Is OSPFv3 and OSPFv2 compatible?
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.
In which ways is OSPFv2 similar to OSPFv3?
OSPFv2 and OSPFv3 are very similar. OSPFv3 still establishes neighbor adjacencies, has areas, different network types, the same metrics, runs SPF, etc. There are however some differences. OSPFv2 runs on top of IPv4 and since OSPFv3 runs on IPv6, some changes had to be made.
What technology was available in OSPFv2 but is not in OSPFv3 and instead gets this functioning from IPsec?
Authentication method changes: OSPFv2 authentication is achieved by implementing a shared secret and MD5 HMAC supported as part of the OSPFv2 protocol. OSPFv3 does away its own support for authentication entirely, instead relying on the more flexible IPsec framework offered by IPv6.
What is OSPFv3?
OSPFv3 is the Open Shortest Path First routing protocol for IPv6. It is similar to OSPFv2 in its concept of a link state database, intra- and inter-area, and AS external routes and virtual links. It is possible to enable OSPF and OSPFv3 at the same time. OSPF works with IPv4, and OSPFv3 works with IPv6.
Does IPv4 support OSPFv3?
The OSPFv3 address families feature enables both IPv4 and IPv6 unicast traffic to be supported. With this feature, you may have two device processes per interface, but only one process per AF. If the IPv4 AF is used, an IPv4 address must first be configured on the interface, but IPv6 must be enabled on the interface.
What is OSPFv3 used to uniquely identify a router?
NOTE: The LS type, Link State ID, and Advertising Router fields can uniquely identify an LSA….LSR Packet.
| Field | Length | Description |
|---|---|---|
| Advertising Router | 32 bits | Router ID of the ME device that generates the LSA. |
Is OSPFv3 only for IPv6?
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. Organizations can now combine the configuration of IPv4 and IPv6 into a single OSPFv3 process that can work equally well for both IP protocols.
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.
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.
Which command will identify if OSPFv3 is enabled?
In OSPFv3, the configuration is entirely different. To declare an OSPFv3 process id and to start the OSPFv3 process, we use “ipv6 router ospf ” Cisco IOS command from the global configuration mode. OSPFv3 Router ID is still a 32 bit binary number.
What is a Type 2 LSA?
LSA Type 2 – OSPF Network LSA LSA Type 2 (Network LSA) packets are generated by the Designated Router (DR) to describe all routers connected to its segment directly. LSA Type 2 packets are flooded between neighbors in the same area of origin and remain within that area.
What is the difference between openospfv2 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.
What is the difference between OSPF v3 and V6?
As compared, OSPFv3 does not require a Network mask to form an adjacency formation. Adjacency is formed on the link local as v6 runs on per link instead of per subnet. Dead intervals field reduced to 16 bits from 32. Note: Intra-Area Prefix LSA is a new LSA in OSPFv3 and used in order to advertise one or more IPv6 prefixes.
What is the difference between OSPFv2 and LSA types?
Here is an overview of all OSPFv2 and OSPFv3 LSA types: The LSA types are still the same except type 3 is now called the Inter-Area Prefix LSA and type 4 is called the Inter-Area router LSA. The last two types, the link LSA, and intra-area prefix LSA are new to OSPFv3.
What is the header size of OSPFv2?
The header size of OSPFv2 is 24 bytes. While the header size of OSPFv2 is 16 bytes. 3. OSPFv2 have seven link-state advertisement.