Release Notes for Cisco 8000 Series Routers, IOS XR Release 25.2.1

Overview

Cisco IOS XR Release 25.2.1 introduces new features and hardware for the Cisco 8000 Series Routers. Key features include disk encryption, advanced telemetry, DDoS protection, enhanced QoS statistics, and updated multicast and routing capabilities. The release also features a new hardware, Cisco 400G QSFP-DD Ultra Long Haul Coherent Optics.

For more details on the Cisco IOS XR release model and associated support, see Software Lifecycle Support Statement - IOS XR.

New software features

Table 1. New software features for Cisco 8000 Series Routers, Release 25.2.1

Product Impact Feature Description
Setup and Upgrade Software Reliability Disk encryption Introduced in this release on: Fixed Systems (8200 [ASIC: Q100, Q200, P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])
To ensure data security even when a router leaves the customer's premises, Cisco provides Linux Unified Key Setup (LUKS) with AES-XTS encryption, robust encryption mechanisms, with keys securely stored in the hardware Trusted Authentication Module (TAM). This encryption capability, enabled by default across all router nodes and immutable, operates seamlessly in the background, allowing users to interact with the filesystem without altering their experience, thereby providing continuous and reliable data protection.
The disk encryption feature impacts the IOS XR software upgrade process. For more information, refer the Cisco 8000 IOS XR Software - Upgrade/Downgrade docs for IOS XR Release 25.2.1, in the Cisco Software Download portal.
Telemetry Software Reliability Stream telemetry data for IPv4 and IPv6 data on interfaces Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q200, P100])
Enhance network reliability and resource optimization for efficient data collection and analysis by monitoring interface performance and operational status across platforms. This ensures consistent management, proactive troubleshooting, and optimization in multi-vendor environments by using openconfig-interfaces.yang data models. This can be achieved by enabling telemetry to configure specific sensor paths for tracking interface states.
API Experience Component change notification Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q200, P100])
Enhance operational efficiency with real-time, event-driven notifications that offer actionable insights and seamless adaptation to dynamic inventory changes. This feature ensures awareness of system component changes and outperforms traditional MDT capabilities, which focus on telemetry data rather than change-driven alerts.
Application Hosting Upgrade Cisco Secure DDoS Edge Protection Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100])(select variants only*); Centralized Systems (8600 [ASIC:Q200]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])(select variants only*)
Enable the router to detect DDoS attacks targeting MPLS traffic using DDoS edge protection. The router analyzes MPLS flows to identify malicious traffic patterns, ensuring the availability and performance of services traversing MPLS networks.
Modular QoS Ease of Use Increased accuracy of guaranteed service rate statistics for traffic shaping Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100]); Centralized Systems (8600 [ASIC: Q200], 8400 [ASIC: K100]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])
View accurate guaranteed service rates for traffic shaping policies applied on a main interface. This enhancement is based on the actual programmed Queue Max. Bandwidth (BW) value retrieved from the Network Processing Unit (NPU), enabling the system to accurately calculate and display the guaranteed service rates for traffic shaping.
Ease of Use Enhanced PFC pause duration monitoring Introduced in this release on: Modular Systems (8800 [LC ASIC: Q200])
This feature improves network congestion analysis by providing granular visibility into Priority Flow Control (PFC) pause durations. It introduces the ability to monitor both transmit (TX) and receive (RX) pause durations in microseconds, allowing for precise identification of congestion patterns. Previously, only pause percentages were available, but this enhancement provides a more detailed and accurate understanding of PFC pause events.
NetFlow and sFlow Software Reliability Mirror and stream dropped traps using SPAN and sFlow Introduced in this release on: Modular Systems (8800 [LC ASIC: P100])
The forwarding dropped trap feature enables the mirroring and forwarding of system-generated notifications, triggered when packets are dropped during the forwarding process, to an sFlow collector. This provides valuable insights into potential network issues and enhances network traffic monitoring and analysis by leveraging SPAN and sFlow.
