Ospfv3 and v2 router lsa comparison new bit removed in latest specs bit nt. Ospf version 3 for ipv6 techlibrary juniper networks. So does various protocols are becoming ipv6 compliant and as a result of that we have ospfv3 enhanced version of the most popular igp ospfv2. One such environment is the ipv6 home network where users expect to simply plug in a router and have it automatically use ospfv3 for intradomain routing. Rfc editor the rfc series contains technical and organizational documents about the internet, including the specifications and policy documents produced by four streams. Ospfv3 rfc 2740 open shortest path first version 3 ospfv3 for ipv6 support. Ospfv2, ospfv3 rfc 2328, 3101, 2740 isis bgpv4 rfc 1771,1997, 2858, 2545 ecmp equal cost multipath rfc 2992 explicit congestion notification ecn marking rfc3168 spanning tree protocol stp 802.
This is commonly referred to as multicast ospf mospf. Ospfv3, which is described in rfc 5340, expands on ospf version 2 to provide support for ipv6 routing prefixes and the larger size of ipv6 addresses. Ospf version 2, introduced as rfc 2328 in 1998, has been one of the most widely deployed interior gateway protocols igps for intradomain routing. Rfc 6106 support for ipv6 router advertisements with dns attributes. Gaia advanced routing r77 versions administration guide. This memo documents version 2 of the ospf protocol. Alcatellucents implementation of ospf conforms to ospf version 2 specifications presented in rfc 2328, ospf version 2 and ospf version 3 specifications presented in rfc 2740, ospf for ipv6. Ospfv3 still uses the autonomous areas to separate networks into areas. Rfc 4750, mentioned in this rfc as a should requirement is not supported. Ospf for ipv6 is also referred to as ospf version 3 ospfv3.
Ospf for ipv6 rfc 5340, july 2008 network working group r. Ospfv3 is defined in rfc 5340 which makes rfc 2740 obsolete. All vendors have since based their implementations of ospf on rfc 2328. Page 36 rfc 5187, ospfv3 graceful restart rfc 5250, the ospf opaque lsa option note. Rfc 2328 ospf version 2 rfc 2740 ospf version 3 rfc 11 describes the first iteration of ospf and it was used in initial tests to determine whether the protocol worked. The protocol is extended in version 3 rfc 2740 to support ospf in ipv6 networks. Nokias implementation of ospf conforms to ospf version 2 specifications presented in rfc 2328, ospf version 2 and ospf version 3 specifications presented in rfc 2740, ospf for ipv6. Hi folks, with depleting ipv4 address stack there is a compelling need to adopt ipv6 in your network.
Configuring ospfv3 to configure ospfv3, you must do the following. Ospfv3, specified in rfc 2740, is the protocols version for ipv6 routing. Extension 2740 ospfv3 1765 ospf db overflow 2787 vrrp mib 1850 ospf mib 3101 nssa 2082 rip2 md5 auth 37 ospf stub router advert 2328 ospfv2 3623 graceful restart 2338 vrrp 3768 vrrp dell policy based routing 5187 ospfv3 graceful restart multicast 1112 igmpv1 3810 mldv2 2236 igmpv2 3973 pimdm. All lsas are flooded throughout the ospf routing domain. Chapter 7 configuring ospf version 3 open shortest path first ospf is a linkstate routing protocol. The key differences between the ospfv3 and ospfv2 protocols are as follows. Therefore, the abovedescribed exemplary embodiments may be applied without violating rfc standards. Routers running ospf can be enabled with minimal configuration. For more information about these lsas, see rfc 2740. Ospfv3 can provide better interoperation between the ad hoc domain and the internet. Support for multiple protocol instances on a link is accomplished via an instance id contained in the ospf packet header and ospf interface data structures.
Pointtopoint networks a network that joins a single pair of routers. Chapter 7 configuring ospf version 3 hewlett packard. Ospfv3 is a candidate for deployments in environments where autoconfiguration is a requirement. This network configuration example describes ospf version 3 rfc 2740 for. Ospfv3 uses an ipv6 multicast address range of ff025 for ospf routes and ff026 for ospf designated routers when sending updates and acknowledgments. Ospfv3 is a linkstate routing protocol for ipv6 as its predecessor ospfv2 in ipv4.
