Cisco NCS 5500 Series

CHAPTER 4
Implementing and Monitoring RIB
Routing Information Base (RIB) is a distributed collection of information about routing connectivity among
all nodes of a network. Each router maintains a RIB containing the routing information for that router. RIB
stores the best routes from all routing protocols that are running on the system.
Each routing protocol selects its own set of best routes and installs those routes and their attributes in RIB.
RIB stores these routes and selects the best ones from among all routing protocols. Those routes are downloaded
to the line cards for use in forwarding packets. The acronym RIB is used both to refer to RIB processes and
the collection of route data contained within RIB. Within a protocol, routes are selected based on the metrics
in use by that protocol. A protocol downloads its best routes (lowest or tied metric) to RIB. RIB selects the
best overall route by comparing the administrative distance of the associated protocol.
This module describes how to implement and monitor RIB on your network.
VPNv4, VPNv6 and VPN routing and forwarding (VRF) address families will be supported in a future release.
Note
• Verify RIB Configuration Using Routing Table, on page 115
• Verify Networking and Routing Problems, on page 116
• Disable RIB Next-hop Dampening, on page 118
• Enable RCC and LCC On-demand Scan, on page 119
• Enable RCC and LCC Background Scan, on page 120
• References for RIB, on page 122
Verify RIB Configuration Using Routing Table
Perform this task to verify the RIB configuration to ensure that RIB is running on the RP and functioning
properly by checking the routing table summary and details.
SUMMARY STEPS
1. show route [ vrf { vrf-name | all }] [ afi-all | ipv4 | ipv6 ] [ unicast | safi-all ] summary [ detail
] [ standby ]
2. show route [ vrf { vrf-name | all }] [ afi-all | ipv4 | ipv6 ] [ unicast | safi-all ] [ protocol [ instance
] | ip-address mask ] [ standby ] [ detail ]
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
115