Software Reliability Simultaneous L2 and L3 flow monitoring using IPFIX Introduced in this release on: Fixed Systems (8000 [ASIC: Q200] (select variants only*), 8200 [ASIC: Q200] (select variants only*), 8200 [ASIC: Q200] (select variants only*); Modular Systems (8800 [LC ASIC: Q200]) (select variants only*)
This feature introduces support for simultaneous L2 and L3 flow monitoring. You can configure IP Flow Information Export (IPFIX) to actively monitor and record end-to-end L2 and L3 flow information elements from network devices. Previously, you could only monitor L2 or L3 flow.
*This feature is supported on:
• 8201-32FH
• 88-LC0-34H14FH
• 88-LC0-36FH
• 88-LC0-36FH-M
System Management Hardware Reliability Core dump folder limit Introduced in this release on: Fixed Systems (8200, 8700); Centralized Systems (8600); Modular Systems (8800 [LC ASIC: Q100, Q200, P100, K100])
Set configurable disk storage limits between 20% and 50% of total space to prevent excessive core dumps during repeated crashes. This is complemented by a new core dump folder limit, which restricts the number of retained coreinfo files to a maximum of 50. Together, these features ensure better disk management by controlling storage consumption and preserving space for critical system operations. Additionally, periodic automatic cleanup every 15 minutes helps maintain optimal disk usage, enhancing overall system reliability and performance.
Interface and Hardware Components Software Reliability Unique capture for SPAN-to-File Introduced in this release on: Fixed Systems (8200 [ASIC: Q200,P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])
Enhance the SPAN-to-File functionality by allowing capture of only a single, unique packet for each punt reason or interface. This prevents interesting packets from being overshadowed by repeated packets in the analyzed flow, ensuring that diverse and relevant packets are retained for analysis.
Software Reliability 2x200G DACs with 2x200 Breakout Introduced in this release on: Fixed Systems (8200 [ASIC: Q200](select variants only*), Modular Systems (8800 [LC ASIC: Q200]) (select variants only*)
This feature enables support for configuring 2x200G DAC (Direct Attach Copper) cables with a 2x200G breakout. It addresses the issue where certain 2x200G DAC cables are incorrectly detected as 400G cables and allows explicit configuration of the 2x200G breakout using the CLI (Command-Line Interface).
*The feature is supported on:
• 88-LC0-36FH
• 88-LC0-36FH-M
• 8201-32FH
• 8202-32FH-M
Software Reliability Integrated Routing and Bridging with Bridge-Group Virtual Interface Introduced in this release on: Fixed Systems (8200 [ASIC: P100]); Fixed Systems (8700 [ASIC: P100]); Modular Systems (8800 [LC ASIC: P100])
Integrated Routing and Bridging (IRB) provides the ability to exchange traffic between bridging services on a router and a routed interface using a Bridge-Group Virtual Interface (BVI). IRB over BVI enables seamless communication between Layer 2 bridging and Layer 3 routing by using BVI as a logical interface.
*This feature is supported on:
• 8212-48FH-M
• 8711-32FH-M
• 88-LC1-36EH
Ease of use Local SPAN Introduced in this release on: Modular Systems (8800 [LC ASIC: P100])(select variants only*)
Local SPAN allows monitoring network traffic on a single switch by copying traffic from one or more source ports or VLANs to a destination port for analysis. This process occurs entirely within the same device, ensuring that both source and destination ports are located on it. Monitor and analyze traffic without affecting the normal operation of the network.
*This feature is now supported on:
• 88-LC1-36EH
• 88-LC1-12TH24FH-E
Routing Ease of Setup IS-IS static neighbor Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])
IS-IS static neighbor allows the advertisement of an IS-IS link without forming an actual IS-IS adjacency. This feature is useful when a link is required in the topology for the controller, but IS-IS is not actively running on the link.
MPLS Software Reliability Decoupled Mode for L2VPN and EVPN VPWS services Introduced in this release on: Fixed Systems (8200, 8700); Centralized Systems (8600); Modular Systems (8800 [LC ASIC: Q100, Q200, P100, K100])
Decoupled mode improves fault tolerance by allowing the PE router to maintain the PW in an active state independently of the AC status. Unlike the traditional coupled mode, which requires both AC and PW to be active for traffic flow, decoupled mode ensures uninterrupted PW traffic even during AC failures.
EVPN Software Reliability EVPN and L3VPN using Route Type-5 over BGP-LU with SR Introduced in this release on: Modular Systems (8800 [LC ASIC: P100]) (select variants only*)
