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The ZebOS® ARS includes support for both IPv4 and IPv6 multicast protocol modules. This includes support for Protocol Independent Multicast-Sparse Mode (PIM-SM and PIM-SMv6) and Protocol Independent Multicast-Dense Mode Virtual Routing logically subdivides a physical router into multiple virtual routers and allows each virtual router to execute separate instances of the routing protocol software and network management software (for example, SNMP or the CLI). Each virtual router can be independently monitored and managed by the user. Many sources refer to virtual routers in terms of their application within virtual private networks. This design interprets the VPN implementation to be a specific application of the overall virtual routing design. As a result, the VPN approach is considered to be an add-on feature of virtual routing.
The ARS offers optional Virtual Routing (VR) support for both the IPv4 and IPv6 routing protocol modules. It provides support for multiple Routing Information Bases (RIBs) and multiple Forwarding Information Bases (FIBs) per a physical router. Each VR consists of an OSPFv2, BGP- 4(+), or RIP Protocol, each with its own Route Information Base (RIB) and Forwarding Information Base (FIB).
Example of Virtual Routing
Figure 3: Example of Virtual Routing
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