Product Overview

Green Hills Software multicast routing protocol comes with all of the basic functionality necessary for multicast routing. The primary items included with each multicast routing protocol are the MBR, MRT, IGMP (for use with IPv4), and MLD
(for use with IPv6).

The MBR (Multicast Border Router) functionality is used to give ownership of different interfaces to different multicast routing protocols. This is necessary so that more than one protocol can be run on the box at the same time.

The MRT (Multicast Routing Table) maintains the state associated with sources and groups, which is subsequently fed to the forwarding engine.

IGMP (Internet Group Management Protocol) is a basic building block for multicast routing that allows hosts to report their group memberships to IPv4 routers.

Similarly, MLD (Multicast Listener Discovery) allows hosts to report their group memberships to IPv6 routers. In addition to these major features, Green Hills GateD supports a number of minor features such as static joins, which allow the user to defi ne a persistent group membership.

Used as the foundation for the MBone, DVMRP is the multicast equivalent of RIP, and Green Hills implements the latest version – version 3. Designed in the early days of multicast research, DVMRP is largely considered a legacy protocol today and is quickly being replaced by PIM. As with most protocols, Green Hills is very active in the development of the multicast standards. Green Hills GateD PIM-DM module supports PIM-DM version 2.

The PIM-SM module supports PIM-SM version 2. The IPv4 PIM-SSM module utilizes IGMPv3 to support source-specific multicast. Likewise, the IPv6 PIM-SSM module utilizes MLDv2 to support source-specific multicast.

The last of the five protocols, MSDP, is the inter-domain protocol for operation between PIM domains. When deployed in conjunction with PIM-DM, PIM-SM, or PIM-SSM, MSDP completes the picture, letting sources and groups discover each other across administrative boundaries.

As with all Green Hills routing products, the multicast family of protocols strikes the perfect balance between richness of features and the safety of deployed code that is working in the Internet today. The original GateD multicast routing protocols have been shipping since 1997. And like the unicast routing protocols, the multicast protocols are fully tested for conformance and interoperability.

Additional Green Hills Software GateD Products

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• INTEGRITY Secure Virtualization Technology
• GHNet IPv4/v6 host and routing stack
• SSH, SSL/TLS, IPSec/IKE, crypto algorithms
• Telnet, RADIUS, SNTP, DNS, DHCP
• Wireless Supplicant with security and CCX