Enhance network infrastructure with an advanced architecture that seamlessly integrates EVPN, L3VPN, and Route Type-5 over BGP-LU over segment routing, offering a scalable, flexible, and resilient solution for service providers and large enterprises. This design combines the versatility of EVPN for Layer 2 services with the robust scalability of L3VPN, ensuring seamless IP connectivity across multiple sites using Route Type-5.
* This is supported on 88-LC1-12TH24FH-E and 88-LC1-52Y8H-EM.
Software Reliability EVPN bridging and E-Line services over BGP-LU underlay with SR Introduced in this release on: Fixed Systems (8200 [ASIC: P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Modular Systems (8800 [LC ASIC: P100])
Configure end-to-end services between data centers using the BGP Labeled Unicast (BGP-LU) underlay with segment routing. The feature supports EVPN E-LAN and E-Line services and enables load balancing across transport, BGP-LU, and service levels using segment routing.
Multicast Ease of Use Multicast IRB Introduced in this release on: Fixed Systems (8200 [ASIC: P100], 8700 [ASIC: P100]); Modular Systems (8800 [LC ASIC: P100])
Multicast IRB enables the routing of multicast packets into and out of a bridge domain through a BVI. The feature supports native multicast for MVPN profiles such as 0, 1, 3, 5, 6, 11, 14, 17, 19, 21, 22, and 25. For more information about the supported MVPN profiles, see mVPN Profiles within Cisco IOS XR.
Segment Routing Ease of Use Dual-stack with SRv6 unicast and IPv4 multicast core Introduced in this release on: Fixed Systems (8700 [ASIC: K100]) (select variants only*)
The feature introduces dual-stack support with SRv6 for unicast traffic and IPv4 for multicast communication. The dual-stack simplifies the routing process by combining the advantages of both IPv4 and SRv6 protocols and facilitates smoother interoperability between the two protocols. The dual-stack enables efficient unicast communication through SRv6 by allowing precise control over the path that a packet takes through a network and streamlines the network routing, while using the deployment support of IPv4 for multicast traffic.
*This feature is supported on 8712-MOD-M.
API Experience gRPC based North Bound API for BGP-LS objects Introduced in this release on: Fixed Systems (8200 [ASIC: Q200, P100], 8700 [ASIC: P100, K100], 8010 [ASIC: A100]); Centralized Systems (8600 [ASIC: Q200]); Modular Systems (8800 [LC ASIC: Q100, Q200, P100])
This gRPC-based API exports BGP-LS topology objects, which include Nodes, Links, IPv4 and IPv6 Prefixes, SRv6 SIDs, and SR Policy Candidate Paths. The API is designed to provide real-time updates to external controllers and applications, enabling them to perform tasks such as re-optimization, service placement, and network visualization.
For more information, see the Cisco Crosswork Optimization Engine User Guides.
System Security Ease of Use MACsec encryption on layer 3 subinterfaces Introduced in this release on: Fixed Systems (8200 [ASIC: P100]) (select variants only*)
Configure MACsec policies on Layer 3 subinterfaces, allowing greater flexibility to secure different L3 subinterfaces under the same physical interface. This is achieved by enabling the router to keep VLAN tags unencrypted, allowing L3 subinterfaces to function as MACsec endpoints. Applying MACsec policies at this level enhances network security by adding an extra layer of protection for communication between subnets.
*This feature support is now extended to 8212-48FH-M.
Ease of Use Power-on self-test KAT with MACsec Introduced in this release on: Fixed Systems (8200 [ASIC: P100]) (select variants only*)
Integration of Known Answer Tests (KAT) with MACsec on Cisco 8606 Series Routers, supporting secure communication, operational reliability, and stringent security standards for government and enterprise networks. This integration ensures cryptographic integrity and enhances security through algorithms like SHA and DES, Secure Hash Algorithm (SHA) and Data Encryption Standard (DES), aligning with Federal Information Processing Standards (FIPS).
*This feature support is now extended to 8212-48FH-M.
Software Reliability Enhanced hash rotation range Introduced in this release on: Introduced in this release on: Fixed Systems (8200 [ASIC: Q200]; Centralized Systems (8600 [ASIC:Q200]); Modular Systems (8800 [LC ASIC: Q200])
Increased configurable hash rotate counts from 36 to 144 providing each Network Processing Unit (NPU) with the flexibility to operate using a distinct hash rotation value within this expanded spectrum. The increase in hash rotation range improves traffic load balancing and reduces polarization by enabling unique values per NPU, which is especially beneficial in large-scale or high-density router deployments. This capability allows better performance, scalability, and resource utilization across the network.

