??” Second, you can use tunneling, which will become more prominent as
the adoption of IPv6 grows. A variety of IPv6 over IPv4 tunneling
methods exist. Some methods require manual con?¬?guration, whereas
others are more automatic.
??” Third, Cisco IOS Software Release 12.3(2)T and later include Network
Address Translation-Protocol Translation (NAT-PT) between IPv6 and
IPv4. This translation allows direct communication between hosts that
use different versions of the IP protocol.
Understanding IPv6 Addresses
Colons separate entries in a series of 16-bit hexadecimal ?¬?elds that represent IPv6
addresses. The hexadecimal digits A, B, C, D, E, and F that are represented in IPv6
addresses are not case sensitive.
IPv6 does not require explicit address string notation. Use the following guidelines for IPv6
address string notations:
?– The leading zeros in a ?¬?eld are optional, so 09C0 equals 9C0 and 0000 equals 0.
?– Successive ?¬?elds of zeros can be represented as :: only once in an address.
?– An unspeci?¬?ed address is written as :: because it contains only zeros.
Using the :: notation greatly reduces the size of most addresses. For example,
FF01:0:0:0:0:0:0:1 becomes FF01::1.
Pages:
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413