1.9.a Compare IPv6 Address types - Global Unicast
As IPv6 is easier to subnet, most organizations will take their assigned range and will subnet it using IPv6 prefix / ____ which is similar to the way we currently use /24 for IPv4 subnets
64
Typically, if a home user is using IPv4, your ISP will issue you an IPv6/prefix of /____ which will be assigned by DHCP
64
To find the Subnet, you use the length of the global routing prefix and the commonly used 64-bit interface ID field, the subnet field is typically (enter equation) bits, with P being the length of the global routing prefix.
64 minus P
In IPv4, the prefix for a Point-to-Point link would be /30. For IPv6, what is the prefix as defined in the IPv6 standard
/64
If an organization sticks to the /64 prefix for all subnets (assuming that they are assigned a /48 IPv6 Address, then they would have 2 to the __1__ (add power) and then __2) convert to actual number) possible subnets
1) 16 2) 65,536
You would typically use Stateful DHCP / SLAAC to dynamically configure an IPv6 address for a router's interface for connections such as connections to the internet such as __1__ or a __2__
1) DSL 2) Cable Modem
What are the 2 options Cisco provides to configure stable static IPv6 Addresses
1) Full 128-bit Addresses 2) 64-bit prefix where the router derives the Interface IDs
Similar to Classful IPv4 Subnetting, IPv6 breaks up the IP range into 3 parts: 1) ________ is similar to the IPv4 Network Bits, 2) _____ is similar to the Subnet bits, and 3) _____ is similar to the host bits
1) Global Routing Prefix 2) Subnet 3) Interface ID
Very generally, you can think of the global routing ________ like an IPv4 Class A, B, or C network number from the range of public IPv4 addresses
Prefix
When assigning an IPv6 address and prefix to a Cisco interface, in regards to the prefix, you can use the subnet mask or prefix (ex./64)
Prefix /64
Global Unicast Address are similar to IPv4 Public / Private Address
Public
Global Unicast addresses, which serve as (Public / Private) IPv6 addresses
Public
___________ is an organization that manages the allocation and registration of Internet number resources within a region of the world
Regional Internet Authority (RIR)
Once you enable IPv6 on a router, setting a unicast IPv6 address on an interface causes the router to enable the ________ of IPv6 packets in/out that interface (2 of 4)
Routing
Once you enable IPv6 on a router, setting a unicast IPv6 address on an interface causes the router to define the IPv6 prefix (_______) that exists off that interface (3 of 4)
Subnet
For each subnet ID, the first IPv6 address of the subnet is called _________ . This address is reserved and should not be used as an IPv6 address for any host
Subnet Router Anycast Address
Each company then ________ this IPv6 address block and only uses addresses from within that block. The result: that company uses addresses that are unique across the globe as well.
Subnets
T or F, IPv6 does not use any concept like the classful network concept used by IPv4
True
T or F, If you are going to use IPv6 Address on Cisco Routers, you MUST enable this feature and it will NOT work automatically once you assign IPv6 Addresses
True
T or F, In IPv6 Global Unicast, each organization asks for a block of IPv6 addresses, which no one else can use
True
T or F, Like with IPv4, IPv6 needs to identify each IPv6 subnet with some kind of a subnet identifier, or subnet ID.
True
T or F, The IPv6 standards state that address assigned to individual hosts should use a / 64 prefix
True
T or F, Unlike IPv4, IPv6 has no concept of address classes, so no preset rules determine the prefix length of the global routing prefix
True
T or F, When assigning IPv6 address and prefix lengths to Cisco interfaces, you can use the abbreviated versions of the addresses
True
T or F, When using VLANs, IPv6 uses the same rules where you have 1 subnet for each VLAN and 1 subnet for each Point-to-Point WAN connection
True
IPv6 global _______ addresses rely on an administrative process that assigns each company a unique IPv6 address block. Typically the ISP
Unicast
Once you enable IPv6 on a router, setting a unicast IPv6 address on an interface causes the router to give the interface a ___________ IPv6 Address (1 of 4)
Unicast
The term __________ refers to the fact that each address is used by only one interface
Unicast
The organizational order that IPv6 Global Unicast IPv6 Address are assigned are as follows: 1) ________ issues a large block of address (ex. 2001::/16) to the next step upon demand. 2) _______ will then break up (subnets) that range (ex. 2001:0DB8::/32) to be issued to the next step upon demand. 3) _______ will then break up (subnets) that range (2001:0DB8:1111::/48) even further to be issued to the requesting organization upon demand.