New hardware

Table 2. New hardware for Cisco 8000 Series Routers, Release 25.2.1

Hardware Description
Optics This release launches the following new optics on selective hardware within the product portfolio. For details, refer to the Transceiver Module Group (TMG) Compatibility Matrix.
Cisco 400G QSFP-DD Ultra Long Haul Coherent Optics
DP04QSDD-ULH

Changes in behavior

Open issues

Table 3. Open issues for Cisco 8000 Series Routers, Release 25.2.1

Bug ID Description
CSCwo90316 SRv6 traffic not converged within expected post BGP PIC down rollback trigger.
CSCwi89574 In a fully populated Cisco 8800 router, the snmp OIDs - pfc MIB is slow.
CSCwn52365 BFD sessions flapped on BOB interfaces with ifmgr process restart.
CSCwj32566 Multicast shaper not working for P100 and K100 ASIC based line cards and routers

Known issues

There are no known issues in this release.

Compatibility

Compatibility Matrix for EPNM and Crosswork with Cisco IOS XR Software

The compatibility matrix lists the version of EPNM and Crosswork that are supported with Cisco IOS XR software in this release.

Table 4. Compatibility matrix for Cisco 8000 Series Routers, Release 25.2.1

Cisco IOS XR Crosswork EPNM
Release 25.2.1 Crosswork Optimization Engine 6.0 Evolved Programmable Network Manager 7.1.1

Upgrade and downgrade paths

To view all supported Cisco IOS XR Software upgrades from the current version according to the support data installed on the running system, enter the show install upgrade-matrix running command:

Router# show install upgrade-matrix running
Matrix: XR version: 25.2.1, File version: 1.0, Version: N/A
The upgrade matrix indicates that the following system upgrades are supported from the current XR version:
From
To
Restrictions
25.2.1
24.1.2
Target fixes; Caveats; Replace performed via reimage
25.2.1
24.2.11
Target fixes; Caveats; Replace performed via reimage
25.2.1
24.2.2
Target fixes; Caveats; Replace performed via reimage
25.2.1
24.2.20
Caveats; Replace performed via reimage
25.2.1
24.2.21
Caveats; Replace performed via reimage
25.2.1
24.3.1
Target fixes; Caveats; Replace performed via reimage
25.2.1
24.3.2
Target fixes; Caveats; Replace performed via reimage
25.2.1
24.3.20
Caveats; Replace performed via reimage
25.2.1
24.4.1
Caveats; Replace performed via reimage
25.2.1
24.4.2
Caveats; Replace performed via reimage
25.2.1
25.1.1
Caveats; Replace performed via reimage
25.2.1
25.1.2
Caveats; Replace performed via reimage
25.2.1
7.10.2
Target fixes; Caveats; Replace performed via reimage
25.2.1
7.11.2
Target fixes; Caveats; Replace performed via reimage
25.2.1
7.11.21
Target fixes; Caveats; Replace performed via reimage

Add the from and to versions to the end of the CLI command, for data on versions with additional restrictions.

For example, to display restrictions for the 25.2.1->24.1.2 upgrade, use show install upgrade-matrix running 25.2.1 24.1.2

Software version

Log in to the router and enter the show version command:

RP/0/RP0/CPU0% show version
Cisco IOS XR Software, Version 25.2.1 LNT
Copyright (c) 2013-2025 by Cisco Systems, Inc.

