Rib Statistics; Ipv6 Provider Edge Ipv6 And Ipv6 Vpn Provider Edge Transport Over Mpls; Rib Quarantining - Cisco ASR 9000 Series Routing Configuration Manual

RIB Statistics

into the multicast-unicast RIB table. Multicast protocols then use the information to build multicast routes
(which in turn are stored in the MRIB). See the multicast documentation for more information on using and
configuring multicast.
RIB processes ipv4_rib and ipv6_rib run on the RP card. If process placement functionality is available and
supported by multiple RPs in the router, RIB processes can be placed on any available node.
RIB Statistics
RIB supports statistics for messages (requests) flowing between the RIB and its clients. Protocol clients send
messages to the RIB (for example, route add, route delete, and next-hop register, and so on). RIB also sends
messages (for example, redistribute routes, advertisements, next-hop notifications, and so on). These statistics
are used to gather information about what messages have been sent and the number of messages that have
been sent. These statistics provide counters for the various messages that flow between the RIB server and
its clients. The statistics are displayed using the show rib statistics command.
RIB maintains counters for all requests sent from a client including:
• Route operations
• Table registrations
• Next-hop registrations
• Redistribution registrations
• Attribute registrations
• Synchronization completion
RIB also maintains counters for all requests sent by the RIB. The configuration will disable the RIB next-hop
dampening feature. As a result, RIB notifies client immediately when a next hop that client registered for is
resolved or unresolved.
RIB also maintains the results of the requests.

IPv6 Provider Edge IPv6 and IPv6 VPN Provider Edge Transport over MPLS

IPv6 Provider Edge (6PE) and IPv6 VPN Provider Edge (6VPE) leverages the existing Multiprotocol Label
Switching (MPLS) IPv4 core infrastructure for IPv6 transport. 6PE and 6VPE enables IPv6 sites to communicate
with each other over an MPLS IPv4 core network using MPLS label switched paths (LSPs).
RIB supports 6PE and 6VPE by providing 6VPE next hops. The next-hop information is stored in an opaque
database in RIB, which is populated by protocol clients with data to be sent to the Forwarding Information
Base (FIB).
For detailed information about configuring 6PE and 6VPE over MPLS, see Cisco ASR 9000 Series Aggregation
Services Router MPLS Configuration Guide.

RIB Quarantining

RIB quarantining solves the problem in the interaction between routing protocols and the RIB. The problem
is a persistent oscillation between the RIB and routing protocols that occurs when a route is continuously
inserted and then withdrawn from the RIB, resulting in a spike in CPU use until the problem is resolved. If
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Implementing and Monitoring RIB