IPv6

Question 1

global unicast address

Answer 1

globally unique and routable on internet, always starts with 200::1 /3 or 001 in binary. also always starts with a 2 or 3 in hex

Question 2

what does SLA stand for in IPv6

Answer 2

site-level aggregator, it is analogous to a subnet and can also be called the Subnet ID

Question 3

local unicast address

Answer 3

analogous to private addres in IPv4, always starts with FC00:: /7 followed by the subnet prefix

Question 4

link-local address

Answer 4

automatically configured on an IPv6 interface, prefix of FE80:: /10 or 1111 1110 10 in binary, used in neighbor discovery processes and stateless autoconfiguration

Question 5

What is an IPv4 compatible IPv6 address?

Answer 5

This is an IPv6 unicast address that has zeros in the high-order 96 bits of the address and an IPv4 address in the low-order 32 bits of the address. The format of an IPv4-compatible IPv6 address is 0:0:0:0:0:0:A.B.C.D or ::A.B.C.D.

Question 6

IPv6 multicast address prefix

Answer 6

first octet is FF00::/8 1111 1111 second octet defines lifetime and scope

Question 7

anycast address

Answer 7

created by assigning the same unicast address to multiple interfaces, the node must be configured to recognize it as an anycast address. Hosts cannot use anycast addresses and anycast addresses cannot be used as the source address for a packet.

Question 8

EUI-64 Host ID

Answer 8

pads the 48 bit mac address of the device by inserting FFFE into the middle 16 bits and uses that as the host portion of the IPv6 address. Commonly used for phones gateways and routers

Question 9

Stateless Autoconfiguration

Answer 9

node automatically configures its address by appending its 64 bit interface identifier to the 64 bit network prefix. This enables plug and play for devices on networks with IPv6 routers

Question 10

Stateful Autoconfiguration

Answer 10

uses a DHCPv6 Server, enables record keeping for which hosts have which address unlike stateless autoconfiguration

Question 11

default muticast groups for IPv6 interface

Answer 11

• Solicited-node multicast group FF02:0:0:0:0:1:FF00::/104 (for each unicast and anycast address that is assigned to the interface) - All-nodes link-local multicast group FF02::1 - All-routers link-local multicast group FF02::2

Question 12

What is neighbor discovery used for in IPv6?

Answer 12

• Determining the data link layer address of a neighbor on the same link, like ARP does in IPv4 - Finding neighbor routers - Keeping track of neighbors

Question 13

What is the command to configure stateless autoconfiguration on the router?

Answer 13

ipv6 address autoconfig [default] enter on a per interface basis. If the default keyword is added the router will advertise itself as the default gateway.

Question 14

IPv6 routing protocols

Answer 14

RIPng (next generation) OSPFv3 EIGRP for IPv6 MP-BGP4

Question 15

Steps to enable IPv6 routing

Answer 15

first enter command ipv6 unicast routing to enable the router forward ipv6 unicast packets, then enable ipv6 on each necessary interface with the ipv6 enable command

Question 16

How to configure a static route in IPv6

Answer 16

ipv6 route *ipv6-network/ipv6-mask *outgoing_interface [ipv6-next-hop]

Question 17

OSPFv3 multicast address

Answer 17

FF02::5 for OSPF routers FF02::6 for OSPF designated routers

Question 18

main differences in OSPFv3

Answer 18

support for IPv6 In version 3, you assign the router ID, area ID, and link-state ID, which are all still 32-bit values but are no longer found using the IP address because an IPv6 address is 128 bits

Question 19

Router(config)#ipv6 router ospf process-id:

Answer 19

Enables the OSPF routing process for IPv6. The process-id identifies the specific routing process and does not need to be the same on all routers in the OSPF routing domain.

Question 20

Router(config-rtr)#router-id router-id:

Answer 20

The router uses the 32-bit value to select the router ID for OSPFv3 represented in dotted decimal notation.

Question 21

Router(config-if)#ipv6 ospf process-id area area-id:

Answer 21

Enables the OSPFv3 routing process on an interface. The process-id identifies the specific routing process and must be the same as the process-id used to create the routing process in the ipv6 router ospf process-id command. The area-id is the area that must be associated with the OSPFv3 interface.

Question 22

Router(config-rtr)#default-information originate:

Answer 22

Generates a default external route into the OSPFv3 routing domain.

Question 23

When an IPv6 router sends a router advertisement, what is the destination multicast address?

Answer 23

FF02::1

Question 24

unique local address

Answer 24

These are addresses similar to RFC 1918, “Address Allocation for Private Internets,” in IPv4 today In hexadecimal, site-local addresses begin with FE and then C to F for the third hexadecimal digit. So, these addresses begin with FEC, FED, FEE, or FEF.

Question 25

link-local addresses

Answer 25

he concept of link-local scope is new to IPv6. These addresses have a smaller scope than site-local addresses; they refer only to a particular physical link (physical network). Routers do not forward datagrams using link-local addresses, not even within the organization; A link-local address typically begins with FE80::/10.

Question 26

reserved addresses

Answer 26

The lowest address within each subnet prefix (the interface identifier set to all zeroes) is reserved as the “subnet-router” anycast address. The 128 highest addresses within each /64 subnet prefix are reserved to be used as anycast addresses.

Question 27

IPv6 loopback address

Answer 27

::1

Question 28

Unspecified Addresses

Answer 28

It is typically used in the source field of a datagram that is sent by a device that seeks to have its IP address configured.

Question 29

Diagram of how EUI-64 address is created

Answer 29

Question 30

how to view IPv6 nieghbors(mac table) table on PC

Answer 30

netsh interface ipv6 show neighbor