Supported hardware

Table 5. Supported hardware for Cisco 8010 Series Routers

Part Number Description Support Initially Provided in IOS XR Release
Cisco 8010 Series Routers - Chassis
8011-4G24Y4H-1 Cisco 8010 1 RU Fixed System - 4 QSFP28 100GbE, 24 SFP28 25GbE, and 4 RJ-45 100MbE Release 25.1.1
Cisco 8010 Series Routers - Power Supply Unit (PSU)
PWR-400-AC Cisco 400W AC Power Module Release 25.1.1
PWR-400-DC Cisco 400W DC Power Module Release 25.1.1

Table 6. Supported hardware for Cisco 8200 Series Routers

Part Number Description Support Initially Provided in IOS XR Release
Cisco 8200 Series Routers - Chassis
8201-SYS Cisco 8200 1 RU Fixed System - 24 QSFP56-DD 400GbE and 12 QSFP28 100GbE Release 7.0.12
8202-SYS Cisco 8200 2 RU Fixed System - 12 QSFP56-DD 400GbE and 60 QSFP28 100GbE Release 7.3.1
8201-32FH Cisco 8200 1 RU Fixed System - 32 QSFP56-DD 400GbE Release 7.3.15
8201-24H8FH Cisco 8200 1 RU Fixed System - 8 QSFP56-DD 400GbE and 24 QSFP28 100GbE Release 7.7.1
8202-32FH-M Cisco 8200 2 RU Fixed System - 32 QSFP56-DD 400GbE with MACsec Release 7.5.2
8212-48FH-M Cisco 8200 2 RU Fixed System - 24 QSFP-DD 800G or 48 QSFP56-DD 400GbE with MACsec Release 24.3.1
Cisco 8200 Series Routers - Power Supply Unit (PSU)
PSU1.4KW-ACPI Cisco 1.4KW AC Power Module with Port-side Air Intake Release 7.0.12
PSU1.4KW-ACPE Cisco 1.4KW AC Power Module with Port-side Air Exhaust Release 7.0.12
PSU2KW-ACPI Cisco 2KW AC Power Module with Port-side Air Intake Release 7.3.1
PSU2KW-ACPE Cisco 2KW AC Power Module with Port-side Air Exhaust Release 7.3.1
PSU3KW-HVPI Cisco 3KW HV AC/DC Power Supply Unit Release 7.5.3

Table 7. Supported hardware for Cisco 8600 Series Routers

Part Number Description Support Initially Provided in IOS XR Release
Cisco 8600 Series Routers - Chassis
8608 Cisco 8600 7 RU Centralized System Release 7.10.1
Cisco 8600 Series Routers - Modular Port Adapters (MPA)
86-MPA-14H2FH-M Cisco 8608 MPA - 2 QSFP-DD 400GbE and 14 QSFP / 16 QSFP 100GbE Release 7.10.1
86-MPA-24Z-M Cisco 8608 MPA - 24 SFP56 10/25/50 GbE Release 7.10.1
86-MPA-4FH-M Cisco 8608 MPA - 4 QSFP-DD 400GbE Release 7.10.1
Cisco 8600 Series Routers - Power Supply Unit (PSU)
PSU3.2KW-ACPI Cisco 3.2-kW AC Power Supply Unit Release 7.10.1
PSU3.2KW-DCPI Cisco 3.2-kW DC Power Supply Unit Release 7.10.1
PSU4.3KW-HVPI Cisco 4.3KW HV AC/DC Power Supply Unit Release 7.10.1

