OSPFv3

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 (0-4294967295)

interface IFNAME area A.B.C.D: Bind interface to specified area, and start sending OSPF packets. area can be specified as 0.

timers throttle spf DELAY INITIAL-HOLDTIME MAX-HOLDTIME

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.

OSPF6 route-map

Usage of ospfd6’s route-map support.

set metric [+|-](0-4294967295): Set a metric for matched route when sending announcement. Use plus (+) sign to add a metric value to an existing metric. Use minus (-) sign to substract a metric value from an existing metric.

Redistribute routes to OSPF6

redistribute static

redistribute connected

redistribute ripng

Showing OSPF6 information

show ipv6 ospf6

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:

router ospf6
 ospf6 router-id 212.17.55.53
 area 0.0.0.0 range 2001:770:105:2::/64
 interface eth0 area 0.0.0.0
!