Introduction

The Cisco ASR 900 Series Routers are full-featured, modular aggregation platforms designed for the cost-effective delivery of converged mobile, residential, and business services. This document provides information about the IOS XE software release for the Cisco ASR 900 Series Routers beginning with Release 16.6.1.

Overview of Cisco ASR 900 Series Routers

The Cisco ASR 900 Series Router is a fully-featured routing platform designed for the cost-effective delivery of converged mobile and business services. With full redundancy, shallow depth, low power consumption and high service scale, this 3-rack-unit (3RU) router is optimized for small aggregation and remote point-of-presence (POP) applications. The Cisco ASR 900 Series Router provides a rich and scalable feature set of Legacy, Timing, Carrier Ethernet, Layer 2 VPN (L2VPN) and Layer 3 VPN (L3VPN) services in a compact package.

The Cisco ASR 900 Series Router is a fully modular platform with support for upto 6-Interface Modules (IMs), two Route Switch Processor (RSP) slots, two power supplies and redundant fans, based on the router model. Cisco offers a wide choice of LAN and WAN interfaces available in speeds ranging from nxDS0 to 10 Gigabit Ethernet. The design of the Cisco ASR 900 Series Router delivers in-box hardware redundancy for all hardware components and supports software redundancy with In Service Software Upgrade (ISSU) and Non-Stop Forwarding (NSF) support.

Cisco ASR 900 Series Router

The Cisco ASR 900 Series Router is a fully-featured routing platform designed for the cost-effective delivery of converged mobile and business services. With full redundancy, shallow depth, low power consumption and high service scale, this 3-rack-unit (3RU) router is optimized for small aggregation and remote point-of-presence (POP) applications. The Cisco ASR 900 Series Router provides a rich and scalable feature set of Legacy, Timing, Carrier Ethernet, Layer 2 VPN (L2VPN) and Layer 3 VPN (L3VPN) services in a compact package.

The Cisco ASR 900 Series Router is a fully modular platform with support for upto 6-Interface Modules (IMs), two Route Switch Processor (RSP) slots, two power supplies and redundant fans, based on the router model. Cisco offers a wide choice of LAN and WAN interfaces available in speeds ranging from nxDS0 to 10 Gigabit Ethernet. The design of the Cisco ASR 900 Series Router delivers in-box hardware redundancy for all hardware components and supports software redundancy with In Service Software Upgrade (ISSU) and Non-Stop Forwarding (NSF) support.

Cisco ASR 902 Router

The Cisco ASR 902 Router is a full-featured aggregation platform designed for cost-effective delivery of converged mobile and business services. With shallow depth, low power consumption, and an extended temperature range, this compact 2-rack unit (2RU) router provides high service scale and flexible hardware configuration.

Cisco ASR 903 Router

The Cisco ASR 903 Series Aggregation Services Router is a Cisco aggregation router product. This router uses an innovative and powerful forwarding technology known as the Cisco Carrier Ethernet ASIC.

The Cisco ASR 903 Series Router is a 6-Interface Module (IM), 3-RU, hardware-redundant chassis with two Route Switch Processor (RSP) slots, and six IM slots. It supports fully redundant RSPs that allow for full RSP hardware redundancy, NSF, ISSU, and future RSP service upgrades.

Cisco ASR 907 Router

The Cisco ASR 907 Router seven-rack (7RU) unit router that belongs to the Cisco ASR90x family of routers. This router complements Cisco’s offerings for IP RAN solutions for the GSM, UMTS, LTE and CDMA. Given its form-factor, interface types and Gigabit Ethernet density the Cisco ASR 907 Router can also be positioned as a Carrier Ethernet aggregation platform.

The Cisco ASR 907 Router is a cost optimized, fully redundant, centralized forwarding, extended temperature, and flexible pre-aggregation router.

Feature Navigator

You can use Cisco Feature Navigator to find information about feature, platform, and software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on cisco.com is not required.

