Koristićemo veoma jednostavnu topologiju sastavljenu od samo tri rutera. Konfigurisaćemo OSPFv3 na serijskim linkovima i na loopback interfejsima. Evo kako izgleda naša topologija:
Prvo ćemo konfigurisati naše IPv6 adrese:
R1: R1(config)#ipv6 unicast-routing R1(config)#int s0/0 R1(config-if)#ip add 10.1.12.1 255.255.255.0 R1(config-if)#ipv6 add 10:1:1:12::1/64 R1(config-if)#no shut R2: R2(config)#ipv6 unicast-routing R2(config)# int s0/0 R2(config-if)#ip add 10.1.12.2 255.255.255.0 R2(config-if)#ipv6 add 10:1:1:12::2/64 R2(config-if)#no shut R2(config-if)#exit R2(config)#int s0/1 R2(config-if)#ip add 10.1.23.2 255.255.255.0 R2(config-if)#ipv6 add 10:1:1:23::2/64 R2(config-if)#no shut R3: R3(config)#ipv6 unicast-routing R3(config-if)#int s0/1 R3(config-if)#ip add 10.1.23.3 255.255.255.0 R3(config-if)#ipv6 add 10:1:1:23::3/64
Prva stvar koju ćemo uraditi na svakom ruteru je da osposobimo IPv6 rutiranje. Zatim ćemo interfejsima dodijelit IPv4 adresu i konačno IPv6 adresu.
Provjerimo stanje linka na R2:
Serial0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::C001:71FF:FE12:0
Global unicast address(es):
10:1:1:12::2, subnet is 10:1:1:12::/64
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF00:2
FF02::1:FF12:0
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
Hosts use stateless autoconfig for addresses.
Serial0/1 is administratively down, line protocol is down
IPv6 is enabled, link-local address is FE80::C001:71FF:FE12:0 [TEN]
Global unicast address(es):
10:1:1:23::2, subnet is 10:1:1:23::/64 [TEN]
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF00:2
FF02::1:FF12:0
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
Hosts use stateless autoconfig for addresses.
R2#sh ipv int b
Serial0/0 [up/up]
FE80::C001:71FF:FE12:0
10:1:1:12::2
Serial0/1 [up/up]
FE80::C001:71FF:FE12:0
10:1:1:23::2
R2#ping 10:1:1:12::1
Sending 5, 100-byte ICMP Echos to 10:1:1:12::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/2/4 ms
R2#ping 10:1:1:23::3
Sending 5, 100-byte ICMP Echos to 10:1:1:23::3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/3/12 ms
Veza između interfejsa na istom subnetu je uspostavljena.
Sada ćemo kofigurisati loopback interfejse i OSPFv3.
R1: R1(config-if)#int lo0 R1(config-if)#ipv6 add 1:1:1::1/64 R1(config-if)#ipv6 ospf 20 area 0 R1(config-if)#int s0/0 R1(config-if)#ipv6 ospf 20 area 0 R2: R2(config)#int lo0 R2(config-if)#ipv6 add 2:2:2::2/64 R2(config-if)#ipv6 ospf 20 area 0 R2(config-if)#int s0/0 R2(config-if)#ipv6 ospf 20 area 0 R2(config-if)#int s0/1 R2(config-if)#ipv6 ospf 20 area 0 R3: R3(config)#int lo0 R3(config-if)#ipv6 add 3:3:3::3/64 R3(config-if)#ipv6 ospf 20 area 0 R3(config-if)#int s0/1 R3(config-if)#ipv6 ospf 20 area 0
Koristeći v6 osposobljavamo OSPF direktno na interfejsu.
Provjerimo sada da li sve funkcionira kako treba:
R1#sh ipv6 route ospf
...
O 2:2:2::2/128 [110/64]
via FE80::C001:71FF:FE12:0, Serial0/0
O 3:3:3::3/128 [110/128]
via FE80::C001:71FF:FE12:0, Serial0/0
O 10:1:1:23::/64 [110/128]
via FE80::C001:71FF:FE12:0, Serial0/0
R2#sh ipv6 route ospf
...
O 1:1:1::1/128 [110/64]
via FE80::C000:71FF:FE12:0, Serial0/0
O 3:3:3::3/128 [110/64]
via FE80::C002:71FF:FE12:0, Serial0/1
R3#sh ipv6 route ospf
...
O 1:1:1::1/128 [110/128]
via FE80::C001:71FF:FE12:0, Serial0/1
O 2:2:2::2/128 [110/64]
via FE80::C001:71FF:FE12:0, Serial0/1
O 10:1:1:12::/64 [110/128]
via FE80::C001:71FF:FE12:0, Serial0/1
Možemo vidjeti da se naše IPv6 ruting tabele popunjavaju.
Sada ćemo probati da pingamo R3’s loopback interfejs sa R1:
R1#ping 3:3:3::3 Sending 5, 100-byte ICMP Echos to 3:3:3::3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 0/2/4 ms
Sve radi!
