IP Version 6

 IPv6 address is 128 bits long includes a 64-bit interface identifier and 48-bit prefix and 16-bit subnetting. How many subnets? 2 to the 16th power is 65,536 subnets. 


Zero compression: If you have consecutive fields of zeros, they can be expressed with two colons. 

1234:1234:0000:0000:0000:0000:32456:3434

1234:1234::3456:3434

Leading zero compression: Leave at least one number in each field, even if the field is all zeros. 

1234:0000:1234:0000:1234:0000:1234:01234

1234:0:1234:0:1234:0:1234:123


R2#(config)#ipv6 unicast-routing

R2(config)#int gig 0/0

R2(config-if)#ipv6 address 2001:1111:2222:1:2/64

R2#show ipv6 int gig 0/0


Static Routing: 

Three types of static routes:

  • Recursive, where only the next-hope address is specified.
  • Directly Connected, where only the output interface is specified.
  • Fully Specified, where both the next-hop address and output interfaces are specified. 


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