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

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

24 bit bincode support for egress object group ACLs

Updated: August 12, 2026

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This topic describes 24 bit bincode support for egress object group ACLs on the Cisco 8000 Series Router, which increases the result key size to support complex access lists that exceed the 14 bit limit.

24 bit bincode support is an Object Group (OG) or hybrid ACL functionality that

  • increases the result key size for egress Object Group Access Control Lists (OG-ACLs),

  • optimizes hardware programming for complex access lists that previously exceeded the 14 bit limit,

  • provides configurable modes for ingress, egress, or both directions, and

  • enables the OG compression ID extension in the Ternary Content Addressable Memory (TCAM).

Benefits of 24 bit bincode support for egress OG ACL

These are the benefits of 24 bit bincode support for egress OG ACL:

  • The feature increases the result key size to 24 bits.

  • It prevents programming failures caused by hardware key size limits.

  • It allows the router to store large address and port ranges efficiently.

Configuration guidelines for 24 bit egress object group ACL support

These guidelines apply for 24 bit egress object group ACL support:

  • This feature is enabled on these systems:

    • Cisco Silicon One P100 ASIC-based systems

    • Cisco Silicon One K100 ASIC-based systems

    • Cisco Silicon One A100 ASIC-based systems

    • Cisco Silicon One P200 ASIC-based systems

  • Ensure the router runs IOS XR Release 26.2.1 or later.

  • Reload the router and the line cards to enable this feature after you've configured it.

Configure 24 bit support for egress object group ACL

This section includes configuration steps for 24 bit support for egress object group ACL.

Procedure

  1. Enter the global configuration mode.

    Example:

    Router# configure

  2. Enter the command to enable the bincode extension for the egress direction.

    Example:

    Router# hw-module profile tcam format og-compr-id-extension egress

  3. Save the changes.

    Example:

    Router# commit

  4. Reload the router or line cards to activate the new hardware profile.

    Example:

    Router# reload