What's New in Cisco IOS XR Release 7.6.1

Feature Description

Routing

IGP IP Flexible Algorithm for IS-IS Protocol

With IS-IS protocol extensions supporting Interior Gateway Protocol (IGP) Flexible Algorithm (Flex-Algorithm) on the IP data plane, you can now use the Algorithm to calculate IGP paths in an IP network without running Segment Routing. The IGP Flex-Algorithm allows for user-defined algorithms where the IGP computes paths based on a user-defined combination of metric type and constraints.

Earlier, you could calculate IGP only using the Shortest Path First (SPF), which meant that you didn't have any choice except to use the default IGPpath calculated based on a native IGP metric.

The following command is introduced:

The following commands are modified:

MPLS TE Preference for Tunnels

You can now configure the MPLS TE traffic for equal-cost multipath (ECMP) such that it flows only through TE tunnels. This is useful in scenarios where the hardware has resource constraints that limit the number of mixed ECMP routes.

In earlier releases, IS-IS installed multiple ECMPs for a route in the Routing Information Base (RIB) through TE tunnels and physical interfaces by default.

This feature introduces the following command:

32 IS-IS Instances

You can now configure up to 32 IS-IS instances, thus enhancing the ability to isolate resources within your router and on the network. This ability enables you to configure more instances consuming network-wide resources at different rates, giving you more flexibility to manage your networks efficiently.

In earlier releases, you could configure up to16 IS-IS instances.

Modular QoS

MPLS EXP Marking for EVPN Multi-Homed Services

This feature enables you to differentiate traffic in the MPLS forwarding domain and manage traffic from ingress PE to egress PE based on the MPLS EXP bit of the MPLS header for EVPN multi-home scenarios.

Multicast

Access Pseudowire in VPLS Bridge Domains

You can configure EVPN in the access node under the same bridge domain as EVPN in the core and create a pseudowire (PW) to the nearest PE that binds the access circuits using EVPN. This PW between the access PE and the single-homed PE ensures that the access nodes can leverage the benefits of EVPN.

Interface and Hardware Component

Local LAG hashing with PPPoE traffic

Load Balancing for Link Aggregation (LAG) AC and Equal Cost Multipath (ECMP) for PPPoE traffic is now available on Cisco NCS 560 routers and operates in the native and compatible modes. This load balancing is achieved by distributing PPPoE traffic on all available links.

L2VPN and Ethernet Services

Hierarchical EVPN Access Pseudowire

You can configure EVPN VPWS in the access node under the same bridge domain as EVPN in the core to build a PW to the nearest high-end PE that stitches those access circuits using EVPN. This allows the access nodes to leverage the benefits of EVPN.

This feature also allows you to reduce the number of pseudowires (PWs) between the network provider edge (N-PE) devices by replacing PE devices with user provider edge (U-PE) and network provider edge (N-PE) devices.

Flow-Label Support on FAT-PW

This enhancement enables the MPLS OAM pings to work between Cisco devices and the third-party devices. Thus, allowing Flow-Aware Transport (FAT) Pseudowires (PW) to provide the load-balance capability across equal-cost multipath (ECMP) routes by adding a new label, called Flow Label, onto the bottom of the label stack.

Enhancement to the show ethernet cfm command to include LTR and LTM statistics

This enhancement adds statistics for Linktrace Messages (LTM) and Linktrace Replies (LTR) in the show ethernet cfm local meps verbose command output. Using LTM and LTR count, you can trace the source of network failure and track the path to a unicast destination MAC address.

CFM on EVPN ELAN

This feature introduces CFM support for single-homed EVPN Emulated Local Area Network (ELAN) services.

This functionality helps you to monitor the ELAN services of users against their contractual service-level agreements (SLAs), thereby providing high speed Layer 2 and Layer 3 services with high resiliency and less operational complexity to different market segments.

MPLS

Enhanced Targeted LDP Session Scale Values

With the unidimensional scale parameter value increased to 1999 on the router, you can now configure more targeted LDP sessions to discover extended neighbors.

Programmability

Accounting Records for NETCONF Operations

Depending on the accounting configuration command you use, every NETCONF operation that the router performs is reported to the local server as syslog messages or remote AAA servers like TACACS+ as accounting messages, or both.

Segment Routing

Programming Non-Active Candidate Paths of an SR Policy

By programming non-active candidate paths (CPs) in the forwarding plane, you ensure that if the existing active CP is unavailable, the traffic switches quickly to the new CP, thus minimizing loss of traffic flow.

