[CCIE学习笔记]IPV6 over NBMA Networks

The Scenario: To form an adjacency over NBMA by Link-Local only.

R1#sh ipv6 ospf nei

Neighbor ID     Pri   State           Dead Time   Interface ID   
Interface
172.16.102.1      1   FULL/DR         00:01:49    3              
Serial0/0
172.16.106.1      1   FULL/BDR        00:00:38    4              
ATM3/0


R1#sh run int s0/0
Building configuration...

Current configuration : 762 bytes
!
interface Serial0/0
ip address 172.16.123.1 255.255.255.0
ip access-group R3-http-security in
no ip unreachables
ip pim dense-mode
encapsulation frame-relay
ipv6 address FEC0::A:0:0:7B:1/125
ipv6 address FE80::2D0:58FF:FE95:C8A1 link-local
ipv6 rip FRAME-123 enable
ipv6 ospf neighbor FE80::201:42FF:FEA5:9CE1 priority 1  
<<<<<<<<<<<<<<
ipv6 ospf 1 area 0
frame-relay map ipv6 FEC0::A:0:0:7B:2 102
frame-relay map ipv6 FEC0::A:0:0:7B:3 103
frame-relay map ipv6 FE80::204:C1FF:FE8E:19E0 103 broadcast
frame-relay map ipv6 FE80::201:42FF:FEA5:9CE1 102 broadcast
frame-relay map ip 172.16.123.1 102 broadcast
frame-relay map ip 172.16.123.2 102 broadcast
frame-relay map ip 172.16.123.3 103 broadcast
no frame-relay inverse-arp
frame-relay lmi-type cisco
end

R1#sh ipv6 int s0/0
Serial0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::2D0:58FF:FE95:C8A1
  Global unicast address(es):
    FEC0::A:0:0:7B:1, subnet is FEC0::A:0:0:7B:0/125
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::5
    FF02::6
    FF02::9
    FF02::1:FF7B:1
    FF02::1:FF95:C8A1
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ND DAD is not supported
  ND reachable time is 30000 milliseconds
  Hosts use stateless autoconfig for addresses.

R1#sh ipv6 ospf int s0/0
Serial0/0 is up, line protocol is up
  Link Local Address FE80::2D0:58FF:FE95:C8A1, Interface ID 3
  Area 0, Process ID 1, Instance ID 0, Router ID 172.16.123.1
  Network Type NON_BROADCAST, Cost: 64  
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  Transmit Delay is 1 sec, State BDR, Priority 1
  Designated Router (ID) 172.16.102.1, local address
FE80::201:42FF:FEA5:9CE1
  Backup Designated router (ID) 172.16.123.1, local address
FE80::2D0:58FF:FE95:C8A1
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit
5
    Hello due in 00:00:03
  Index 1/1/1, flood queue length 0
  Next 0x0(0)/0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 172.16.102.1  (Designated Router)
  Suppress hello for 0 neighbor(s)
R1#

And for R2:

R2#sh ipv6 ospf nei

Neighbor ID     Pri   State           Dead Time   Interface ID   
Interface
172.16.123.1      1   FULL/BDR        00:01:37    3              
Serial0/0

R2#sh run int s0/0
Building configuration...

Current configuration : 674 bytes
!
interface Serial0/0
ip address 172.16.123.2 255.255.255.0
ip pim dense-mode
encapsulation frame-relay
ip ospf priority 0
ipv6 address FEC0::A:0:0:7B:2/125
ipv6 address FE80::201:42FF:FEA5:9CE1 link-local
ipv6 rip FRAME-123 enable
ipv6 ospf neighbor FE80::2D0:58FF:FE95:C8A1 priority 1
<<<<<<<<<<<<<<<<<<<
ipv6 ospf 1 area 0
frame-relay map ipv6 FEC0::A:0:0:7B:1 201 broadcast
frame-relay map ipv6 FEC0::A:0:0:7B:3 201
frame-relay map ipv6 FE80::2D0:58FF:FE95:C8A1 201 broadcast
frame-relay map ip 172.16.123.1 201 broadcast
frame-relay map ip 172.16.123.2 201 broadcast
frame-relay map ip 172.16.123.3 201 broadcast
no frame-relay inverse-arp
frame-relay lmi-type cisco
end

R2#sh ipv6 int s0/0
Serial0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::201:42FF:FEA5:9CE1
  Global unicast address(es):
    FEC0::A:0:0:7B:2, subnet is FEC0::A:0:0:7B:0/125
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::5
    FF02::6
    FF02::9
    FF02::1:FF7B:2
    FF02::1:FFA5:9CE1
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ND DAD is not supported
  ND reachable time is 30000 milliseconds
  Hosts use stateless autoconfig for addresses.
R2#

R2#sh ipv6 ospf int s0/0
Serial0/0 is up, line protocol is up
  Link Local Address FE80::201:42FF:FEA5:9CE1, Interface ID 3
  Area 0, Process ID 1, Instance ID 0, Router ID 172.16.102.1
  Network Type NON_BROADCAST, Cost: 64     <<<<<<<<<<<<<<<<<<<<<<<<
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 172.16.102.1, local address
FE80::201:42FF:FEA5:9CE1
  Backup Designated router (ID) 172.16.123.1, local address
FE80::2D0:58FF:FE95:C8A1
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit
5
    Hello due in 00:00:02
  Index 1/1/1, flood queue length 0
  Next 0x0(0)/0x0(0)/0x0(0)
  Last flood scan length is 3, maximum is 3
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 172.16.123.1  (Backup Designated Router)
  Suppress hello for 0 neighbor(s)
R2#

Thoughts:
There are a number of different tunnelling techniques:-
Manual
GRE/IPv4
IPv4 Compatible
6to4
ISATAP
The IPv4 compatibles can be ignored as they are being deprecated, however we should have an awareness of all of them.  If we can configure GRE tunnels then the first two are a cinch.  6to4 and ISATAP require a little more thought, and maybe worth some time understanding fully.