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【old】OSPF ipv6

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※noteから引っ越してきた記事

初期設定

show ipv6 protocols
show ipv6 ospf
show ipv6 ospf neighbor
show ipv6 ospf database
show ipv6 route
show ipv6 ospf int

リンクローカルの扱いとか確認しておきたい。

RT1

en
terminal length 0
conf t
hostname iosv-0
line console 0
logging synchronous
exit
!
ipv6 unicast-routing
!
int gi0/0
ipv6 address 2001:1:1:12::1/64
ipv6 ospf 1 area 0
no shut
exit
!
int gi0/1
ipv6 address 2001:1:1:1::1/64
ipv6 ospf 1 area 1
no shut
exit
!
ipv6 router ospf 1
router-id 1.1.1.1
end
!

infraexpertには記載あるけど必要あるのか？
int range gi0/0-1
ipv6 address fe80::1 link-local

あとで追加(RT1,2共通)
int gi0/0
ipv6 ospf network point-to-point

あとで追加２(RT1,2共通)
ipv6 ospf 1
passive-interface gi0/1

RT2

en
terminal length 0
conf t
hostname iosv-1
line console 0
logging synchronous
exit
!
ipv6 unicast-routing
!
int gi0/0
ipv6 address 2001:1:1:12::2/64
ipv6 ospf 1 area 0
no shut
exit
!
int gi0/1
ipv6 address 2001:1:1:2::2/64
ipv6 ospf 1 area 2
no shut
exit
!
ipv6 router ospf 1
router-id 2.2.2.2
end
!

iosv-1(config)#router ospf 1
iosv-1(config-router)#router-id 1.1.1.1

iosv-1#sh ipv6 ospf neighbor
%OSPFv3 1 address-family ipv6 not running, please configure a router-id

ルータIDを設定しなさいと言われるも、直前で設定してるじゃんという気持ち。典型的な罠。

iosv-1(config)#router ospfv3 1
iosv-1(config-router)#router-id 1.1.1.1
*Jun 19 12:15:13.678: %OSPFv3-5-ADJCHG: Process 1, IPv6, Nbr 2.2.2.2 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

router ospfv3 でルータIDを設定しないといけなかったんですね。

iosv-1#sh ipv6 ospf neighbor

        OSPFv3 Router with ID (1.1.1.1) (Process ID 1)

Neighbor ID     Pri   State           Dead Time   Interface ID    Interface
2.2.2.2           1   FULL/DR         00:00:35    2               GigabitEthernet0/0
iosv-1#sh ipv6 route | b Application
lA - LISP away, a - Application
C   2001:1:1:1::/64 [0/0]
via GigabitEthernet0/1, directly connected
L   2001:1:1:1::1/128 [0/0]
via GigabitEthernet0/1, receive
OI  2001:1:1:2::/64 [110/2]
via FE80::2, GigabitEthernet0/0
C   2001:1:1:10::/64 [0/0]
via GigabitEthernet0/0, directly connected
L   2001:1:1:10::1/128 [0/0]
via GigabitEthernet0/0, receive
L   FF00::/8 [0/0]
via Null0, receive

OSPFで学習したルートのネクストホップがリンクローカルになっている

iosv-2(config)#int gi0/0
iosv-2(config-if)#no ipv6 address fe80::2 link-local
iosv-2(config-if)#
*Jun 19 12:33:36.072: %OSPFv3-5-ADJCHG: Process 1, IPv6, Nbr 1.1.1.1 on GigabitEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached
iosv-2(config-if)#
*Jun 19 12:33:37.273: %OSPFv3-5-ADJCHG: Process 1, IPv6, Nbr 1.1.1.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

iosv-1#sh ipv6 route | b Application
       lA - LISP away, a - Application
C   2001:1:1:1::/64 [0/0]
     via GigabitEthernet0/1, directly connected
L   2001:1:1:1::1/128 [0/0]
     via GigabitEthernet0/1, receive
OI  2001:1:1:2::/64 [110/2]
     via FE80::5054:FF:FE17:9B97, GigabitEthernet0/0
C   2001:1:1:10::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2001:1:1:10::1/128 [0/0]
     via GigabitEthernet0/0, receive
L   FF00::/8 [0/0]
     via Null0, receive

・手動設定したリンクローカルを削除すると、一旦ネイバーが解除されたあとすぐに復活
・今度は自動生成されたリンクローカルアドレスがネクストホップになる

↑v6のHelloが送信されていることを確認

iosv-1(config)#int gi0/0
iosv-1(config-if)#ipv6 ospf network point-to-point
(iosv-2でも同様に設定)

iosv-1#sh ipv6 ospf neighbor

            OSPFv3 Router with ID (1.1.1.1) (Process ID 1)

Neighbor ID     Pri   State           Dead Time   Interface ID    Interface
2.2.2.2           0   FULL/  -        00:00:39    2               GigabitEthernet0/0

・動作はv4と同じでDR/BDRを選出しなくなる

参考

IPv6 – OSPFv3