In earlier releases, instantiating a non-active CP to the forwarding plane after the unavailability of the active CP could take a few seconds, resulting in potential loss of traffic flow.

This feature introduces the following command:

Hardware

Optics

Note 

Optics support varies across devices such as routers, line cards, and RPs. To know if an optics is compatible with a specific Cisco device, refer to the Transceiver Module Group (TMG) Compatibility Matrix.

This release introduces the following optics:

PTP and Synchronous Ethernet (SyncE) 1G Mode on A900-IMA8Z-L interface modules

Based on the IEEE 1588-2008 standard, PTP is a protocol that synchronizes clocks in a network for networked measurement and control systems.

With this release, timing support for IEEE 1588-2008 (PTPv2) and SyncE is extended to the A900-IMA8Z-L interface module in 1G Mode.

For more information on the interface module slot and 1G mode support combinations on Cisco NCS 560-4 and Cisco NCS 560-7 routers, see Cisco N560-RSP4 and Cisco N560-RSP4-E Route Processor Hardware Installation Guide and Cisco NCS 560-4 Router Hardware Installation Guide.

Restrictions and Limitations on the Cisco NCS 560 Series Router

  • Unlabeled BGP PIC EDGE for global prefixes is not supported.

Cisco IOS XR Caveats Release 7.6.1

Bug ID

Headline

CSCwb13103

IPv6 BFD packets getting control timer expired due to that ISIS OSPF protocols flapped during RPFO

Supported Packages and System Requirements

For more information on system upgrade and package installation process, see Perform System Upgrade and Install Feature Packages.

For a complete list of supported optics, hardware and ordering information, see the Cisco NCS 560 Series Routers Interface Modules Data Sheet and Cisco Network Convergence System 560-4 Router Data Sheet.

To install the Cisco NCS 560 Series Routers, see Cisco N560-RSP4 and Cisco N560-RSP4-E Route Processor Hardware Installation Guide and Cisco NCS 560-4 Router Hardware Installation Guide.

Release 7.6.1 Packages

This following table lists the supported packages and their corresponding file names.

Table 1. Release 7.6.1 Packages for Cisco NCS 560 Series Router

Composite Package

Feature Set

Filename

Description

Cisco IOS XR IP Unicast Routing Core Bundle

ncs560-mini-x-7.6.1.iso

Contains base image contents that includes:

  • Host operating system

  • System Admin boot image

  • IOS XR boot image

  • BGP packages

  • OS

  • Admin

  • Base

  • Forwarding

  • Modular Services Card

  • Routing

  • SNMP Agent

  • Alarm Correlation

Cisco IOS XR Manageability Package

ncs560-mgbl-2.0.0.0-r761.x86_64.rpm

Telemetry, Extensible Markup Language (XML), Parser, and HTTP server packages, NETCONF, YANG Models, gRPC.

Cisco IOS XR OSPF package

ncs560-ospf-2.0.0.0-r761.x86_64.rpm

Supports OSPF

Cisco IOS XR Security Package

ncs560-k9sec-2.0.0.0-r761.x86_64.rpm

Support for Encryption, Decryption, Secure Shell (SSH), Secure Socket Layer (SSL), and Public-key infrastructure (PKI)

Multicast Package

ncs560-mcast-2.0.0.0-r761.x86_64.rpm

Supports Multicast

Supports Automatic Multicast Tunneling (AMT), IGMP Multicast Listener Discovery (MLD), Multicast Label Distribution Protocol (MLDP), Multicast Source Discovery Protocol (MSDP) and PIM.

Cisco IOS XR ISIS package

ncs560-isis-2.0.0.0-r761.x86_64.rpm

Supports Intermediate System to Intermediate System (IS-IS).

Cisco IOS XR USB Boot Package

ncs560-usb_boot-7.6.1.zip

Supports Cisco IOS XR USB Boot Package

Cisco IOS XR MPLS Package

ncs560-mpls-1.0.0.0-r761.x86_64.rpm

ncs560-mpls-te-rsvp-2.0.0.0-r761.x86_64.rpm

Supports MPLS and MPLS Traffic Engineering (MPLS-TE) RPM. Label Distribution Protocol (LDP), MPLS Forwarding, MPLS Operations, Administration, and Maintenance (OAM), Link Manager Protocol (LMP), Optical User Network Interface (OUNI) and Layer-3 VPN.

Cisco IOS XR MPLS-TE and RSVP Package

MPLS Traffic Engineering (MPLS-TE) and Resource Reservation Protocol (RSVP).