Rfc 6164 using 127bit ipv6 prefixes on interrouter links. Differences with rfc 2740 ospfv3 implementations based on rfc 2740 will fully interoperate with implementations based on this specification. Standards track page 1 rfc 2740 ospf for ipv6 december 1999 all of ospf for ipv4s optional capabilities, including ondemand circuit support, nssa areas, and the multicast extensions to ospf mospf are also supported in ospf for ipv6. Ospfv3 rfc 2740 mpbgp rfc 25452858 eigrp for ipv6 static routing static routing with ipv6 is used and con. Ospfv3 specified in rfc 2740 ospfv3 uses same fundamental mechanisms as ospfv2 including. Ospfv3 uses the same fundamental mechanisms as ospfv2 lsas, flooding, the spf algorithm, etc. This is from rfc 3101, when set, the router is an nssa abr bit x. This used to be w bit for mospf and has been reclaimed in the latest ospfv3 rfc router interface information may be spread across multiple router lsas. However, some changes have been necessary, either due to changes in protocol semantics between ipv4 and ipv6, or simply to. Neither does rfc 2740 specify the storage structure of the routing table that supports multiple prefixes. In rfc 2740 ospfv3, flooding of unknown lsa was restricted within stub and nssa areas. The text describing this restriction is included below. Ospf routers generate routing updates only when read more.
Ospfv3 lsa types each lsa begins with a standard 20byte lsa header. The fundamental mechanisms of ospf flooding, dr election, area support, spf calculations, etc. There are, however, some protocol additions and changes all of which are backward compatible. Frr is a fully featured, high performance, free software ip routing suite frr implements all standard routing protocols such as bgp, rip, ospf, isis and more see feature matrix, as well as many of their extensions frr is a high performance suite written primarily in c. Ospfv3 expands on ospfv2 to provide support for ipv6 routing prefixes and the larger size of ipv6 addresses. Tcpip environment fast convergence variablelength subnet masks discontiguous subnets incremental updates route authentication runs on ip, protocol 89. Such a mask is often displayed elsewhere in the literature as 255. However, rfc 1850, the predecessor to rfc 4750 is supported. Rfc 2328 ospf version 2 april 1998 for example, the network mask for a class c ip network is displayed as 0xffffff00. Mpbgp4 rfc 2858 and rfc 2545 cisco ios supports all. Rfc 5340 ospf for ipv6 july 2008 another use for running multiple ospf instances is if you want, for one reason or another, to have a single link belong to two or more ospf areas. This document updates rfc 5340 by relaxing the hellointerval. This document describes the necessary mechanisms for ospfv3 to be selfconfiguring. Introduction this document describes the modifications to ospf to support version 6 of the internet protocol ipv6.
Ospf is classified as an interior gateway protocol igp. The flooding is reliable, ensuring all routers have the same collection of lsas. Introduction this document is a specification of the open shortest path first ospf tcpip internet routing protocol. E the device floods asexternallsas as described in rfc 2740. Ospf version 3, which is described in rfc 2740, supports ipv6. This is true as long as the ospfv3 implementation reports one route per prefix to its users ip and other routing protocols. Rfc 1584 provides extensions to ospf for the support of ip multicast traffic. This document describes means and mechanisms to provide authenticationconfidentiality to ospfv3 using an ipv6 authentication headerencapsulating security payload. Mc the device forwards multicast packets as described in rfc 1586. Download as ppt, pdf, txt or read online from scribd. Lsa types for ospfv3 communication among ospfv3 areas is provided by means of link state advertisements lsas. Junos os substantially supports the following rfcs and internet drafts, which define. Static routing with ipv6 is used and configured in the same way as with.
Ospfv3 functions similarly to ospf version 2 ospfv2, with several enhancements. Mpbgp4 rfc 2858 and rfc 2545 cisco ios supports all of them pick one meeting your objectives. Ospfv3 share many key concepts including their basic. Most of the functionality of ospfv2 carries over into ospfv3, but there are. However, its not only an extension of ospfv2 for new address family, but also a new improved version of the protocol itself.
Ospfv3 rfc 2740 ipv6 multicast routing pim sm v6 rfc 2362 ipv4 suite ipv4 rfc 791, 903, 951, 1293, 1519 tcp rfc 793, 896 telnet server rfc 854, 855, 856, 858 tftp client rfc 50 icmp rfc 2521, 1191, 1788, 792 arp rfc 826 udp rfc 768 message digest algorithm rfc 21 radius client rfc 28 dhcp client rfc 21, 22 dhcp server rfc 21. Acx series,ex3200,ex4200,ex8200,m series,mx series,t series,ptx series. According to the ospfv3 rfc n2, the virtual neighbors ip address is set to the first prefix with the labit set from the list of prefixes in intraareaprefixlink state. Ospfv3 adds support for ipv6 in the open shortest path first ospf routing. View and download h3c s5500ei configuration manual online. Routing in ipv6 as in ipv4, ipv6 has two families of routing protocols.
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