Configuring OSPF v3¶
Basic elements for configuration¶
The configuration of OSPF v3 in a single area is similar to the configuration of OSPF v2, with slight changes. The creation of the routing instance is similar with what has been done for OSPF v2.
Here is a sample OSPF v3 configuration. OSPF v3 is activated on interfaces
eth0_0 and eth1_0. The interface eth1_0 is in passive mode, which means
it only emits OSPF packets and does not receive them.
vrf main
routing ospf6
router-id 10.125.0.1
interface eth1_0 area 0.0.0.0
interface eth0_0 area 0.0.0.0
..
..
routing interface eth1_0
ipv6 ospf6 passive true
You can disable OSPF v3 without having to remove the configuration, by using following command:
vrf main
routing ospf6
enabled false
Nonetheless, it is always possible to suppress OSPF v3 configuration:
vrf main
del routing ospf6
..
Verifying operation¶
The following commands can be used to verify OSPF v3 operation.
Display the global OSPF parameters (timers, area, router-id, etc.):
vsr> show ospf6
OSPFv3 Routing Process (0) with Router-ID 10.125.0.1
Running 00:00:44
LSA minimum arrival 1000 msecs
Initial SPF scheduling delay 0 millisec(s)
Minimum hold time between consecutive SPFs 50 millsecond(s)
Maximum hold time between consecutive SPFs 5000 millsecond(s)
Hold time multiplier is currently 1
SPF algorithm last executed 00:00:22 ago, reason L+
Last SPF duration 0 sec 40 usec
SPF timer is inactive
Number of AS scoped LSAs is 0
Number of areas in this router is 1
Area 0.0.0.0
Number of Area scoped LSAs is 2
Interface attached to this area: eth0_0 eth1_0
SPF last executed 22.662241s ago
Display the OSPF v3 route:
vsr> show ospf6 route
*N IA 2001:500:1::/64 :: eth0_0 00:02:50
*N IA 3ffe:1::/64 :: eth1_0 00:02:50
Display the OSPF configuration for the specified interface:
vsr> show ospf6 interface eth0_0
eth0_0 is up, type BROADCAST
Interface ID: 3
Internet Address:
inet6: 2001:500:1::1/64
inet6: fe80::dced:1ff:fe4c:9269/64
Instance ID 0, Interface MTU 1500 (autodetect: 1500)
MTU mismatch detection: enabled
Area ID 0.0.0.0, Cost 100
State DR, Transmit Delay 1 sec, Priority 1
Timer intervals configured:
Hello 10, Dead 40, Retransmit 5
DR: 10.1.1.1 BDR: 0.0.0.0
Number of I/F scoped LSAs is 1
0 Pending LSAs for LSUpdate in Time 00:00:00 [thread off]
0 Pending LSAs for LSAck in Time 00:00:00 [thread off]
Display the state of the relations with the neighbors:
vsr> show ospf6 neighbor
Neighbor ID Priority Interface Interface state State Uptime Dead-time
=========== ======== ========= =============== ===== ====== =========
10.125.0.2 1 eth1_0 backup-designated-router full/designated-router 11m58s 7.605s
Configuration example¶
Basic OSPF v3 configuration¶
rt1
vrf main
routing ospf6
router-id 10.1.1.1
interface eth0_0 area 0.0.0.0
interface eth1_0 area 0.0.0.0
..
..
interface
physical eth1_0
ipv6 address 3ffe:1::1/64
..
..
physical eth0_0
ipv6 address 2001:500:1::1/64
..
..
rt2
vrf main
routing ospf6
router-id 10.1.1.2
interface eth0_0 area 0.0.0.0
interface eth1_0 area 0.0.0.0
interface eth2_0 area 0.0.0.0
..
..
interface
physical eth2_0
ipv6 address 3ffe:2::2/64
..
..
physical eth0_0
ipv6 address 2001:500:1::2/64
..
..
physical eth1_0
ipv6 address 2001:500:2::2/64
..
..
rt3
vrf main
routing ospf6
router-id 10.1.1.3
interface eth0_0 area 0.0.0.0
interface eth1_0 area 0.0.0.0
..
..
interface
physical eth0_0
ipv6 address 3ffe:3::3/64
..
..
physical eth1_0
ipv6 address 2001:500:2::3/64
..
..
Check OSPF v3 operations:
rt1> show ospf6 neighbor
Neighbor ID Priority Interface Interface state State Uptime Dead-time
=========== ======== ========= =============== ===== ====== =========
10.1.1.2 1 ntfp1 backup-designated-router full/designated-router 03m25s 32.605s
Note
The state must be at Full, otherwise, this means that the OSPF v3
neighberhood is not correctly formed.
rt1> show ospf6 route
Destination Gateway I/F
---------------------------
*N Ia 2001:500:2::/64 :: eth1_0 00:17:01
*N Ia 2001:500:1::/64 fe80::dced:1ff:fee4:395c eth1_0 00:16:56
*N Ia 3ffe:1::/64 :: eth1_0 00:17:01
*N Ia 3ffe:2::/64 fe80::dced:1ff:fee4:395c eth1_0 00:16:56
*N Ia 3ffe:3::/64 fe80::dced:1ff:fee4:395c eth1_0 00:16:56
Display the OSPF v3 Link-State databases and information about LSAs (Link State Advertisements)
vsr> show ospf6 database
Area Scoped Link State Database (Area 0.0.0.0)
Type LSId AdvRouter Age SeqNum Payload
Rtr 0.0.0.0 10.1.1.1 429 80000002 10.1.1.1/0.0.0.3
Rtr 0.0.0.0 10.1.1.2 237 80000003 10.1.1.1/0.0.0.3
Rtr 0.0.0.0 10.1.1.2 237 80000003 10.1.1.2/0.0.0.8
Rtr 0.0.0.0 10.1.1.3 238 80000002 10.1.1.2/0.0.0.8
Net 0.0.0.3 10.1.1.1 429 80000001 10.1.1.1
Net 0.0.0.3 10.1.1.1 429 80000001 10.1.1.2
Net 0.0.0.8 10.1.1.2 237 80000001 10.1.1.2
Net 0.0.0.8 10.1.1.2 237 80000001 10.1.1.3
INP 0.0.0.0 10.1.1.1 429 80000003 3ffe:1::/64
INP 0.0.0.3 10.1.1.1 429 80000001 2001:500:1::/64
INP 0.0.0.0 10.1.1.2 237 80000004 3ffe:2::/64
INP 0.0.0.8 10.1.1.2 237 80000001 2001:500:2::/64
INP 0.0.0.0 10.1.1.3 238 80000003 3ffe:3::/64
I/F Scoped Link State Database (I/F loop in Area 0.0.0.0)
Type LSId AdvRouter Age SeqNum Payload
Lnk 0.0.0.5 10.1.1.1 1116 80000001 fe80::4426:67ff:fef5:88b4
I/F Scoped Link State Database (I/F ntfp1 in Area 0.0.0.0)
Type LSId AdvRouter Age SeqNum Payload
Lnk 0.0.0.3 10.1.1.1 1109 80000001 fe80::dced:1ff:fe4c:9269
Lnk 0.0.0.6 10.1.1.2 432 80000001 fe80::dced:1ff:fee4:395c
AS Scoped Link State Database
Type LSId AdvRouter Age SeqNum Payload