IP Addresses and Services Configuration Guide for Cisco 8000 Series Routers, IOS XR Releases

FIB object-ID diagnostics

Updated: September 8, 2026

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Explains how FIB object-ID diagnostics expose allocated identifiers in the default and encapsulation-ID tables for targeted forwarding-object troubleshooting and inspection.

Forwarding Information Base (FIB) object-ID diagnostics are command outputs that

list all allocated object IDs in the default table
list all allocated object IDs in the encap-id table, and
display a selected object ID from either table.

Table 1. Feature History Table
Feature name	Release Information	Feature Description
Enhance FIB debuggability	Release 25.3.1	You can now enhance the debuggability of FIB objects by requesting information like allocated object-ids within the required table. This feature introduces these changes: CLI: show cef global object-id summary show cef global object-id table

View FIB object IDs

Inspect the object IDs allocated within the default or encap-id FIB table.

Procedure

Select the required diagnostic view.

Use show cef global object-id summary to display an allocation summary.
Use show cef global object-id table to display table-level object-ID information.

The command output displays object-ID allocation information for the selected FIB scope.

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