Hardware Support

Cisco ASR 902 Supported Interface Modules

A900-RSP2-Supported Interface Modules (ASR 902 Router)

Table 1. A900-RSP2-Supported Interface Modules and Part Numbers

RSP

Interface Modules

Part Numbers

Slots

A900-RSP2A-128

A900U-RSP2A-128

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

All

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8x1GE)

A900-IMA8T

1-port 10-Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

16-port T1/E1 Interface Module

A900-IMA16D

4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4 (OC-12) Interface Module

A900-IMA4OS

SFP Combo IM—8-port Gigabit Ethernet (8x1GE) +

1-port 10-Gigabit Ethernet (1x10GE)

A900-IMA8S1Z

Copper Combo IM—8-port Gigabit Ethernet (8x1GE)

+ 1-port 10-Gigabit Ethernet Interface Module (1x10GE)

A900-IMA8T1Z

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

14-port Serial Interface Module

A900-IMASER14A/S

4-port C37.94 Interface Module

A900-IMA4C3794

A900-RSP2A-64

A900U-RSP2A-64

1-port 10 Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

0-2

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4

(OC-12) Interface Module

A900-IMA4OS

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

0, 2 and 3

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8x1GE)

A900-IMA8T

16-port T1/E1 Interface Module

A900-IMA16D

32-port T1/E1 Interface Module

A900-IMA32D

8-port T1/E1 Interface Module

A900-IMA8D

6-port E & M Interface Module

A900-IMA6EM

14-port Serial Interface Module

A900-IMASER14A/S

4-port C37.94 Interface Module

A900-IMA4C3794

A900-RSP3C-200-S Supported Interface Modules (ASR 902 Router)

Table 2. A900-RSP3C-200 Supported Interface Modules and Part Numbers

RSP Module

Supported Interface Modules

Part Numbers

Slot

A900-RSP3C-200-S

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

All1

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8x1GE)

A900-IMA8T

1-port 10 Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

0 and 1

SFP Combo IM—8-port Gigabit Ethernet (8x1GE) +

1-port 10 Gigabit Ethernet (1x10GE)

A900-IMA8S1Z

All

Copper Combo IM—8-port Gigabit Ethernet (8x1GE)

+ 1-port 10 Gigabit Ethernet Interface Module (1x10GE)

A900-IMA8T1Z

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

8-port 10 Gigabit Ethernet Interface Module (8x10GE)

A900-IMA8Z

0

2-port 40 Gigabit Ethernet QSFP Interface Module (2x40GE)

A900-IMA2F
1 There are restrictions using the interface modules in different slots with RSP3 module. Contact Cisco Sales/Support for the valid combinations..

Supported RSP and Interface Modules on the Cisco ASR 903 Router

Table 3. A900-RSP2 Supported Interface Modules and Part Numbers

RSP Module

Supported Interface Modules

Part Numbers

Slot

A900-RSP2A-128

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

All

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8x1GE)

A900-IMA8T

1-port 10 Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

16-port T1/E1 Interface Module

A900-IMA16D

32-port T1/E1 Interface Module

A900-IMA32D

8-portT1/E1 Interface Module

A900-IMA8D

4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4 (OC-12) Interface Module

A900-IMA4OS

SFP Combo IM—8-port SFP Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet (1x10GE)

A900-IMA8S1Z

Copper Combo IM—8-port 10/100/1000 Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet Interface Module (1x10GE)

A900-IMA8T1Z

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

6-port E & M Interface Module

A900-IMA6EM

14-port Serial Interface Module

A900-IMASER14A/S

4-port C37.94 Interface Module

A900-IMA4C3794

A900-RSP2A-64

1-port 10 Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

0-2

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4

(OC-12) Interface Module

A900-IMA4OS

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

3-5

8-port Gigabit Ethernet RJ45 (Copper) Interface Module

(8x1GE)

