ospf6d is a daemon support OSPF version 3 for IPv6 network. OSPF for IPv6 is described in RFC 2740.

OSPF6 router

router ospf6
ospf6 router-id A.B.C.D

Set router’s Router-ID.

interface IFNAME area AREA

Bind interface to specified area, and start sending OSPF packets. area can be specified as 0.

no timers throttle spf

This command sets the initial delay, the initial-holdtime and the maximum-holdtime between when SPF is calculated and the event which triggered the calculation. The times are specified in milliseconds and must be in the range of 0 to 600000 milliseconds.

The delay specifies the minimum amount of time to delay SPF calculation (hence it affects how long SPF calculation is delayed after an event which occurs outside of the holdtime of any previous SPF calculation, and also serves as a minimum holdtime).

Consecutive SPF calculations will always be separated by at least ‘hold-time’ milliseconds. The hold-time is adaptive and initially is set to the initial-holdtime configured with the above command. Events which occur within the holdtime of the previous SPF calculation will cause the holdtime to be increased by initial-holdtime, bounded by the maximum-holdtime configured with this command. If the adaptive hold-time elapses without any SPF-triggering event occurring then the current holdtime is reset to the initial-holdtime.

router ospf6
 timers throttle spf 200 400 10000

In this example, the delay is set to 200ms, the initial holdtime is set to 400ms and the maximum holdtime to 10s. Hence there will always be at least 200ms between an event which requires SPF calculation and the actual SPF calculation. Further consecutive SPF calculations will always be separated by between 400ms to 10s, the hold-time increasing by 400ms each time an SPF-triggering event occurs within the hold-time of the previous SPF calculation.

auto-cost reference-bandwidth COST
no auto-cost reference-bandwidth

This sets the reference bandwidth for cost calculations, where this bandwidth is considered equivalent to an OSPF cost of 1, specified in Mbits/s. The default is 100Mbit/s (i.e. a link of bandwidth 100Mbit/s or higher will have a cost of 1. Cost of lower bandwidth links will be scaled with reference to this cost).

This configuration setting MUST be consistent across all routers within the OSPF domain.

OSPF6 area

Area support for OSPFv3 is not yet implemented.

OSPF6 interface

ipv6 ospf6 cost COST

Sets interface’s output cost. Default value depends on the interface bandwidth and on the auto-cost reference bandwidth.

ipv6 ospf6 hello-interval HELLOINTERVAL

Sets interface’s Hello Interval. Default 10

ipv6 ospf6 dead-interval DEADINTERVAL

Sets interface’s Router Dead Interval. Default value is 40.

ipv6 ospf6 retransmit-interval RETRANSMITINTERVAL

Sets interface’s Rxmt Interval. Default value is 5.

ipv6 ospf6 priority PRIORITY

Sets interface’s Router Priority. Default value is 1.

ipv6 ospf6 transmit-delay TRANSMITDELAY

Sets interface’s Inf-Trans-Delay. Default value is 1.

ipv6 ospf6 network (broadcast|point-to-point)

Set explicitly network type for specified interface.

Redistribute routes to OSPF6

redistribute static
redistribute connected
redistribute ripng

Showing OSPF6 information

show ipv6 ospf6 [INSTANCE_ID]

INSTANCE_ID is an optional OSPF instance ID. To see router ID and OSPF instance ID, simply type “show ipv6 ospf6 <cr>”.

show ipv6 ospf6 database

This command shows LSA database summary. You can specify the type of LSA.

show ipv6 ospf6 interface

To see OSPF interface configuration like costs.

show ipv6 ospf6 neighbor

Shows state and chosen (Backup) DR of neighbor.

show ipv6 ospf6 request-list A.B.C.D

Shows requestlist of neighbor.

show ipv6 route ospf6

This command shows internal routing table.

show ipv6 ospf6 zebra

Shows state about what is being redistributed between zebra and OSPF6

OSPF6 Configuration Examples

Example of ospf6d configured on one interface and area:

interface eth0
 ipv6 ospf6 instance-id 0
router ospf6
 ospf6 router-id
 area range 2001:770:105:2::/64
 interface eth0 area