Cisco IOS XR LI Package

ncs560-li-1.0.0.0-r761.x86_64.rpm

Lawful Intercept

Cisco IOS XR EIGRP Package

ncs560-eigrp-1.0.0.0-r761.x86_64.rpm

(Optional) Includes EIGRP protocol support software

Determine Software Version

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

RP/0/RP0/CPU0:R3_PE3_RSP4#show version 
Tue Mar 29 16:22:57.094 IST
Cisco IOS XR Software, Version 7.6.1
Copyright (c) 2013-2022 by Cisco Systems, Inc.

Build Information:
 Built By     : ingunawa
 Built On     : Sat Mar 26 19:55:09 PDT 2022
 Built Host   : iox-ucs-052
 Workspace    : /auto/srcarchive17/prod/7.6.1/ncs560/ws
 Version      : 7.6.1
 Location     : /opt/cisco/XR/packages/
 Label        : 7.6.1

cisco NCS-560 () processor
System uptime is 1 day 4 hours 19 minutes

Determine Firmware Support

Log in to the router and enter the show hw-module fpd command to know the release image.

RP/0/RP0/CPU0:R3_PE3_RSP4#show fpd package 
Thu Mar 31 16:35:04.767 IST

=============================== ================================================
                                        Field Programmable Device Package
                                ================================================
                                               Req     SW      Min Req   Min Req
Card Type            FPD Description           Reload  Ver     SW Ver  Board Ver
=================== ========================== ====== ======= ======== =========
--------------------------------------------------------------------------------
A900-IMA8CS1Z-CC     IMFPGA                     YES     1.113     1.113     0.0
--------------------------------------------------------------------------------
A900-IMA8CS1Z-M      IMFPGA                     YES     1.113     1.113     0.0
--------------------------------------------------------------------------------
A900-IMA8Z           IMFPGA                     YES    17.05     17.05      0.0
--------------------------------------------------------------------------------
A900-IMA8Z-CC        IMFPGA                     YES    17.05     17.05      0.0
--------------------------------------------------------------------------------
A900-IMA8Z-L         IMFPGA                     YES     1.49      1.49      0.0
--------------------------------------------------------------------------------
A900-PWR1200-A       DCA-PriMCU(A)              NO      0.11      0.11      0.0
                     DCA-SecMCU(A)              NO      1.04      1.04      0.0
--------------------------------------------------------------------------------
A900-PWR1200-D       LIT-PriMCU(A)              NO      2.04      0.04      0.0
                     LIT-SecMCU(A)              NO      1.23      1.23      0.0
--------------------------------------------------------------------------------
A907-FAN-E           PSOC(A)                    NO      1.65      1.65      0.0
                     PSOC(A)                    NO      1.66      1.66      0.4
--------------------------------------------------------------------------------
N560-4-FAN-H         PSOC(A)                    NO    177.02    177.02      0.0
--------------------------------------------------------------------------------
N560-4-FAN-H-CC      PSOC(A)                    NO    177.02    177.02      0.0
--------------------------------------------------------------------------------
N560-4-PWR-FAN       PSOC(A)                    NO    177.08    177.08      0.0
--------------------------------------------------------------------------------
N560-4-PWR-FAN-CC    PSOC(A)                    NO    177.08    177.08      0.0
--------------------------------------------------------------------------------
N560-4-RSP4          ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
N560-4-RSP4-CC       ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
N560-4-RSP4E         ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
N560-4-RSP4E-CC      ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
N560-FAN-H           PSOC(A)                    NO      2.02      2.02      0.0
--------------------------------------------------------------------------------
N560-IMA-8Q/4L       IMFPGA                     YES     1.27      1.27      0.0
--------------------------------------------------------------------------------
N560-IMA1W           CFP2-D-DCO                 NO     38.27397  38.27397   0.0
                     CFP2-DE-DCO                NO     38.27397  38.27397   0.0
                     CFP2-DET-DCO               NO     38.27397  38.27397   0.0
                     CFP2-DETS-DCO              NO     38.27397  38.27397   0.0
                     CFP2-DS-DCO                NO     38.27397  38.27397   0.0
                     CFP2-DS100-DCO             NO     38.27397  38.27397   0.0
                     IMFPGA                     YES     1.28      1.28      0.0
--------------------------------------------------------------------------------
N560-IMA2C           IMFPGA                     YES     5.07      5.07      0.0
--------------------------------------------------------------------------------
N560-IMA2C-CC        IMFPGA                     YES     5.07      5.07      0.0
--------------------------------------------------------------------------------
N560-IMA2C-DD        IMFPGA                     YES     1.28      1.28      0.0
                     QDD_100_FW_P0              NO    161.10    161.10      0.0
                     QDD_100_FW_P1              NO    161.10    161.10      0.0
--------------------------------------------------------------------------------
N560-IMA2C-L         IMFPGA                     YES     1.28      1.28      0.0
--------------------------------------------------------------------------------
N560-PWR1200-D-E     QCS-PriMCU(A)              NO      1.82      1.82      0.0
                     QCS-SecMCU(A)              NO      1.84      1.84      0.0
--------------------------------------------------------------------------------
N560-RSP4            ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
N560-RSP4-E          ADM(A)                     NO      1.06      1.06      0.0
                     IOFPGA(A)                  YES     0.67      0.67      0.0
                     PRIMARY-BIOS(A)            YES     0.21      0.21      0.0
                     SATA(A)                    NO      2.10      2.10      0.0
                     SATA_MAR(A)                NO      1.30      1.30      0.0
--------------------------------------------------------------------------------
NCS4200-1T16G-PS     IMFPGA                     YES     1.113     1.113     0.0
--------------------------------------------------------------------------------
NCS4200-2H-PQ        IMFPGA                     YES     5.07      5.07      0.0
--------------------------------------------------------------------------------
NCS4200-8T-PS        IMFPGA                     YES    17.05     17.05      0.0