A900-IMA8T

16-port T1/E1 Interface Module

A900-IMA16D

32-port T1/E1 Interface Module

A900-IMA32D

8-port T1/E1 Interface Module

A900-IMA8D

6-port E & M Interface Module

A900-IMA6EM

14-port Serial Interface Module

A900-IMASER14A/S

4-port C37.94 Interface Module

A900-IMA4C3794


Note
The combination IMs (A900-IMA8S1Z, A900-IMA8T1Z) are not supported on the A900-RSP2-64 RSP module on the Cisco ASR 900 Series Router.
Table 4. A900-RSP3C-400 Supported Interface Modules and Part Numbers

RSP Module

Supported Interface Modules

Part Numbers

Slot

A900-RSP3C-400-S

8-port Gigabit Ethernet SFP Interface Module (8x1GE)

A900-IMA8S

All2

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8x1GE)

A900-IMA8T

1-port 10 Gigabit Ethernet XFP Interface Module (1x10GE)

A900-IMA1X

SFP Combo IM—8-port SFP Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet (1x10GE)

A900-IMA8S1Z

Copper Combo IM—8-port 10/100/1000 Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet Interface Module (1x10GE)

A900-IMA8T1Z

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

A900-IMA2Z

8-port 10 Gigabit Ethernet Interface Module (8x10GE)

A900-IMA8Z

1-port 100 Gigabit Ethernet Interface Module (1x100GE)

A900-IMA1C

4 and 5

2-port 40 Gigabit Ethernet QSFP Interface Module (2x40GE)

A900-IMA2F

4 and 5

2 There are restrictions using the interface modules in different slots with RSP3 module. Contact Cisco Sales/Support for the valid combinations.

Supported RSP and Interface Modules on the Cisco ASR 907 Router

Table 5. A900-RSP3 Supported Interface Modules and Part Numbers

RSP Module

Interface Modules

Part Number

Slot

A900-RSP3C-400-W

8-port Gigabit Ethernet SFP Interface Module (8X1GE)

A900-IMA8S

0,1,2,5,6,9,10,13,14,15

8-port Gigabit Ethernet RJ45 (Copper) Interface Module (8X1GE)

A900-IMA8T

0,1,2,5,6,9,10,13,14,15

SFP Combo IM—8-port Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet (1x10GE)

ASR900-IMA8S1Z

2,5,6,9,10,13,14,15

Copper Combo IM—8-port Gigabit Ethernet (8x1GE) + 1-port 10 Gigabit Ethernet Interface Module (1x10GE)

ASR900-IMA8T1Z

2,5,6,9,10,13,14,15

2-port 10 Gigabit Ethernet Interface Module (2x10GE)

ASR900-IMA2Z

3,4,7,8,11,12

1-port 100 Gigabit Ethernet Interface Module (1x100GE)

A900-IMA1C

7,8

2-port 40 Gigabit Ethernet QSFP Interface Module (2x40GE)

A900-IMA2F

3,4,7,8,11,12

8-port 10 Gigabit Ethernet Interface Module (8x10GE)

A900-IMA8Z

3,4,7,8,11,12

OC-192 Interface Module with 8-port Low Rate CEM Interface Module (10G HO/10G LO)

A900-IMA8S1Z-CX

3,4,7,8,11,12

48XT1/E1 Interface module

A900-IMA48D-C

0,1,2,3,4,5,6,7,8,9,10,13,14,15

48XT3/E3 Interface module

A900-IMA48T-C

0,1,2,3,4,5,6,7,8,9,10,13,14,15

Feature Matrix

The feature matrix lists the features that are supported for each platform. For more information, see the cumulative Feature Compatibility Release Matrix on the Content Hub.

