips the 7th bit . That's why the MAC 48bit + 16bit from FFFE (1hex = 4bits) = 64 bits .
CCNA 200-301 Official Cert Guide, Volume 1 Chapter 24: Implementing IPv6 Addressing on Routers ipv6 address address/prefix-length: Static configuration of a specific address ipv6 address prefix/prefix-length eui-64: Static configuration of a specific prefix and prefix length, with the router calculating the interface ID using EUI-64 rules ipv6 address dhcp: Dynamic learning on the address and prefix length using DHCP ipv6 address autoconfig: Dynamic learning of the prefix and prefix length, with the router calculating the interface ID using EUI-64 rules (SLAAC)
I think its B because it says "specified IPv6 prefix"
Answer is B
This question doesn't require you to think outside the given parameters. For instance, it suggests analyzing the question before considering the options. The term "Auto config" is linked to SLAAC, and if the question mentions SLAAC or hints at it, option C is probably the correct answer. In essence, the question is asking how you would generate an IPv6 address using a /64 prefix and the MAC address of the interface.
I test it on a real router
C is correct Keyword is automatically (dynamically), B is static not dynamic.
specified IPv6 prefix
To configure an IPv6 address for an interface and enables IPv6 processing on the interface using an EUI-64 interface ID in the low order 64 bits of the address, use the ipv6 address eui-64 command in interface configuration mode. To remove the address from the interface, use the no form of this command. ipv6 address ipv6-prefix/prefix-length eui-64 https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-i1.html#wp3027933494
C is correct! Contact me for full questions <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="3855594c4c514c514b78574d4c54575753165b5755">[email protected]</a>
Answer is B. The key is "specified prefix". SLAAC aka auto config dynamically learns prefix and specified prefix is with eui 64. Such a straight forward question that people are arguing on.
ipv6 address eui-64 Use ipv6 address eui-64 to configure an EUI-64 IPv6 address for an interface. Use undo ipv6 address eui-64 to remove the EUI-64 IPv6 address of the interface. Syntax ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length } eui-64 undo ipv6 address [ ipv6-address prefix-length | ipv6-address/prefix-length ] eui-64 Default No EUI-64 IPv6 address is configured for an interface.
https://supervisorbullying.com/configuring-ipv6-addresses-using-eui-64/ https://techhub.hpe.com/eginfolib/networking/docs/switches/5920-5900/5998-5322a_l3-ip-svcs_cr/content/414641213.htm <Sysname> system-view [Sysname] interface vlan-interface 100 [Sysname-Vlan-interface100] ipv6 address 2001::1/64 eui-64
B is correct The command that automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface is the 'ipv6 address eui-64' command. This command uses the Extended Unique Identifier (EUI-64) format to convert the 48-bit MAC address to a 64-bit interface identifier, completing the full 128-bit IPv6 address. The output from 'ipv6 address eui-64' will be a unique, non-duplicable address for each interface. For example, if your IPv6 prefix is 2001:DB8::/64 and the MAC address is 00-14-22-01-23-45, the 'ipv6 address eui-64' command would generate the IPv6 address as: 2001:DB8::214:22FF:FE01:2345.
sorry, i think C is correct here.
Answer is B since the question says "a specified IPv6 prefix and MAC address of an interface"
I encountered a similar question in Pearson Test Prep's practice exams in which C was the answer. Please correct me if I'm wrong. It stated: Which command could be configured on R1 to automatically calculate an IPv6 address from a prefix learned from the ISP router? A. ipv6 address autoconfig neighbor B. ipv6 address slaac C. ipv6 address dynamic D. ipv6 address autoconfig Explanation: The ipv6 address autoconfig command is used to have an interface calculate its IPv6 address using Stateless address autoconfiguration (SLAAC). When using SLAAC, the IPv6 host will either receive a Neighbor Discovery Protocol RA or solicit a router to send one using NDP RS. This advertisement is used to learn the IPv6 prefix that is being used on a link. The IPv6 host (in this case R1) can then use this prefix and utilize EUI-64 to form the host-ID to form a complete IPv6 address to use on a link.
the cuestion is which comand.....answer is ipv6 address autonfig
Sorry, I meant *D* was the answer.
Answer is B
B is correct
B is correct