12. MOSPF Implementation
The Multicast Extensions to OSPF, or MOSPF, enable a router to forward IP multicast datagrams. The MOSPF implementation calculates multicast routing table entries and installs them into the system’s kernel through the system interface routine OspfSysCalls::add_mcache() (see Section 4.2). The system kernel installs multicast routing table entries on demand. When it receives a multicast datagram and has no matching multicast routing table entry, the kernel asks the MOSPF implementation to install the appropriate routing table entry, calling the OSPF entry point OSPF:: mclookup() (see Section 4.3). For more information on MOSPF, consult Chapter 10 of [67] and the MOSPF protocol specification [66].
This chapter details how ...
Get OSPF Complete Implementation now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
