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Configuring OSPFv3 Overview

OSPFv3 Support in Virtual Routers

In dynamic routing protocols, each virtual router (VR) in the security device uses a unique virtual router identifier (VRID) to communicate with other routing devices. The identifier uses a dotted decimal notation, similar to an IP address, or an integer value. The router ID of the OSPFv3 instance is always equal to the VRID of the VR that it belongs to. Select Virtual Router > edit a VR > Dynamic Routing Protocol, and then select the Configured OSPFv3 Instance check box to configure a OSPFv3 instance.

OSPFv3 Support in Interfaces

OSPFv3 is supported in tunnel interfaces. You can enable OSPFv3 on tunnel interfaces in the same way as any regular physical interface. By default, you can assign the tunnel as a point-to-point link OSPFv3. There must be at least one pure IPv6 IPsec or IPv6 over IPv4 IPsec VPN to make the two OSPFv3 routers at the end of the tunnel interface communicate adjacently. OSPFv3 is supported on all IPv6 physical interfaces.

OSPFv3 Area Parameters

You can configure the following area parameters in an OSPFv3 area as described in Table 1.

Table 1: OSPFv3 Area Parameters

OSPFv3 Area Parameters	Description
Area range	Allows a group of subnets to be consolidated into a single network address. This range can be advertised in a single summary link advertisement to other areas. When you configure an area range, you can specify whether to advertise or withhold the defined area range in advertisements.
Metric of default route	Specifies the metric for the default route advertisement.
Filter out summary LSAs	Specifies that the summary link state advertisements (LSAs) are not advertised in the area.

Redistribution Rules

Route redistribution is the exchange of route information between the routing protocols. Redistribution routes can be outlined based on the summary list or filtered based on the IPv6 enabled route-map. The IPv6 routes can be redistributed into the OSPFv3 routing instance in the same VR. You can also summarize the routers redistributed in Dynamic Routing Protocol > OSPFv3 > Summary Import. You can also enhance Border Gateway Protocol (BGP) to redistribute OSPFv3 route. The OSPFv3 routes can be redistributed with RIPng also.

OSPFv3 Interface Parameters

Table 2 describes the interface parameters in an OSPFv3 enabled interface that you can configure.

Table 2: Interface Parameters

Interface Parameters	Description
Cost	Specifies the metric for the interface. The cost associated with an interface depends upon the bandwidth of the link to which the interface is connected. The higher the bandwidth, the lower the cost value is.
Hello Interval (Secs)	Specifies the interval at which OSPFv3 sends out hello packets to the network.
Configure to ignore mtu mismatch in DB exchange	Specifies any mismatches in the maximum transmission unit (MTU) values between the local and remote interfaces that are found during OSPFv3 database negotiations are ignored.
Instance ID	Controls some of the other routers as your neighbors. You can become neighbors only with routers having same instance ID.
Interface Link Type	Specifies that OSPFv3 treats an interface as a point-to-point link or as a point-to-multipoint link.
Interface OSPFv3 Passive Mode	Specifies that the IP address of the interface is advertised into the OSPFv3 domain as an OSPFv3 route, but the interface does not transmit or receive OSPFv3 packets.
OSPFv3 Priority	Specifies the priority of the VR as a designated router or a backup designated router. The router with the larger priority value has the best chance (although not guaranteed) of being elected.
Retransmit Interval	Specifies the number of seconds that elapses before the interface resends an LSA to a neighbor that did not respond to the original LSA.
Transit Delay	Specifies the number of seconds between transmissions of link-state update packets sent to the interface.

OSPFv3 Route Preference

OSPFv3 uses route preferences to select which route is installed in the forwarding table, when several protocols calculate routes to the same destination. The route with the lowest preference value is selected. For OSPFv3 and OSPFv3 External Type 2, select any value between 0 and 255.