Release Notes for Cisco ASR 901 Series Aggregation Services Router for CiscoIOSRelease15.6(2)SP1
System Specifications and Memory Details
Determining the Software Version
New Hardware Features in Release 15.6(2)SP1
New Software Features in Release 15.6(2)SP1
Pseudowire Redundancy with Uni-directional Active-Active Support
Modified Software Features in Release 15.6(2)SP1
Obtaining Documentation and Submitting a Service Request
First Published Date: November 2016
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.6(2)SP1 and contains the following sections:
The Cisco ASR 901 Series Aggregation Services Router is a cell-site access platform specifically designed to aggregate and transport mixed-generation radio access network (RAN) traffic. The router is used at the cell site edge as a part of a 2G, 3G, or 4G RAN.
The Cisco ASR 901 router helps enable a variety of RAN solutions by extending IP connectivity to devices using Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Node Bs using High Speed Packet Access (HSPA) or Long Term Evolution (LTE), base transceiver stations (BTSs) using Enhanced Data Rates for GSM Evolution (EDGE), Code Division Multiple Access (CDMA), CDMA-2000, EVDO, or WiMAX, and other cell-site equipment.
It transparently and efficiently transports cell-site voice, data, and signaling traffic over IP using traditional T1 and E1 circuits, as well as alternative backhaul networks such as Carrier Ethernet and DSL, Ethernet in the First Mile (EFM), and WiMAX. It also supports standards-based Internet Engineering Task Force (IETF) Internet protocols over the RAN transport network, including those standardized at the Third-Generation Partnership Project (3GPP) for IP RAN transport. Custom designed for the cell site, the Cisco ASR 901 router features a small form factor, extended operating temperature, and cell-site DC input voltages.
Table 1 lists the Cisco ASR 901 1G Router model versions.
Table 2 lists the Cisco ASR 901 10G Router model versions.
Note Some of the Cisco ASR 901 models have port based licensing. For more details, see the Licensing chapter in Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
Table 3 lists the supported system configurations and memory details for the Cisco ASR 901 router:
To determine the image and version of Cisco IOS software running on your Cisco ASR 901 router, log in to the router and enter the show version command in the EXEC mode:
The following example shows output from Cisco ASR 901 router that supports normal IOS software.
The following example shows output from Cisco ASR 901 Series Aggregation Services Router, IPsec enabled Ethernet version.
With upcoming technologies like LTE-TDD, LTE-A CoMP, LTE-MBSFN and Location-based services, eNodeBs (base station devices) are required to be accurately synchronized in time and phase. Having GNSS systems at each node is not only expensive, but also introduces vulnerabilities.
Effective with Cisco IOS Release 15.6(2)SP1, Cisco ASR 901 routers support the G.8275.1 telecom profile. This profile targets accurate time and phase distribution and requires boundary clocks at every node in the network.
For more information, see Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
Pseudowire Redundancy with Uni-directional Active-Active Support allows the pseudowires on both the working and protect circuits remain UP to allow traffic to flow from the upstream.
For more information, see Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
Table 4 and Table 5 shows the SFP modules supported on the Cisco ASR 901 routers:
Table 4 SFPs Supported on the Cisco ASR 901 1G and 10G Routers for 1G Mode
Table 5 SFPs Supported on the Cisco ASR 901 10G Router for 10G Mode
Note For information on how to configure SFPs, see the Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels. Only select severity 3 caveats are listed.
This section contains the following topics:
The Caveats section only includes the bug ID and a short description of the bug. For details on the symptoms, conditions, and workaround for a particular bug you must use the Bug Search Tool.
Use the following link to access the tool: https://tools.cisco.com/bugsearch/search
You will be prompted to log into Cisco.com. After successful login, the Bug Search Tool page opens. Use the Help link in the Bug Search Tool to obtain detailed help.
There are no open caveats for the Cisco ASR 901 router running Cisco IOS Release 15.6(2)SP1.
This section provides information about the resolved caveats for the Cisco ASR 901 router running Cisco IOS Release 15.6(2)SP1.
The following sections describe troubleshooting commands you can use with the router.
Collecting Data for Router Issues
To collect data for reporting router issues, issue the following command:
Collecting Data for ROMMON Issues
To collect data for ROMMON issues, issue the following command while in the EXEC mode:
Note If you contact Cisco support for assistance, we recommend that you provide any crashinfo files stored in flash memory. For more information about crashinfo files, see http://www.cisco.com/en/US/products/hw/routers/ps167/products_tech_note09186a00800a6743.shtml.
Documents related to the Cisco ASR 901 Series Aggregation Services Router include the following:
To access the related documentation on Cisco.com, go to:
For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation.
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