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49 Cards in this Set
- Front
- Back
What are some of the changes to IPv6 from IPv4? |
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IPv6 Changes: Address Assignment Features |
There are new ways to assign IPv6 address to network devices. DHCP has been upgraded but there is also something new called stateless Autoconfiguration. |
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IPv6 Changes: Address Renumbering |
Renumbering an IPv4 network is not so much fun. Renumbering an IPv6 network is easier because there's a method to change your IPv6 prefix rather easily |
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IPv6 Changes: Mobility Support |
IPv6 has features so a mobile device can move around the network and keep the same IPv6 address wherever you are |
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IPv6 Changes: No need for NAT/PAT |
We have so much address space that we don't need any translation of network addresses or ports anymore |
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IPv6 Changes: IPSec |
IPSec is built into the protocol |
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IPv6 Changes: Headers |
IPv6 has smaller headers |
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IPv6 Changes: Broadcast Traffic |
IPv6 doesn't use any layer 3 broadcasts anymore |
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IPv6 Changes: Migration tools |
IPV4 and IPv6 are not compatible with each other so we need tools to make the migration nice and easy |
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IPv6 has ________ bit address |
128 bit address |
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IPv4 has _________ bit address |
32 bit address |
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Every additional bit does what to the addresses? |
Every additional bit doubles the number of IP adresses |
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What kind of traffic does IPv6 have? |
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What is unicast? |
Same as with IPv4. You can have multiple IPv6 addresses on an interface. |
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What is multicast? |
We use multicast even more for IPv6 since we don't have broadcast traffic anymore |
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What is anycast? |
You can have the same IPv6 address on multiple hosts and your routers will make sure you are routed to the closest destination
NOTE: You could use this for load balancing |
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IPv4 has public and private IP addresses and IPv6 has something similar but different. What are they? |
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What is unique local |
This is the equivalent of IPv4 address. you should use these on your own network and not on the internet. |
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What is the prefix for unique local? |
FD00::/8 |
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Each IPv6 device will have _______________ address. |
Link Local Address |
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Link-Local Scope
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This is when packets sent between link-local addresses and will remain on the link and will not be forwarded by routers to other subnets.
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What is the prefix for Link Local? |
FE80::/10 |
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What are global unicast addresses used for? |
These are used on the internet.
NOTE: Most devices will use this |
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What is the prefix for global unicast?
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2000:/3
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What is a site local address? |
This was to be used for internal networks but has been depreciated.
NOTE: This is not going to be used |
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What is the prefix for site local? |
FECO::/10 |
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What is an "unspecified" IPv6 address? |
This will show up as ::/128 and is used when your host has no usable IPv6 addresses. |
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What is a "Loopback" Ipv6 address? |
The same as IPv4 127.0.0.1 but for IPv6 we use ::1/128 |
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What is the prefix for multicast? |
FF::/8 |
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What are the multicast addresses for OSPF? |
224.0.0.5 or FF02::5 224.0.0.6 or FF02::6 |
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What is the multicast address for EIGRP? |
224.0.0.10 or FFO2::A |
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What is the multicast address for RIP? |
224.0.0.9 or FF09::9 |
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What are the two options when we configure IPv6? |
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When configuring IPv6 what is a good rule of thumb?
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Most of the commands are the same for IPV6, you just need to type IPv6 instead of ip.
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What is EUI-64? |
User can manually configure IPv6 address
Explanation: Extended Unique Identifier (EUI), as per RFC2373, allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64). |
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What two parts does the IPv6 address consist of?
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The prefix (equivalent to IPv4)
Interface ID (which uniquely identify the host) |
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How do you create an interface ID? |
Split the mac address in half and put FF:FE in the middle. |
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What is Stateless autoconfiguration? |
This is another method to give network devices an IPv6 address automatically
NOTE: sometimes referred to as mini DHCP |
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What is NDP? |
Neighbor Discovery Protocol
It operates in the link layer of the Internet model (RFC 1122)
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NDP offers two main things, what are they?
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RS (Route Solicitation)
RA (Router Advertisement) NOTE: These help an IPv6 device to automatically configure an IPv6 address |
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IPv6 unicats-routing command |
This command is required to finish the IPv6 configuration in order to have your router route. |
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What command allows your router to generate its own IPv6 address? |
ipv6 address autoconfig |
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How do you debug neighbor discovery in IPv6?
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debug ipv6 nd
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What command allows you to see the cached router advertisements? |
show ipv6 routers |
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What is DHCP called for IPv6?
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DHCPv6
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How does DHCPv6 work?
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Since we don't use broadcasts anymore, IPv6 device will send multicast packets to FF02::1:2 Routers will forward these packets to DHCP servers
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What replaces arp? |
neighbor discovery |
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What command allows you to see the mapping between IPv6 and and mac addresses? |
show ipv6 neighbors |
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What is DAD? |
Duplicate Address Detection
IPv6 will send a neighbor solicitation to the solicited node multicast address but based on its own IPv6 address. |