Software Licensing Overview

The router offers the following base licenses:

  • Metro Services

  • Metro IP Services

  • Metro Aggregation Services

Table 6. Cisco ASR 900 Software Licenses Feature Set

Metro Services

Metro IP Services

Metro Aggregation Services

—

Includes all features in Metro Services

Includes all features in Metro IP Services

QoS, with deep buffers and hierarchical QoS (HQOS)

IP routing (RIP, OSPF, EIGRP, BGP, IS-IS)

MPLS (LDP and VPN)

Layer 2: 802.1d, 802.1q

PIM (SM, DM, SSM), SSM mapping

MPLS TE and FRR

Ethernet Virtual Circuit (EVC)

BFD

MPLS OAM

Ethernet OAM (802.1ag, 802.3ah)

Multi-VRF CE (VRF lite) with service awareness (ARP, ping, SNMP, syslog, trace-route, FTP, TFTP)

MPLS-TP

Multiple Spanning Tree (MST) and Resilient Ethernet Protocol (REP)

IEEE 1588-2008 Ordinary Slave Clock and Transparent Clock

Pseudowire emulation (EoMPLS, CESoPSN, and SAToP)

Synchronous Ethernet

—

VPLS and HVPLS

IPv4 and IPv6 host connectivity

—

Pseudowire redundancy

—

—

MR-APS and mLACP
The router offers the following additional feature licenses:

  • ATM

  • IEEE 1588-2008 Boundary Clock/Master Clock

  • OC-overview- Port License


Note

These features require a software license to use.

Determining the Software Version

You can use the following commands to verify your software version:

  • Consolidated Package—show version

  • Individual sub-packages—show version installed (lists all installed packages)

Upgrading to a New Software Release

Only Cisco IOS XE Everest 16.6.1 consolidated packages can be downloaded from Cisco.com; users who want to run the router using individual subpackages must first download the image from Cisco.com and extract the individual subpackages from the consolidated package.

For information about upgrading to a new software release, see the Cisco ASR 900 Series Router Configuration Guide.

ROMMON Version

We recommend you to upgrade the ROMMON version to 15.6(20r)S.

For more information on the ROMMON package, see Cisco Software Download.

ROMMON Version for Cisco IOS XE Everest 16.6.7

The below table lists the ROMMON versions supported for ASR 900 series routers in the Cisco IOS XE Everest 16.6.7 Release.

Table 7. RMMON Versions for Cisco IOS XE Everest 16.6.7

Gigabit Ethernet Interface Module

ROMMON Version

A900-IMA2Z

15.6(30r)S

A900-IMA8S

A900-IMA8T1Z

A900-IMA1C

15.6(33r)S

A900-IMA8Z

A900-IMA8S1Z

A900-IMA1C

15.6(33r)S

A900-IMA2Z

Supported FPGA Versions

Use the show hw-module all fpd command to display the FPGA version on the router.

The below table lists the FPGA version for the software releases.


Note
If there is an FPGA upgrade during ISSU, it will cause traffic disruption. TDM interface modules get reset irrespective of FPGA upgrade during the ISSU.
Table 8. IM FPGA Versions for all Ethernet Phase 1 and Phase 2 IMs

Cisco IOS XE Release

Gigabit Ethernet Interface Module (Phase 1) FPGA

Gigabit Ethernet Interface Module (Phase 2) FPGA

TDM Interface Module FPGA

RSP2 Module HoFPGA

16.6.1

  • A900-IMA2Z — 0.47

  • A900-IMA8T / A900-IMA8S — 0.47

  • A900-IMA2Z — 69.22

  • A900-IMA8T / A900-IMA8S — 69.24

—

0X00030005
Table 9. CEM FPGA Versions

Cisco IOS XE Release

48 X T1/E1 CEM Interface Module FPGA

48 X T3/E3 CEM Interface Module FPGA

OC-192 Interface Module + 8-port Low Rate Interface Module FPGA

16.6.1

0x46310046

0x46310046

5G mode: 0x10070059

10G mode: 0x10050073
Table 10. IM FPGA Versions for ASR 903 RSP3 and ASR 907

Cisco IOS XE Release

IO FGPA

8 x10 FPGA

2x40 FPGA

1x100 FPGA

16.6.1

2.9

0.21

0.22

0.20

Supported FPGA Versions for Cisco IOS XE Everest 16.6.7 Release

The below table lists the FPGA and HoFPGA versions for the Cisco IOS XE Everest 16.6.7 Release.

