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

PDF

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

Interface statistics

Updated: July 31, 2026

Want to summarize with AI?

Log in

This topic covers interface statistics, traffic rate displays, and real-time monitoring commands.

Interface counters report

The Interface Counters report is a functionality you can use on interfaces that

  • provides statistics for all configured interfaces

  • displays interface status and packet counts, and

  • calculates traffic rates over a configurable load interval.

The report displays these statistics:

  • interfaces configured

  • the input and output rate

  • the total number of packets transmitted and received

  • the time interval

  • the current status of each interface

  • the packet counts for input and output broadcast, multicast, and errored packets

The show interfaces command provides detailed statistics based on the following configurations:

  • The command displays the input and output rate for each interface.

  • The traffic rate displays the average number of packets received per second over the load interval. The load interval is configurable on the physical and bundle main interface.

  • The report displays the load on the interface for a longer duration of time and does not show a spike in the traffic rate. This rate is the exponentially weighted average with a time constant of the load interval.

For more information about the use of the show interfaces command, see Interface and Hardware Component Command Reference for Cisco 8000 Series Routers.

Note

For the average to be within two percent of the instantaneous rate of a uniform stream of traffic, four times the load interval must pass.

Instant display of traffic rates for physical interfaces

The show interfaces counters rates physical command is a diagnostic tool that

  • provides a snapshot of physical interface statistics

  • presents data in a tabular format for analysis, and

  • displays real-time link utilization.

Feature history

Feature name

Release information

Feature description

Instant display of traffic rates on all physical interfaces

Release 7.5.4

You can now display a snapshot of the traffic throughput and traffic rate on all physical interfaces over the last few seconds. We have introduced a show command to view the counters and rate information for the interfaces.

The feature introduces these:

The router provides real-time statistics through the following process:

  • The command displays input and output rates in Mbps and Kpps.

  • The router calculates statistics over a 5-second interval.

  • The router adjusts the time interval during high processing loads, such as routing updates.

View the statistics

Use the show interfaces counters rates physical command to view statistics of all physical interfaces.

Router#show interfaces counters rates physical
    InterfaceName          Intvl   InMbps   InBW%  InKpps  OutMbps  OutBW%   OutKpps
    GigabitEthernet0/2/0/0  0:05    0.0     0.0%    0.0       0.0     0.0%       0.0
    GigabitEthernet0/2/0/1  0:05    0.0     0.0%    0.0       0.0     0.0%       0.0
    GigabitEthernet0/2/0/2  0:05    0.0     0.0%    0.0       0.0     0.0%       0.0
    GigabitEthernet0/2/0/3  0:05  235.0    22.0%   23.5      87.0     9.5%       7.2
    GigabitEthernet0/3/0/0  0:05   88.0     9.3%    7.0     100.0    10.0%      10.5
    GigabitEthernet0/3/0/1  0:05    0.0     0.0%    0.0       0.0     0.0%       0.0
Note

The traffic rate displayed is the real-time link utilization of the time interval. The time interval is determined by the system and may vary based on the system processing load. The time interval increases during events where the system is handling, for example, performing routing updates.

Display of traffic rates for bundle interfaces

The show interfaces counters rates bundle command displays a snapshot of statistics for all the bundle interfaces at a given instant for your quick reference. The statistics display is in a tabular format facilitating easy analysis.

Feature history

Feature name

Release information

Description

Display of traffic rates for bundle interfaces

 Release 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.

Display of traffic rates for bundle interfaces

 Release 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

Display of traffic rates for bundle interfaces

Release 25.1.1

Introduced in this release on: Fixed Systems (8700 [ASIC: K100], 8010 [ASIC: A100])(select variants only*)

*This feature is supported on:

  • 8712-MOD-M

  • 8011-4G24Y4H-I

Display of traffic rates for bundle interfaces

 Release 24.4.1

Routers can now display a snapshot of the traffic throughput and traffic rate on all bundle interfaces over the last few seconds, facilitating easy analysis. These statistics are presented in a tabular format for quick reference.

The feature introduces these changes:

CLI:

YANG Data Models:

  • The existing Xpath interface-rate in Cisco-IOS-XR-infra-statsd-oper.yang is extended to retrieve bundle interface statistics.

(see GitHub, YANG Data Models Navigator)

Guidelines and restrictions for the display of traffic rates for bundle interfaces

These configuration guidelines and restrictions apply for the display of traffic rates for bundle interfaces:

  • The displayed traffic rate represents the real-time link utilization for a given time interval. This interval is system-determined and may vary depending on the system processing load. During events such as routing updates, the time interval may increase.

  • The bundle main interface displays Ethernet Layer 2 counters that are derived from bundle MIB statistics. Bundle subinterfaces display Layer 3 protocol statistics. On bundle subinterfaces, byte counts exclude Ethernet overhead, CRC, and VLAN encapsulation bytes. As a result, the input and output bits-per-second values on the bundle main interface can differ from the values on its subinterfaces.

View bundle interface statistics

Procedure

Use the show interfaces counters rates bundle command to view the statistics of all bundle interfaces.

Example:

Router#show interfaces counters rates bundle
Wed Aug 14 19:54:04.842 EDT
InterfaceName               Intval     InMbps    InBW%    InKpps     OutMbps   OutBW%    OutKpps
Bundle-Ether111               0:03    38454.9    40.0%     8064.8         0.0     0.0%         0.0
Bundle-Ether112               0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1201              0:03        0.0     0.0%        0.0      9741.6     3.4%      2002.2
Bundle-Ether1202              0:03        0.0     0.0%        0.0      9703.0     5.0%      1995.4
Bundle-Ether1203              0:03        0.0     0.0%        0.0      9841.9     5.1%      2023.0
Bundle-Ether1204              0:03        0.0     0.0%        0.0     10011.3    10.4%      2058.5
Bundle-Ether1205              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1206              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1207              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1208              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1209              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1210              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1301              0:03    38698.3    13.4%     8062.7         0.0     0.0%         0.0
Bundle-Ether1302              0:03        0.0     0.0%        0.0         0.0     0.0%         0.0
Bundle-Ether1303              0:03        0.0     0.0%        0.0     38741.7    28.8%      8070.8

Frequency Synchronization and SyncE

Cisco IOS XR Software supports SyncE-capable Ethernet on the router. The Synchronous Ethernet (SyncE) is a network synchronization technology that

  • distributes precision clock signals across network infrastructures

  • injects highly accurate timing signals from external sources into routers, and

  • enables peer routers to recover and transfer frequency signals through physical interfaces.

Cisco IOS XR software provides several capabilities for managing SyncE:

  • The system utilizes external timing technologies such as Cesium atomic clocks or GPS to maintain accuracy.

  • The software passes timing signals to the physical interfaces of the router.

  • Peer routers recover the precision frequency from the line to transfer it throughout the network.

  • The feature supports Ethernet-based synchronization on Cisco 8000 Series Routers.

This feature is traditionally applicable to SONET or SDH networks, but is now available on Ethernet for Cisco 8000 Series Routers with SyncE capability. For more information, see Cisco 8000 Series Router System Management Configuration Guide.