Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
Anycast |
Anycast communication allows the same address to be placed on more than one device so that when traffic is sent to the device service addressed in this way, it's routed to the nearest host that shares the same address. |
|
|
IPv6 Address Example 2001:0db8:3c4d:0012:0000:0000:1234:56ab |
(48 bits) Global Prefix: 2001:0db8:3c4d:
(16 bits) Subnet: 0012
(64 bits) Interface ID: 0000:0000:1234:56ab
Total: 128 bits |
|
|
Shortened Expression |
Drop any leading zeros in each of the individual blocks.
Remove consecutive blocks of zeros by replacing them with a double colon. |
|
|
IPv6 Unicast |
Delivered to a single interface |
|
|
Global Unicast Address |
2000::/3 Publicly routed addresses (same as IPv4). |
|
|
Link-local addresses |
FE80::/10 Automatic private IP address (APIPA) Not routed Start with FE80::/10 |
|
|
Unique Local Address |
FC00::/7 Intended for non-routing Design to replace site-local addresses |
|
|
Multicast |
Always start with FF FF00::/8 Packets delivered to all interfaces tuned into the multicast address. One-to-many |
|
|
Anycast |
Identifies multiple interfaces on multiple devices. Any cast packet is delivered to only one device. the closest one it finds defined in terms of routing distance
One-to-nearest
Only configured on routers, never hosts.
Source addresses could never be an anycast address. |
|
|
IPv6 Unicast-routinf |
Enables IPv6 on a router |
|
|
EUI-64 |
Extended Unique Identifier
Allows device to use its MAC address and pad (FFFE) to make the interface ID |
|
|
Stateless Autoconfiguration (eui-64) |
Allows devices on a network to address themselves with a link local unicast address as well as with a global unicast address.
MAC address = 48 bits Remaining 16 bits is FFFE
0260:d6FF:FE73:1987 |
|
|
Invert 7th bit |
MAC address: 0090:2716:fd0f IPv6 EUI-64 address: 2001:0db8:0:1:0290:27:ff:fe16:fd0f |
|
|
Invert 7th bit |
MAC address: 0090:2716:fd0f IPv6 EUI-64 address: 2001:0db8:0:1:0290:27:ff:fe16:fd0f
00000000 = 0 00000010 = 2 (seventh bit inverted) |
|
|
Two-step IPv6 autoconfiguration |
1. Host sends a router solicitation (RS) to gather prefix information. RS is multicast FF02::2 (ICMP Type 133)
2. Router answers back with prefix information via router advertisement (RA). Also multicast FF02::01 (ICMP Type 134). RA sent on a periodic basis. |
|
|
How to configure IPv6 autoconfiguration? |
R1(config-if)#ipv6 address autoconfig default |
|
|
True or False: both stateless and stateful autoconfiguration can dynamically assign IPv6 addresses |
True |
|
|
How many fields in IPv6 header and how large? |
8 and 40 bytes
Version Traffic class Flow label Payload length Next Header Hop Limit Source address Destination address |
|
|
True or False: unlike IPv4 headers, IPv6 headers have a fixed length. |
True.
IPv6 headers use an extension header instead of the IPv4 fragmentation field and eliminate the IPv4 checksum field. |
|
|
Neighbor Advertisement (NA) and Neighbor Solicitation (NS) |
Gather and provide information about hosts or neighbors. Unlike RS and RA which provide info about routers. |
|
|
IPv6 Routing Protocols |
IPv6 RIPng (next generation) EIGRPv6 OSPFv3 MP-BGP4 |
|
|
3 tools for static routing in ipv6 |
1. Accurate up-to-date network map of your entire Internetwork.
2. Next-hop address and exit interface for each neighbor connection.
3. All remote subnet IDs. |
|
|
'C' and 'L' and 'S' in IPv6 Routing table |
C = connected L = link-local automatically assigned. (Notice FFFE in middle) S = static route |
|
|
IPv6 default route |
::/0 |
|
|
Difference between link-local and unique local addresses |
Unique local can be routed within your organization or company |