Table 11. FPGA and HoFPGA versions for Cisco IOS XE Everest 16.6.7 Release

Gigabit Ethernet Interface Module

FPGA Version

Minimum Required FPGA Version

HoFPGA (Active and Standby)

A900-IMA2Z

69.22

69.22

0X000A0008

A900-IMA8S

0.49

0.47

A900-IMA8T1Z

69.24

69.24

A900-IMA1C

0.2

0.2

40024

A900-IMA8Z

0.22

0.21

A900-IMA8S1Z

69.24

69.24

A900-IMA1C

0.2

0.19

20040024

A900-IMA2Z

69.22

69.22

MIB Support

The below table summarizes the supported MIBs on the Cisco ASR 900 Series Router.

Table 12. Supported MIBs

Supported MIBs

BGP4-MIB (RFC 1657)

CISCO-IMAGE-LICENSE-MGMT-MIB

MPLS-LDP-STD-MIB (RFC 3815)

CISCO-BGP-POLICY-ACCOUNTING-MIB

CISCO-IMAGE-MIB

MPLS-LSR-STD-MIB (RFC 3813)

CISCO-BGP4-MIB

CISCO-IPMROUTE-MIB

MPLS-TP-MIB

CISCO-BULK-FILE-MIB

CISCO-LICENSE-MGMT-MIB

MSDP-MIB

CISCO-CBP-TARGET-MIB

CISCO-MVPN-MIB

NOTIFICATION-LOG-MIB (RFC 3014)

CISCO-CDP-MIB

CISCO-NETSYNC-MIB

OSPF-MIB (RFC 1850)

CISCO-CEF-MIB

CISCO-OSPF-MIB

OSPF-TRAP-MIB (RFC 1850)

CISCO-CLASS-BASED-QOS-MIB

CISCO-OSPF-TRAP-MIB

PIM-MIB (RFC 2934)

CISCO-CONFIG-COPY-MIB

CISCO-PIM-MIB

RFC1213-MIB

CISCO-CONFIG-MAN-MIB

CISCO-PROCESS-MIB

RFC2982-MIB

CISCO-DATA-COLLECTION-MIB

CISCO-PRODUCTS-MIB

RMON-MIB (RFC 1757)

CISCO-EMBEDDED-EVENT-MGRMIB

CISCO-PTP-MIB

RSVP-MIB

CISCO-ENHANCED-MEMPOOL-MIB

CISCO-RF-MIB

SNMP-COMMUNITY-MIB (RFC 2576)

CISCO-ENTITY-ALARM-MIB

CISCO-RTTMON-MIB

SNMP-FRAMEWORK-MIB (RFC 2571)

CISCO-ENTITY-EXT-MIB

CISCO-SONET-MIB

SNMP-MPD-MIB (RFC 2572)

CISCO-ENTITY-FRU-CONTROLMIB

CISCO-SYSLOG-MIB

SNMP-NOTIFICATION-MIB (RFC 2573)

CISCO-ENTITY-SENSOR-MIB

DS1-MIB (RFC 2495)

SNMP-PROXY-MIB (RFC 2573)

CISCO-ENTITY-VENDORTYPE-OID-MIB

ENTITY-MIB (RFC 4133)

SNMP-TARGET-MIB (RFC 2573)

CISCO-FLASH-MIB

ENTITY-SENSOR-MIB (RFC 3433)

SNMP-USM-MIB (RFC 2574)

CISCO-FTP-CLIENT-MIB

ENTITY-STATE-MIB

SNMPv2-MIB (RFC 1907)

