Interfaces and Hardware Component Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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Interfaces and Hardware Component Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

Ethernet interface configuration

Updated: July 31, 2026

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Describes the scope of Ethernet interface configuration on Cisco 8000 Series Routers, including the distributed 10-Gigabit, 25-Gigabit, 40-Gigabit, 100-Gigabit, and 400-Gigabit Ethernet architectures and features that interconnect the router with core routers, edge routers, and Layer 2 and Layer 3 switches in POPs.

This module describes the configuration of Ethernet interfaces.

The distributed 10-Gigabit, 25-Gigabit Ethernet, 40-Gigabit, 100-Gigabit Ethernet, 400-Gigabit Ethernet architecture and features deliver network scalability and performance, while enabling service providers to offer high-density, high-bandwidth networking solutions designed to interconnect the router with other systems in POPs, including core and edge routers, Layer 2 switches and Layer 3 switches.

Table 1. Feature history table

Feature Name

Release Information

Feature Description

Introduction of IP MTU

 26.1.1

Introduced in this release on: Centralized Systems (8400 [ASIC:K100]) )(select variants only*)

*This feature is now supported on Cisco 8404-SYS-D routers.

Introduction of IP MTU

 25.4.1

Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*)

*This feature is now supported on:

  • 8011-32Y8L2H2FH

  • 8011-12G12X4Y-A/D

Introduction of IP MTU

25.1.1

Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*)

*This feature is supported on Cisco 8011-4G24Y4H-I routers.

Introduction of IP MTU

24.4.1

Introduced in this release on: Fixed Systems (8200 [ASIC: P100], 8700 [ASIC: P100, K100])(select variants only*); Modular Systems (8800 [LC ASIC: P100])(select variants only*)

*The IP MTU functionality is now supported on:

  • 8212-48FH-M

  • 8711-32FH-M

  • 8712-MOD-M

  • 88-LC1-12TH24FH-E

  • 88-LC1-36EH

  • 88-LC1-52Y8H-EM

Introduction of IP MTU on Q200-based Systems

7.5.2

You can configure IP MTU for IPv4 and IPv6 on a Layer 3 interface. Depending on your specific network requirements, this ability to specify IP MTU settings helps optimize router data transmission.

Use the show ipv4/ipv6 interfaces command to view the IP MTU configurations.
Tip

You can programmatically configure and manage the Ethernet interfaces using openconfig-if-ethernet.yang and openconfig-interfaces.yang OpenConfig data models. To get started with using data models, see Programmability Configuration Guide for Cisco 8000 Series Routers.