Table 8. Supported hardware for Cisco 8700 Series Routers

Part Number Description Support Initially Provided in IOS XR Release
Cisco 8700 Series Routers - Chassis
8711-32FH-M Cisco 8700 1 RU Fixed System - 16 QSFP-DD800 and 16 QSFP56-DD Release 24.3.1
8712-MOD-M Cisco 8700 2 RU Fixed System Release 24.4.1
Cisco 8700 Series Routers - Modular Port Adapters (MPA)
8K-MPA-4D Cisco 8712 MPA - 4 QSFP-DD 400GbE Release 24.4.1
8K-MPA-16H Cisco 8712 MPA - 16 QSFP-28 100GbE Release 24.4.1
8K-MPA-16Z2D Cisco 8712 MPA - 2 QSFP-DD 400GbE, 2 QSFP-DD 200GbE, and 16 SFP 50GbE Release 24.4.1
8K-MPA-18Z1D Cisco 8712 MPA - 1 QSFP-DD 400 GbE and 18 zSFP56+ 50GbE Release 25.1.1
Cisco 8700 Series Routers – Power Supply Unit (PSU)
PSU2KW-ACPI Cisco 8711-32FH-M PSU - 2KW AC Power Module with Port-side Air Intake Release 24.3.1
PSU2KW-ACPE Cisco 8711-32FH-M PSU - 2KW AC Power Module with Port-side Air Exhaust Release 24.3.1
PSU2KW-DCPI Cisco 8711-32FH-M PSU - 2KW DC Power Module with Port-side Air Intake Release 24.3.1
PSU2KW-DCPE Cisco 8711-32FH-M PSU - 2KW DC Power Module with Port-side Air Exhaust Release 24.3.1
PSU2KW-DCPI Cisco 8712-MOD-M PSU - 2KW 48V DC Power Module with Port-side Air Intake Release 24.4.1
PSU2KW-DCPE Cisco 8712-MOD-M PSU - 2KW 48V DC Power Module with Port-side Exhaust Release 24.4.1
PSU2KW-ACPI Cisco 8712-MOD-M PSU - 2KW AC Power Module with Port-side Air Intake Release 24.4.1
PSU2KW-ACPE Cisco 8712-MOD-M PSU - 2KW AC Power Module with Port-side Exhaust Release 24.4.1

Table 9. Supported hardware for Cisco 8800 Series Routers

Part Number Description Support Initially Provided in IOS XR Release
Cisco 8800 Series Routers - Chassis
8804-SYS Cisco 8800 Modular System - 10 RU with 4 Line Card Slots Release 7.3.2
8808-SYS Cisco 8800 Modular System - 16 RU with 8 Line Card Slots Release 7.0.12
8812-SYS Cisco 8800 Modular System - 21 RU with 12 Line Card Slots Release 7.0.12
8818-SYS Cisco 8800 Modular System - 33 RU with 18 Line Card Slots Release 7.0.14
Cisco 8800 Series Routers - Route Processors
8800-RP Cisco 8800 Route Processor - 4 Core Release 7.0.12
8800-RP2 Cisco 8800 Route Processor - 8 Core Release 7.11.1
Cisco 8800 Series Routers - Fabric Modules
8808-FC Cisco 8808 System Fabric Module - Q100-based fabric modules with 14.4T per LC slot Release 7.0.12
8812-FC Cisco 8812 System Fabric Module - Q100-based fabric modules with 14.4T per LC slot Release 7.0.12
8818-FC Cisco 8818 System Fabric Module - Q100-based fabric modules with 14.4T per LC slot Release 7.0.14
8808-FC0 Cisco 8808 System Fabric Module - Q200-based fabric modules with 14.4T per LC slot Release 7.3.15
8818-FC0 Cisco 8818 System Fabric Module - Q200-based fabric modules with 14.4T per LC slot Release 7.3.16
8804-FC0 Cisco 8804 System Fabric Module - Q200-based fabric modules with 14.4T per LC slot Release 7.3.16
8808-FC1 Cisco 8808 System Fabric Module - F100-based fabric modules with 28.8T per LC slot Release 24.2.1
8804-FC1 Cisco 8804 System Fabric Module - F100-based fabric modules with 28.8T per LC slot Release 25.1.1
Cisco 8800 Series Routers - Line Cards
8800-LC-48H Cisco 8800 Line Card with MACsec - Q100 ASIC based 4.8 Tbps line card Release 7.0.12
8800-LC-36FH Cisco 8800 Line Card - Q100 ASIC based 14.4 Tbps line card Release 7.0.12
88-LC0-36FH Cisco 8800 Line Card - Q200 ASIC based 14.4 Tbps line card Release 7.3.15
88-LC0-36FH-M Cisco 8800 Line Card with MACsec- Q200 ASIC based 14.4 Tbps line card Release 7.3.15
88-LC0-34H14FH Cisco 8800 Line Card - Q200 ASIC based 9 Tbps line card Release 7.3.3
Release 7.5.1
88-LC1-36EH Cisco 8800 Line Card - P100 ASIC based 28.8 Tbps line card Release 24.2.11
88-LC1-12TH24FH-E Cisco 8800 Line Card - P100 ASIC based 12 Tbps line card Release 24.3.1
88-LC1-52Y8H-EM Cisco 8800 Line Card - P100 ASIC based 3.7 Tbps line card Release 24.3.1
Cisco 8800 Series Routers – Power Supply Unit (PSU)
PSU4.8KW-DC100 4.8KW 48V 100A DC Power Supply Release 7.3.2
PSU6.3KW-HV 6.3KW AC/HVAC/HVDC Power Supply Release 7.0.12
PSU6.3KW-20A-HV 6.3KW AC/HVAC/HVDC Power Supply-20A Release 7.0.12

