Protocol-Independent Multicast (PIM) is a routing protocol like RIP or OSPF. It was designed to allow multicast routing without needing to rely on other specific unicast routing protocols. There are two main modes in which PIM will operate in two main modes: Dense mode and Sparse mode. It is possible for a router to manage …
A multicast route to a destination is used by some multicast routing protocols to create the information that is used to forward multicast data from hosts on the destination network of the route (known as reverse path forwarding).Examples of multicast routing protocols include: Multicast Open Shortest Path First (MOSPF), Distance Vector –Type 6 (Multicast OSPF) - Spooky. See RFC1584. –Type 7 (NSSA AS External Link Advertisements) – Sent by ASBR’s that are part of an NSSA (see ‘Stub Area’). Stub Area – A stub area is an area that only requires one path, rather than an optimal path. Mar 26, 2020 · CCDA FAQ: OSPF, BGP, Route Manipulation, and IP Multicast Q1. True or false: A router needs to have all its interfaces in Area 0 to be considered an OSPF backbone router. Answer: False. A router with one or more interfaces in Area 0 is considered an OSPF backbone router. Q2. True or false: OSPF IS-IS […] Dec 28, 2019 · Hello packets, LSU packets, and LSAck packets are usually transmitted in multicast mode. 224.0.0.5 is an IP multicast address reserved for an OSPF device. 224.0.0.6 is an IP multicast address reserved for an OSPF DR or backup designated router (BDR). DD and LSR packets are transmitted in unicast mode. Non-Broadcast Multi-Access (NBMA) Multicast addresses in IPv6 are similar to multicast addresses in IPv4. They are used to communicate with dynamic groupings of hosts, for example all routers on the link (one-to-many distribution). Here is a graphical representation of the IPv6 multicast packet: IPv6 multicast addresses start with FF00::/8. After the first 8 bits there are 4
OSPF Multicast Address. dppagc Member Posts: 293. January 2016 in CCNP. 224.0.0.5 is the All OSPF Routers Address (in that case does it mean the DR and DROTHER routers)?
M Series,T Series,MX Series,PTX Series. Protocol Independent Multicast (PIM), in conjunction with multitopology routing extensions to OSPF (multitopology OSPF) and BGP, can direct multicast traffic over particular paths based on traffic characteristics. The all-Distance Vector Multicast Routing Protocol (DVMRP) routers address. Used to reach all DVMRP multicast routers on the same link. FF02::5: OSPF IPv6 multicast address. (Remember, in IPv4, OSPF multicast address was 224.0.0.5) FF02::6 : OSPFv3 Designated Router's and Non-Designated Router's IPv6 multicast address. OSPF neighbor keeps by the hello message, in NBMA type network, hello packets send by unicast, broadcast network type hello packets send to multicast group .suspect the multicast packets ware suppressed. Try to configure the unknown multicast packets transparent in service port and ONT , problem still not solved. Protocol-Independent Multicast (PIM) is a routing protocol like RIP or OSPF. It was designed to allow multicast routing without needing to rely on other specific unicast routing protocols. There are two main modes in which PIM will operate in two main modes: Dense mode and Sparse mode. It is possible for a router to manage …
to enable end-to-end multicast capabilities. In this paper, we investigate a complete multicast routing architecture consisting of IGMP [6] for multicast group membership management in a LAN, OSPF [4] for unicast routing, and PIM sparse-mode [8] and PIM dense-mode [7] for multicast routing. OSPF is chosen because of its rapid fault recovery
If you ever tried redistribution with OSPF you might have seen O E1 or E2 entries. Those are the external prefixes and our type 5 LSAs. What about OSPF LSA type 6? Type 6 multicast ospf LSA I can skip because it’s not being used. It’s not even supported by Cisco. We use PIM (Protocol Independent Multicast) for multicast configurations. A multicast packet's path is then calculated by building a pruned shortest-path tree rooted at the packet's IP source. These trees are built on demand, and the results of the calculation are cached for use by subsequent packets. The multicast extensions are built on top of OSPF version 2. OSPF packets are encapsulated directly in IP with the protocol field set to 89. The destination IP address in OSPF depends on the network type. OSPF uses two IP multicast addresses on broadcast and point-to-point networks: 225.0.0.5 for all OSPF routers and 224.0.0.6 for all DR/BDR (designated router/backup designated router) routers. Apr 19, 2016 · Cisco route and switch technologies cover a wide range of topics, one of which is Multicast Routing. However, it's interesting that the topic of multicasting seems to receive relatively little Jan 26, 2018 · Multicast stub routing does not prevent the configuration of other Interior Gateway Protocols (IGPs) that do not support stub routing, such as Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Intermediate System-to-Intermediate System (IS-IS) to bypass this restriction. IPv6 Multicast Address Space Registry Last Updated 2020-01-29 Expert(s) Stig Venaas Note IPv6 multicast addresses are defined in "IP Version 6 Addressing Architecture" [].This defines fixed scope and variable scope multicast addresses. The Multicast Extensions to OSPF (MOSPF) defined in RFC 1584 are built on top of Open Shortest Path First (OSPF) Version 2 (RFC 1583). MOSPF uses the group membership information obtained through IGMP and with the help of OSPF database builds multicast delivery trees.