Are OSPFv2 and OSPFv3 compatible?

Operation of OSPFv3 Constants and variables such as timers and metrics are also the same. Another similarity to the relationship of RIPng to RIPv2 is that OSPFv3 is not backward-compatible with OSPFv2. So if you want to use OSPF to route both IPv4 and IPv6, you must run both OSPFv2 and OSPFv3.

Which is a difference between OSPFv2 and OSPFv3?

OSPFv2 stands for Open Shortest Path First version 2 and OSPFv3 stands for Open Shortest Path First version 3. OSPFv2 is the IPv4’s OSPF version, whereas OSPFv3 is the IPv6’s OSPF version. In OSPFv2, many OSPF instances per interface are not supported, whereas in OSPFv3, many OSPF instances per interface are supported.

Which LSA type in OSPFv3 is used for link local updates?

Type 8 – A link-local only LSA for OSPFv3. A Type 8 LSA is used to give information about link-local addresses and a list of IPv6 addresses on the link.

Which OSPFv3 LSA type is used by ASBRs?

LSA Type 5
LSA Type 5: OSPF ASBR External LSA. LSA Type 6: OSPF Group Membership LSA. LSA Type 7: OSPF Not So Stubby Area (NSSA) External LSA. LSA Type 8: OSPF External Attributes LSA (OSPFv2) / Link Local LSA (OSPFv3)

Does IPv4 support OSPFv3?

OSPFv3 does not only support exchange of IPv6 routes, but it also supports exchange of IPv4 routes. The newest OSPFv3 configuration approach utilizes a single OSPFv3 process. It is capable of supporting IPv4 and IPv6 within a single OSPFv3 process.

How do I enable OSPFv3?

Enabling OSPFv3

  1. Enter the configure terminal command to access global configuration mode. device# configure terminal.
  2. Enter the ip router-id command to specify the router ID.
  3. Enter the ipv6 router ospf command to enter OSPFv3 router configuration mode and enable OSPFv3 on the device.

What are the features of OSPFv3?

OSPFv3 Features

  • Basic OPSFv3.
  • OSPFv3 interface.
  • Passive interface.
  • Redistribution and its attributes.
  • OSPFv4 area parameters.
  • Virtual link.
  • External database limit.
  • Demand extension.

Which type of LSA with ospfv3 describes the link local address information?

Link LSAs have link-local flooding scope. Each Link LSA describes the IPv6 address prefix of the link and Link-local address of the router. Intra-Area-Prefix LSA—Type-9 LSA.

Which are new LSA types in OSPF for IPv6 ospfv3 choose two?

Instead, IPv6 address advertisements now happen in the two brand new LSA types: Link LSAs (Type 8), and Intra-Area Prefix LSAs (Type 9).

Does OSPF support IPv6?

OSPF is a widely used IGP in IPv4, IPv6, and dual-stack (IPv4/IPv6) environments. The OSPF upgrade to support IPv6 generated a number of significant changes to how the protocol behaves.

Is OSPFv3 only for IPv6?

Organizations now have multiple options for deploying OSPF. Organizations can stick with OSPFv2 for IPv4, and then use OSPFv3 for IPv6-only for a configuration that separates the control planes and the forwarding planes.

How do I enable IPv6 on OSPFv3?

To enable the OSPF-for-IPv6 process on an interface and assign that interface to an area, use the ipv6 ospf ospf-process area area-id command in the interface configuration mode. To be able to enable OSPFv3 on an interface, the interface must be enabled for IPv6.

What does type 8 link LSA in OSPF mean?

The Type 8 Link LSAs contain information just about the link-local IPv6 prefixes. This is quite a unique LSA, because it isn’t advertised throughout the area like most advertisements. Instead, it’s shared only across the local link. Here’s a list of all nine OSPFv3 LSAs, next to the equivalent LSA in IPv4 OSPF.

Which is the external attribute LSA in OSPFv2?

LSA Type 8 packets ( External Attributes LSA -OSPFv2-/ Link Local LSA -OSPFv3-) in OSPFv2 (IPv4) are called External Attribute LSAs, and are used to transit BGP attributes through an OSPF network while BGP destinations are conveyed via LSA Type 5 packets, however, this feature isn’t supported by most routers.

Where does the IPv6 address advertisements go in OSPFv3?

That’s exactly what some wise boffins did: in OSPFv3, the IP address information has been taken out of the Router LSA, which now exists only to advertise the physical links on a router. Instead, IPv6 address advertisements now happen in the two brand new LSA types: Link LSAs (Type 8), and Intra-Area Prefix LSAs (Type 9).

What are the new LSA types for IPv6?

Instead, IPv6 address advertisements now happen in the two brand new LSA types: Link LSAs (Type 8), and Intra-Area Prefix LSAs (Type 9). Let’s start with the new Type 9 Intra-Area Prefix LSAs, a long name that actually tells us exactly what it does: this advertisement contains a list of all the IPv6 address prefixes on an interface.

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