Supported software packages

Overview of Cisco IOS XR software

The Cisco IOS XR software is composed of a base image (ISO) that provides the XR infrastructure. The ISO image is made up of a set of packages (also called RPMs). These packages are of three types:

Visit the Cisco Software Download page to download the Cisco IOS XR software images.

View installed software packages

To determine the Cisco IOS XR Software packages installed on your router, log in to the router and enter the show install active command. To view the optional and bug fix RPM packages, first install the package and use the show install active summary command.

To know about all the RPMs installed including XR, OS and other components use the show install active all command.

Flexible software modularity

The software modularity approach provides a flexible model that allows you to install a subset of IOS XR packages on devices based on your individual requirements. All critical components are modularized as packages so that you can select the features that you want to run on your router.

Determine firmware support

To determine firmware support on your router, log in to the router and enter show fpd package command.

Related resources

Table 10. Related resources

Resource Description
Smart licensing Provides information about Smart Licensing Using Policy solutions and their deployment on IOS XR routers.
Cisco 8000 documentation Provides CDC documentation for Cisco 8000 series routers.
Transceiver Module Group (TMG) compatibility matrix Allows searching by product family, product ID, data rate, reach, cable type, or form factor to determine the transceivers that Cisco hardware device supports.
Cisco IOS XR Error messages Allows searching by release number, error strings, or comparing release numbers to view a detailed repository of error messages and descriptions.
Cisco IOS XR MIBs Allows selecting the MIB of your choice from a drop-down to explore an extensive repository of MIB information.
Yang data models in GitHub Provides yang data models introduced and enhanced in every IOS XR release.
Recommended release Provides a general guide in case of upgrading IOS XR routers or new deployments that involve IOS XR routers.

Legal information

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks.

Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2025 Cisco Systems, Inc. All rights reserved.

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This document provides release notes for Cisco IOS XRv 9000 Routers and IOS XR Release 25.1.2, detailing new software features, hardware, changes in behavior, open and known issues, compatibility, and related resources.
Preview Cisco IOS XRd and IOS XR Release 25.1.2 Release Notes
This document provides release notes for Cisco IOS XRd and IOS XR Release 25.1.2, detailing supported deployments, related resources, and legal information. It is an extended maintenance release with no new software features or hardware.
Preview Cisco NCS 5500 Series Routers, IOS XR Release 25.1.2 Release Notes
This document provides release notes for Cisco NCS 5500 Series Routers running IOS XR Release 25.1.2. It details new software features, hardware, changes in behavior, open and known issues, compatibility information, supported software packages, and related resources.
Preview Cisco IOS XR Release 7.3.2: Release Notes for Cisco 8000 Series Routers
Details new features, enhancements, and hardware support for Cisco 8000 Series Routers running Cisco IOS XR Release 7.3.2, including models 8100, 8200, and 8800.
Preview Cisco 8000 Series Routers System Security Configuration Guide for IOS XR 7.0.x
Learn how to configure system security for Cisco 8000 Series Routers with IOS XR Release 7.0.x. This guide covers trustworthy systems, AAA services, CA interoperability, and other critical security features for network devices.
Preview Modular QoS Configuration Guide for Cisco 8000 Series Routers, IOS XR Release 7.8.x
This guide provides detailed information on configuring Modular Quality of Service (QoS) features for Cisco 8000 Series Routers running IOS XR Release 7.8.x. It covers topics such as packet classification, traffic shaping, policing, and congestion avoidance.