Release Notes for Cisco ASR 901S Series Aggregation Services Router for Cisco IOS Release 15.4(3)S
This release notes is for the Cisco ASR 901S Series Aggregation Services Router for Cisco IOS Release 15.4(3)S and contains the following sections:
The Cisco ASR 901S Series Aggregation Services Routers are a family of small cell routers designed to support backhaul in deployment of small cell radios. The ASR 901S routers are small-form-factor, environmentally hardened (IP65 rated), low power, and cost effective. They complement the Cisco ASR 901 as part of the Cisco end-to-end mobile backhaul solution and transparently integrate into existing operational environments. A Cisco ASR 901S router prioritizes and processes small cell-site voice, data, and signaling traffic as part of the Cisco Unified RAN Backhaul solution for reliable transport across any available backhaul networks.
The ASR 901S routers can be installed in the outside plant (OSP) without an enclosure. These routers can be easily deployed in challenging locations such as on lamp posts, telephone poles, and sides of walls. By using the Cisco ASR 901S, operators can reduce backhaul operating costs, simplify deployment and provisioning, and enhance their profit opportunities with premium mobile and Ethernet services.
The following table lists the Cisco ASR 901S router chassis models.
Table 1 Cisco ASR 901S Router Models
Chassis Product ID
4 external SFP ports + 1 gland interface for internal ports
3 external SFP ports + 1 external copper (Cu) port + 1 gland interface for internal ports
2 external SFP ports + 2 external Cu ports + 1 gland interface for internal ports
3 external SFP ports + 1 gland interface for internal ports, 1 sec holdover for 1 power over Ethernet plus (POE+)
2 external SFP ports + 1 external Cu port + 1 gland interface for internal ports, 1 sec holdover for 1 POE+
Determining the Software Version
To determine the image and version of Cisco IOS software running on your Cisco ASR 901S FA router, log in to the router and enter the show version command in the EXEC mode:Router#show version Cisco IOS Software, 901 Software (ASR901-UNIVERSALK9-M), Version 15.4(3)S, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2014 by Cisco Systems, Inc. Compiled Sun 27-Jul-14 12:26 by prod_rel_team ROM: System Bootstrap, Version 15.4(3r)S3, RELEASE SOFTWARE (fc1) AGORA uptime is 2 minutes System returned to ROM by power-on System restarted at 17:54:29 UTC Wed Jul 30 2014 System image file is "tftp://22.214.171.124//auto/tftpboot/jvaruvel/3.13/asr901-universalk9-mz.154-3.S.bin" Last reload reason: Reload Command This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately. A summary of U.S. laws governing Cisco cryptographic products may be found at: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html If you require further assistance please contact us by sending email to firstname.lastname@example.org. License Level: AdvancedMetroIPAccess License Type: Permanent Next reload license Level: AdvancedMetroIPAccess Cisco A901S-4SG-F-D (P2020) processor (revision 1.0) with 393216K/131072K bytes of memory. Processor board ID FOC1738N74Q P2020 CPU at 800MHz, E500v2 core, 512KB L2 Cache 1 WiFi management interface 1 External Alarm interface 1 FastEthernet interface 6 Gigabit Ethernet interfaces 1 terminal line 256K bytes of non-volatile configuration memory. 98304K bytes of processor board System flash (Read/Write) Configuration register is 0x2102 Router#
New and Changed Information
New Hardware Features in Release 15.4(3)S
New Software Features in Release 15.4(3)S
The Cisco ASR 901S router supports a majority of the software features supported on the Cisco ASR 901 routers. For information about the new Cisco ASR 901 features for Cisco IOS Release 15.4(3), see Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(3)S.
The following new feature is supported on the ASR 901S router:
Wi-Fi Management Interface
Effective with Cisco IOS Release 15.4(3)S, support was provided for the Wi-Fi management interface on the Cisco ASR 901S router. The Wi-Fi management interface can be disabled or enabled using the Cisco IOS CLIs.
For more information about this feature, see Configuring the Wi-Fi Management Interface in the Cisco ASR 901S Series Aggregation Services Router Software Configuration Guide.
The IP Security feature enables you to configure the Internet Key Exchange (IKE) protocol for basic IP Security (IPsec) Virtual Private Networks (VPNs). IKE is a key management protocol standard that is used in conjunction with the IPsec standard. IPsec is an IP security feature that provides robust authentication and encryption of IP packets.
For more information about this feature, see the IP Security feature guide at the following URL: IP Security in the Cisco ASR 901S 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:
Only ASR 901S-specific caveats are covered in this section. For a complete list of caveats, see the Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(3)S.
Bug Search Tool
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 www.cisco.com. After successful login, the Bug Search Tool page opens.
Use the Help link in the Bug Search Tool to obtain detailed help.
This section provides information about the open caveats for the Cisco ASR 901S router running Cisco IOS Release 15.4(3)S.
When unsupported SFP is inserted a error message indicating module disabled, NOT_SUPPORTED is displayed as expected. However, while removing the SFP, i2c slave device not found error messages is seen.
When plugging in and plugging out the cable multiple times on the PoE ports, the following console log is seen on the ASR 901S FA router: ERR:I2C while i2c write @reg_addr 2A !!
Network LED is switched OFF with line protocol down at fa0/0 port.
'sh env' output is taking approximately 1 minute to update after reload.
This section provides information about the resolved caveats for the Cisco ASR 901S router running Cisco IOS Release 15.4(3)S.
Continuous traceback and CPU hog messages are seen on the Cisco ASR 901S router on loading unsupported software image.
Cisco ASR 901S router reloads when booted up with Cisco IOS Release 15.3(3)S image.
'no service password recovery' does not function properly on the Cisco ASR 901S router.
Boot failed on the Cisco ASR 901S router when loaded with the Cisco IOS XE 3.11 image due to extra space character in the PID.
Power cycle during write memory operation falls back to the default configuration mode on the ASR 901S router.
Network LED should also function as per Wi-Fi management interface port status.
The following sections describe troubleshooting commands you can use with the Cisco ASR 901S Series Aggregation Services Router.
Collecting Data for Router Issues
Collecting Data for ROMMON IssuesTo collect data for ROMMON issues, issue the following command while in the EXEC mode:
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.
- Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
- Cisco ASR 901S Series Aggregation Services Router Software Configuration Guide
- Cisco ASR 901S Series Aggregation Services Router Command Reference Guide
- Regulatory Compliance and Safety Information for Cisco ASR 901S Series Aggregation Services Routers
To access the related documentation on Cisco.com, go to:
Services and Support
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html.
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