Log in to the router and enter the show hw-module fpd command to know the current version.

RP/0/RP0/CPU0:R3_PE3_RSP4#show hw-module fpd 
Tue Mar 29 16:23:02.242 IST

Auto-upgrade:Disabled
                                                                         FPD Versions
                                                                        ==============
Location   Card type             HWver FPD device       ATR Status    Running   Programd
-----------------------------------------------------------------------------------------
0/4        A900-IMA8CS1Z-M       0.0   IMFPGA               CURRENT     1.113     1.113
0/6        A900-IMA8CS1Z-M       0.0   IMFPGA               CURRENT     1.113     1.113
0/7        N560-IMA2C            0.0   IMFPGA               CURRENT     5.07      5.07
0/9        N560-IMA-8Q/4L        0.0   IMFPGA               CURRENT     1.27      1.27
0/10       A900-IMA8Z-L          0.0   IMFPGA               CURRENT     1.49      1.49
0/11       A900-IMA8Z            0.0   IMFPGA               CURRENT    17.05     17.05
0/RP0      N560-RSP4-E           0.0   ADM                  CURRENT     1.06      1.06
0/RP0      N560-RSP4-E           0.0   IOFPGA               CURRENT     0.67      0.67
0/RP0      N560-RSP4-E           0.0   PRIMARY-BIOS         CURRENT     0.21      0.21
0/RP0      N560-RSP4-E           0.0   SATA                 CURRENT     2.10      2.10
0/RP1      N560-RSP4-E           0.0   ADM                  CURRENT     1.06      1.06
0/RP1      N560-RSP4-E           0.0   IOFPGA               CURRENT     0.67      0.67
0/RP1      N560-RSP4-E           0.0   PRIMARY-BIOS         CURRENT     0.21      0.21
0/RP1      N560-RSP4-E           0.0   SATA                 CURRENT     2.10      2.10
0/FT0      A907-FAN-E            1.0   PSOC                 CURRENT     1.65      1.65

Important Information

Upgrading Cisco IOS XR Software

Cisco IOS XR Software is installed and activated from modular packages, allowing specific features or software patches to be installed, upgraded, or downgraded without affecting unrelated processes. Software packages can be upgraded or downgraded on all supported card types, or on a single card (node).

The upgrade document for Cisco NCS 560 router is available along with the software image in NCS560_Upgrade_MOP_7.6.1.tar file.

Use user-class Option 'xr-config' Instead Of 'exr-config' To Provision ZTP

In Cisco IOS XR Release 7.3.1 and earlier, the system accepts the device sending user-class = "exr-config"; however starting Cisco IOS XR Release 7.3.2 and later, you must use only user-class = "xr-config".

In Cisco IOS XR Release 7.3.2 and later, use:

host cisco-rp0 {
   hardware ethernet e4:c7:22:be:10:ba;
   fixed-address 172.30.12.54;
   if exists user-class and option user-class = "iPXE" {
      filename = "http://172.30.0.22/boot.ipxe";
   } elsif exists user-class and option user-class = "xr-config" {
      filename = "http://172.30.0.22/scripts/cisco-rp0_ztp.sh";
   }
}

Additional References

Supported MIBs

The Cisco NCS 5500 MIB support list is also applicable to the Cisco NCS 560 Series Routers. For the list of supported MIBs, see the Cisco NCS5500 MIB Support List.