Aggregate global unicast addresses are the ipv6

Info icon This preview shows pages 31–34. Sign up to view the full content.

View Full Document Right Arrow Icon
Aggregate Global Unicast addresses are the IPv6 addresses used for generic IPv6 traffic, as well as for the IPv6 Internet. These are similar to the public addresses used in IPv4. Aggregate Global Unicast addresses for IPv6 are assigned by the Internet Assigned Numbers Authority (IANA) and fall within the IPv6 prefix 2000::/3. This allows for a range of Aggregate Global Unicast addresses from 2000 to 3FFF. The Multicast addresses used in IPv6 are derived from the FF00::/8 IPv6 prefix. In IPv6, Multicast operates in a different manner than that of Multicast in IPv4. IP Multicast is used extensively in IPv6 and replaces IPv4 protocols, such as the Address Resolution Protocol (ARP). 30 Router#config t Router(config)#ipv6 unicast-routing Router(config)#interface fast ethernet 0/0 Router(config-if)#ip address 192.1681.1 255.255.255.0 Router(config-if)#ipv6 address 2eef:c001:b14:2::c12/125 Router(config-if)#exit Router#show ipv6 interface f0/0 FastEthernet0/0 is up, line protocol is down IPv6 is enabled, link-local address is FE80::20E:83FF:FEF5:FD4F [TENTATIVE] Global unicast address(es): 2EEF:C001:B14:2::C12, subnet is 2EEF:C001:B14:2::C10/125 [TENTATIVE]
Image of page 31

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Cisco CCENT Cram Guide v3.0 © Paul Browning 2017 www.in60days.com Anycast can be described simply as one-to-nearest communication, because the nearest common address, based on routing protocol metrics, will always be preferred by the local device. In IPv6 there is no specially allocated range for Anycast, as Anycast addresses use Global Unicast, Site-Local, or even Link-Local addresses. Loopback addresses in IPv6 are used in the same manner as in IPv4. Each device has one IPv6 Loopback address, which is comparable to the 127.0.0.1 Loopback address used in IPv4, and this address is used by the device itself. IPv6 Loopback addresses use the prefix ::1. In IPv6 addressing, unspecified addresses are simply Unicast addresses that are not assigned to any interface. These addresses indicate the absence of an IPv6 address and are used for special purposes that include IPv6 DHCP and DAD. Unspecified addresses are represented by all 0 values in the IPv6 address and can be written using the :: prefix. In the preferred format, these addresses are represented as 0000:0000:0000:0000:0000:0000:0000:0000. Neighbor Discovery Protocol The IPv6 NDP enables the plug-and-play features of IPv6. It is defined in RFC 2461 and is an integral part of IPv6. NDP operates in the Link Layer and is responsible for the discovery of other nodes on the link, determining the Link Layer addresses of other nodes, finding available routers, and maintaining reachability information about the paths to other active neighbor nodes. NDP performs functions for IPv6 similar to the way ARP (which it replaces) and ICMP Router Discovery and Router Redirect Protocols do for IPv4. Neighbor Discovery Protocol defines five types of ICMPv6 packets, which are listed and described below: ICMPv6 Type Message Type Description and IPv6 Usage 133 Used for Router Solicitation (RS) messages 134 Used for Router Advertisement (RA) messages 135 Used for Neighbor Solicitation (NS) messages 136 Used for Neighbor Advertisement (NA) messages 137 Used for Router Redirect messages 31
Image of page 32
Cisco CCENT Cram Guide v3.0
Image of page 33

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 34
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern