In 60 Days – ICND2
OSPFv3
OSPFv3
• Defined in RFC 2740
• Based on OSPFv2 with enhancements
• Router can run both v2 and v3
simultaneously
• Share many of the same packet types
and mechanisms
Router ID
• Configured as an IPv4 address
• Manually added if no active IPv4
interfaces
Router(config)#ipv6 router ospf 1
%OSPFv3-4-NORTRID: OSPFv3 process 1 could not pick a router-id, please configure
manually
Router(config-rtr)#router-id 1.1.1.1
OSPFv3 Runs on Links
• Negates the need for network statements
• Configure OSPF on the link (and globally)
Router(config)#int f0/0
Router(config-if)#ipv6 enable
Router(config-if)#ipv6 ospf 1 area 0
OSPF process ID must match global process ID.
OSPFv3 Adjencies
• Uses link-local addresses
R1#show ipv6 ospf interface f0/0
FastEthernet0/0 is up, line protocol is up
Link Local Address FE80::290:2BFF:FE43:E201 ,
Interface ID 1
Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1
Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 2.2.2.2, local address
FE80::290:2BFF:FE43:E201
Multicasting
• FF02::5 equivalent of 224.0.0.5
(all SPF routers)
• FF02::6 equivalent of 224.0.0.6
(designated routers)
• Only ever travels one hop
Configuring OSPFv3
1.
2.
3.
4.
Enable IPv6 globally ipv6 unicast-routing
Add OSPF process ipv6 router ospf 1
Add the router-id router-id 1.1.1.1
Enable per link Router(config-if)#ipv6 ospf 1 area 0
(interface)
Basic OSPFv3 Network
R1(config)#ipv6 unicast-routing
R1(config)#ipv6 router ospf 1
R1(config-rtr)#router-id 1.1.1.1
R1(config-rtr)#exit
R1(config)#interface Fa0/0
R1(config-if)#ipv6 add 3fff:1234:abcd:1::1/64
R1(config-if)#ipv6 enable
R1(config-if)#ipv6 ospf 1 Area 0
R1(config-if)#exit
R3(config)#ipv6 unicast-routing
R3(config)#ipv6 router ospf 3
R3(config-rtr)#router-id 2.2.2.2
R3(config-rtr)#exit
R3(config)#interface Fa0/0
R3(config-if)#ipv6 add 3fff:1234:abcd:1::3/64
R3(config-if)#ipv6 enable
R3(config-if)#ipv6 ospf 3 Area 0
R3(config-if)#exit
Basic OSPFv3 Network
R1#show ipv6 ospf nei
R2#show ipv6 ospf int f0/0
FastEthernet0/0 is up, line protocol is
up
Link Local Address
FE80::290:CFF:FE66:5E01 , Interface ID 1
Area 0, Process ID 1, Instance ID 0,
Router ID 2.2.2.2
Interface ID
Interface
1
Neighbor ID
Pri
State
Dead Time
2.2.2.2
1
FULL/DR
00:00:32
FastEthernet0/0
R1#show ipv6 ospf nei detail
Neighbor 2.2.2.2, interface address FE80::290:CFF:FE66:5E01
In the area 0 via interface FastEthernet0/0
Neighbor priority is 1, State is FULL, 6 state changes
DR is 2.2.2.2 BDR is 1.1.1.1
Options is 0x10
Dead timer due in 00:00:30
Neighbor is up for 01:48:17
Last retransmission scan time is 0 msec, maximum is 0 msec
R1#
R2(config)#int lo0
R2(config-if)#ipv6 address 2000:aaaa:bbbb:cccc::1/128
R2(config-if)#ipv6 ospf 1 area 0
R1#show ipv6 route
IPv6 Routing Table - 4 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route, M - MIPv6
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
D - EIGRP, EX - EIGRP external
O
2000:AAAA:BBBB:CCCC::1/128 [110/1]
via FE80::290:CFF:FE66:5E01, FastEthernet0/0
C
AAAA:BBBB:CCCC:DDDD::/64 [0/0]
via ::, FastEthernet0/0
L
AAAA:BBBB:CCCC:DDDD::1/128 [0/0]
via ::, FastEthernet0/0
L
FF00::/8 [0/0]
via ::, Null0
Hello Packet
• No address information
• Only link-local (now the Link State ID)
R1#debug ipv6 ospf adj
OSPFv3 adjacency events debugging is on
R1#
00:47:54: OSPF: Rcv hello from 2.2.2.2 area 0 from
FastEthernet0/0 FE80::290:CFF:FE66:5E01
Passive Interface
•
•
•
•
Suppresses OSPF updates on an interface
Does not send updates or establish adjacencies
Interface is part of the routing network
Routing updates received but not sent
F0/0
F0/0
X
B
F0/1
F0/1
F0/1
F0/0
A
C
RouterA(config-rtr)#passive-interface fast 0/0
OR
R1(config-rtr)#passive-interface default
R1(config-rtr)#no passive-interface fastEthernet 0/1
End