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What is the different between OSPF v2 and OSPF v3?
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.
Are OSPFv2 and OSPFv3 compatible?
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 for IPv6?
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.
Who invented OSPF?
Internet Engineering Task Force (IETF)
OSPF is developed by Internet Engineering Task Force (IETF) as one of the Interior Gateway Protocol (IGP), i.e, the protocol which aims at moving the packet within a large autonomous system or routing domain. It is a network layer protocol which works on the protocol number 89 and uses AD value 110.
How many versions of OSPF are there?
The first version of OSPF was described in RFC 1131, published in October 1989. This was quickly replaced by OSPF Version 2 in July 1991, described in RFC 1247. Since then there have been several revisions to the OSPF Version 2 standard, in RFCs 1583, 2178, and 2328, with the last of these the current standard.
What two multicast addresses does OSPFv3?
What two multicast addresses does OSPFv3 use? Explanation: Adjacencies and next-hop attributes now use link-local addresses, and OSPFv3 still uses multicast traffic to send its updates and acknowledgments with the addresses FF02::5 for OSPF routers and FF02::6 for OSPF designated routers.
What is the OSPFv3 router ID?
The Router ID uniquely identifies the router in the autonomous system. By default, Gaia Operating System selects the highest IPv4 address from all configured interfaces. The Router ID is used by the OSPFv3 and BGP protocols.
Is the router ID the same as OSPFv2?
OSPFv3 router ID: OSPFv3 is unable to set its own router ID like OSPFv2 does. Instead, you have to manually configure the router ID. It is configured as a 32-bit value, same as in OSPFv2. Multiple prefixes per interface: if you have multiple IPv6 prefixes on an interface then OSPFv3 will advertise all of them.
Which is more efficient OSPFv2 or ospf3?
By separating the SPF tree and prefixes, OSPFv3 is more efficient. When the link-local address on an interface changes, the router only has to flood an updated link LSA and intra-area-prefix LSA. Since there are no changes to the topology, we don’t have to flood type 1 and 2 LSA (s).
Can you run multiple instances of OSPFv3 per interface?
Multiple prefixes per interface: if you have multiple IPv6 prefixes on an interface then OSPFv3 will advertise all of them. Flooding scope: OSPFv3 has a flooding scope for different LSAs. Multiple instances per link: You can run multiple OSPFv3 instances on a single link.
Can a node have more than one OSPF process?
Multiple IP subnets can be assigned to a single link, and two nodes can communicate with each other even if they do not share a common IP subnet. Note: In OSPFv3, Instance ID is a new field that is used to have multiple OSPF process’ instance per link.