Mrib/M6Rib Dynamic Shared Memory Support - Cisco Nexus 7000 Series Configuration Manual

Overview
• The unicast and multicast FIB process manages the Layer 3 hardware forwarding path. It runs on both

MRIB/M6RIB Dynamic Shared Memory Support

The Cisco NX-OS IPv4 Multicast Routing Information Base and IPv6 Multicast Routing Information Base
(MRIB/M6RIB) dynamic shared memory support feature supports dynamic shared memory in a virtual device
context (VDC). The MRIB/M6RIB dynamic shared memory feature changes the shared memory dynamically
based on the number of routes that are added or removed from the MRIB/M6RIB. Instead of a static allocation
of the entire configured memory for the multicast routes, the shared memory for MRIB/M6RIB dynamically
adds up or is removed based on the increase or decrease, respectively, in the number of routes.
This feature also ensures that information on the shared memory is accessible and readable by the MRIB/M6RIB
clients during a dynamic change in the shared memory. The MRIB/M6RIB dynamic shared memory feature
also supports device switchover (from active to standy state and vice-versa) when the shared memory increases
or decreases.
the supervisor and the modules.
Figure 8: Cisco NX-OS Multicast Software Architecture
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
MRIB/M6RIB Dynamic Shared Memory Support
13