IPV6.txt

## IP v6:

Các v?n d? c?a IP V4:

- Thi?u h?t IP public
- B?ng d?nh tuy?n quá l?n
- B?o m?t 
- Header ph?c t?p
- Không có mô hình d?nh tuy?n end to end

Ip v6: 128 bit address

### IPv6 command

## R1

R1>enable
R1#conf t
R1(config)#ipv6 unicast-routing 
R1(config)#interface gigabitEthernet 0/0
R1(config-if)#ipv6 address 2001:123:1::1/64
R1#show ipv6 interface brief 
GigabitEthernet0/0         [up/up]
    FE80::204:9AFF:FE6E:2A01
    2001:123:1::1
GigabitEthernet0/1         [administratively down/down]
Serial0/0/0                [up/up]
Serial0/0/1                [up/up]
Vlan1                      [administratively down/down]



FE80::204:9AFF:FE6E:2A01: IPv6 link local, chi co tac dung tren tung duong ket noi

R1#ping FE80::260:47FF:FE4B:8B0C
Output Interface: GigabitEthernet0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::260:47FF:FE4B:8B0C, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/1 ms

IP Link Local luon bat dau voi chuoi FE80
Co che tu sinh IP link local o? router cung nhu o? cac thiet bi nhu may tinh: EUI-64 - su dung dia chi MAC de sinh ra IP link local




Vi du: 

- IP link local cua may tinh: FE80::260:47FF:FE4B:8B0C
- IP link local cua router tai port G0/0: FE80::204:9AFF:FE6E:2A01 - MAC cua interface g0/0: Hardware is CN Gigabit Ethernet, address is 0004.9a6e.2a01 


Gan IPv6 Link Local bang tay, thay vi tu sinh ra:

- Co the gan cung 1 IP link local cho nhieu interface cho router ma khong so bi trung lap, do IP link local chi co tac dung tren 1 duong ket noi


# R1

int s0/0
iv6 address fe80::1 link-local
int s0/1
iv6 address fe80::1 link-local
int g0/1
iv6 address fe80::1 link-local


## IpV6 Autoconfig

Tu dong sinh IPV6 dua tren ICMP