1) IANA 2) RIR 3) ISP
However, when a company applies to an ISP, RIR, or any other organization that can assign a global routing prefix, that assignment includes both the __1__ and __2__ and the length of the prefix typically does not change over time and is basically locked
1) Prefix 2) Prefix Length
T or F, Once you have mapped out where each subnet should go and what VLANs, Router Interfaces, etc, you then go on to assigning IP addresses to hosts. To do this, you can do it statically or Dynamically. What are the two Dynamic ways to assign Unicast IPv6 addresses
1) Stateful DHCP 2) Stateless Address Autoconfiguration (SLAAC)
Unless otherwise assigned by IANA, what are the two currently used Global Unicast IPv6 Ranges issued to RIRs
2000 or 3000 (2000::/16 or 3000::/16)
So for an IPv6 address w/ a Global Routing prefix of 2001:0DB8:1111/24 and a subnet ID of 1, your complete IPv6 Subnet ID would be _____
2001:0DB8:1111:1::/64
If you had an IPv6 address w/ a Global Routing prefix of 2001:0DB8:1111/24 and a subnet ID of 1, what would the next Subnet ID be_____
2001:0DB8:1111:2::/64
An ISP will typically issue to an organization an IPv6 address block with a prefix length /
48
What IPv4 Classes are defining unicast IPv4 Address
Class A, B, C, D, E
Once you enable IPv6 on a router, setting a unicast IPv6 address on an interface causes the router to tell the router to add a _________ IPv6 route for that prefix, to the IPv6 routing table, when that interface is up/up (4 of 4)
Connected
Similar to IPv6, once you assign IPv6 Unicast Addresses to an interface, the router also adds IPv6 _____________ routes to the IPv6 routing table off each interface. The routes are visible as long as the interface is in a working (up/up) state
Connected
T or F, A 64-bit interface ID field does not work well in real networks, and should be avoided for the interface ID field
False
This a standards organization that oversees global IP address allocation
Internet Assigned Numbers Authority (IANA)
Of the 2 options Cisco provides to configure stable static IPv6 Addresses, which option uses the host's MAC address to determine the Interface ID
Modified EUI-64
That Global Unicast reserved block of IPv6 addresses, a set of addresses that only one company can use, is called a global routing _______.
Prefix
If you use the "show interfaces" command on a router configure with IPv6 addresses, you will see any configured IPv4 addresses. IPv6 Addresses (will / will not) be displayed
Will Not
To statically configure the full 128-bit unicast address—either global unicast or unique local, the router needs an ____________ interface subcommand on each interface
ipv6 address
What command would you use to allow a router's interface to use Stateless Address Autoconfiguration
ipv6 address autoconfig
What command would you use to allow a router's interface to use Stateful DHCP
ipv6 address dhcp
Before you can assign IPv6 Address to an interface, you need to turn on IPv6 Routing. To do this, you enter the following command
ipv6 unicast-routing
This show command gives you the details of IPv6 interface settings, much like the show ip interface command does for IPv4
show ipv6 interface
This show command gives you interface IPv6 address info, but not prefix length info, similar to the IPv4 show ip interface brief command
show ipv6 interface brief
What command can you use to see the listed connected IPv6 routes that are connected to an interface
show ipv6 route connected