CISCO-IETF-ISIS-MIB

EVENT-MIB (RFC 2981)

SNMPv2-SMI

CISCO-IETF-PW-ATM-MIB

ETHERLIKE-MIB (RFC 3635)

SNMP-VIEW-BASED-ACM-MIB (RFC 2575)

CISCO-IETF-PW-ENET-MIB

IF-MIB (RFC 2863)

SONET-MIB

CISCO-IETF-PW-MIB

IGMP-STD-MIB (RFC 2933)

TCP-MIB (RFC 4022)

CISCO-IETF-PW-MPLS-MIB

IP-FORWARD-MIB

TUNNEL-MIB (RFC 4087)

CISCO-IETF-PW-TDM-MIB

IP-MIB (RFC 4293)

UDP-MIB (RFC 4113)

CISCO-IF-EXTENSION-MIB

IPMROUTE-STD-MIB (RFC 2932)

CISCO-FRAME-RELAY-MIB

CISCO-IGMP-FILTER-MIB

MPLS-LDP-GENERIC-STD-MIB (RFC 3815)

IF-MIB

CISCO-AAA-SERVER-MIB

—

—
Table 13. Unverified MIBs

Unverified MIBs

ATM-MIB

CISCO-IETF-DHCP-SERVER-EXT-MIB

EXPRESSION-MIB

CISCO-ATM-EXT-MIB

—

HC-ALARM-MIB

CISCO-ATM-IF-MIB

CISCO-IETF-PPVPN-MPLS-VPN-MIB

HC-RMON-MIB

CISCO-ATM-PVC-MIB

CISCO-IP-STAT-MIB

IEEE8021-CFM-MIB

CISCO-ATM-PVCTRAP-EXTN-MIB

CISCO-IPSLA-ETHERNET-MIB

IEEE8021-CFM-V2-MIB

CISCO-BCP-MIB

CISCO-L2-CONTROL-MIB

IEEE8023-LAG-MIB

CISCO-CALLHOME-MIB

CISCO-LAG-MIB

INT-SERV-GUARANTEED-MIB

CISCO-CIRCUIT-INTERFACE-MIB

CISCO-MAC-NOTIFICATION-MIB

INTEGRATED-SERVICES-MIB

CISCO-CONTEXT-MAPPING-MIB

CISCO-MEMORY-POOL-MIB

MPLS-L3VPN-STD-MIB (RFC 4382)

CISCO-EIGRP-MIB

CISCO-NHRP-EXT-MIB

MPLS-LDP-ATM-STD-MIB (RFC 3815)

CISCO-ERM-MIB

CISCO-NTP-MIB

MPLS-LDP-MIB

CISCO-ETHER-CFM-MIB

CISCO-PING-MIB

MPLS-TE-STD-MIB

CISCO-ETHERLIKE-EXT-MIB

CISCO-RESILIENT-ETHERNET-PROTOCOL-MIB

MPLS-VPN-MIB

CISCO-EVC-MIB

CISCO-RTTMON-ICMP-MIB

NHRP-MIB

CISCO-HSRP-EXT-MIB

CISCO-RTTMON-IP-EXT-MIB

RFC2006-MIB (MIP)

CISCO-HSRP-MIB

CISCO-RTTMON-RTP-MIB

RMON2-MIB (RFC 2021)

CISCO-IETF-ATM2-PVCTRAP-MIB

CISCO-SNMP-TARGET-EXT-MIB

SMON-MIB

CISCO-IETF-ATM2-PVCTRAP-MIBEXTN

CISCO-TCP-MIB

VRRP-MIB

CISCO-IETF-BFD-MIB

CISCO-VRF-MIB

—

CISCO-IETF-DHCP-SERVER-MIB

ETHER-WIS (RFC 3637)

—

MIB Documentation

The following resources provide more detail about MIBs on the Cisco ASR 900 Series Router: