28 cisco ccent cram guide v30 paul browning 2017

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Cisco CCENT Cram Guide v3.0 © Paul Browning 2017 The 128 bits are broken down into eight sets of 16 bits each separated by a colon when written in full format. Every 4 hex bits can range from 0000 to FFFF, with F being the highest digit available in hex numbering: 0000 0000 0000 0000 0000 0000 0000 0000 to to to to to to to to FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF An IPv6 address consists of 128 bits represented in hexadecimal format separated into eight parts e.g. EEDE:AC89:4323:5445:FE32:BB78:7856:2022. There are no broadcast packets, only anycast multicast unicast. The three ways in which IPv6 addresses can be represented are as follows: The preferred or complete address representation or form Compressed representation IPv6 addresses with an embedded IPv4 address The preferred representation for an IPv6 address is the longest format, also referred to as the complete form of an IPv6 address. This format represents all 32 hexadecimal characters that are used to form an IPv6 address. This is performed by writing the address as a series of eight 16-bit hexadecimal fields, separated by a colon (e.g., 3FFF:1234:ABCD:5678:020C:CEFF:FEA7:F3A0). The compressed representation allows for IPv6 addresses to be compressed in one of two ways. The first method allows a double colon (::) to be used to compress consecutive zero values in a valid IPv6 address for successive 16-bit fields comprised of zeros or for leading zeros in the IPv6 address. When using this method, it is important to remember that the double colon can be used only once in an IPv6 address. The second method of IPv6 compressed address representation is applicable to each 16-bit field and allows leading zeros to be omitted from the IPv6 address. When using this method, if every bit in the 16-bit field is set to 0, then one zero must be used to represent this field. In this case, not all of the zero values can be omitted. Complete IPv6 Addresses Using Both Compressed Form Methods Complete IPv6 Address Representation Compressed IPv6 Address Representation 0000:0000:0000:0000:1a2b:000c:f123:4567 ::1a2b:c:f123:4567 FEC0:0004:AB10:00CD:1234:0000:0000:6789 FEC0:4:AB10:CD:1234::6789 3FFF:0c00:0000:1010:1A2B:0000:0000:DE0F 3FFF:c00:0:1010:1A2B::DE0F 2001:0000:0000:1234:0000:5678:af23:00d5 2001::1234:0:5678:af23:d5 Cisco IOS support IPv6 commands in version 12.2(2)T and later. 29
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Cisco CCENT Cram Guide v3.0 © Paul Browning 2017 Configure IPv6: You can also issue show ipv6 interface brief to see a summary of your IPv6 interfaces and addresses. IPv6 Address Types Link-Local addresses Site-Local addresses (depreciated) Aggregate Global Unicast addresses Multicast addresses Anycast addresses Loopback addresses Unspecified addresses IPv6 Link-Local addresses can be used only on the local link (i.e., a shared segment between devices), and are automatically assigned to each interface when IPv6 is enabled on that interface. These addresses are assigned from the Link-Local prefix FE80::/10.
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