OSPFv2: It was the earlier model of OSPF which was used just for IPv4. Therefore its can be known as the IPv4 model of OSPF.
OSPFv3: With the arrival of IPv6, a brand new model of OSPF is developed and therefore it’s known as the IPv6 model of OSPF. OSPFv3 is basically just like OSPFv2 within the fundamental options, nevertheless it has few extensions.
Earlier than discussing the variations between the 2 forms of variations i.e. OSPFv2 vs OSPFv3, it’s important to know the similarities between the 2.
Similarities between OSPFv1 & OSPFv2
Notable is that OSPFv3 has few similarities with that of IPv4 model i.e. OSPFv2. A few of them are:
- Packet Sort: Each have 5 Packet Sorts particularly Good day, DD, LSA, LSU, LSAck
- Interface Sort: Each assist totally different Interface Sorts like P2P, P2M, NBMA, Broadcast, Digital.
- Neighbor Discovery Sample: Each have comparable Neighbour Discovery.
- LSA flooding & getting old: Each assist LSA flooding & getting old.
- SPF algorithm: Each use SPF algorithm for routing calculation.
- Hierarchical Areas: Each assist Hierarchical Areas.
- LSA Sorts: 7 LSA varieties are equivalent
Variations between OSPFv1 & OSPFv2
IP model: As mentioned earlier, OSPFv2 helps IPv4 routed protocol whereas OSPFv3 helps the most recent routed protocol model i.e. IPv6.
Multicast Tackle: OSPFv2 helps multicast addresses 224.0.0.5 and 224.0.0.6. Then again, OSPFv3 helps multicast tackle FF02::5 and FF02::6
OSPF Situations: OSPFv2 doesn’t assist multiples OSPF situations per interface, whereas, OSPFv3 helps multiples OSPF situations per interface.
Authentication: OSPFv2 helps plain textual content and MD5 authentication. Then again, OSPF v3 helps IPv6 authentication.
Subnets/Hyperlinks: OSPFv2 runs on the community/subnets, whereas OSPFv3 runs on the hyperlinks. So, the adjaceny is established over hyperlink native addresses in OSPFv3 and there’s no requirement of a community masks.
IP Unicast Routing: IPv4 unicast routing is enabled by default in OSPFv2. Nevertheless, in OSPFv3, The IPv6 Unicast routing must be enabled utilizing “IP Unicast-routing” international configuration command, as it isn’t allow by default.
Flooding Scope: There isn’t a flooding scope in OSPFv2. However flooding scope is current in OSPFv3. The 2 bits of LSA known as “S- bits” point out flooding scope.
Header Measurement: The header measurement of OSPFv2 is 24 bytes. and that of OSPFv3 is 16 Bytes.
LSA Sorts: Along with fundamental 7 LSA varieties current in OSPFv2, OSPFv3 has two extra LSA varieties. There’s a variation within the title of LSA varieties 3 and 4 (proven in desk beneath). The 2 new LSA varieties are known as “Hyperlink LSA” and “Intra-Space Prefix LSA”. The function of “Hyperlink LSA” is to inform link-local addresses, as it’s in link-local scope, so it’s by no means flooded. The function of “Intra-Space Prefix” LSA is to promote IPv6 prefixes.
Neighbourship: OSPFv2 establishes neighbourship over IPv4 tackle whereas OSPFv3 establishes neighbourship over Hyperlink-local tackle.
Comparability Desk: OSPFV2 vs OSPFV3
Following desk lists the principle variations between OSPFv2 and OSPFv3:
Obtain the comparability desk: OSPFv2 vs OSPFv3
Proceed Studying:
Understanding OSPF Ahead Tackle
Configuring OSPF Passive Interface
