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Release Notes for Cisco ASR 901 Series Aggregation Services Router for CiscoIOSRelease15.5(3)S
System Specifications and Memory Details
Determining the Software Version
New Hardware Features in Release 15.5(3)S
New Software Features in Release 15.5(3)S
Modified Software Features in Release 15.5(3)S
Obtaining Documentation and Submitting a Service Request
First Published Date: July 2015
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.5(3)S 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:
Cisco ASR 901 Series Aggregation Services Router TDM version
Cisco ASR 901 Series Aggregation Services Router, Ethernet version
Cisco ASR 901 Series Aggregation Services Router, IPsec enabled Ethernet version
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.
BCM Parity Errors feature detects and recovers from parity errors which may get generated on Cisco ASR901 routers due to environmental conditions.
These parity errors, when get detected, generate following type of logs on the device –
unit 0 <TableName> entry <entryId> parity error
This feature automatically recovers parity error on a subset of the table. Therefore, if parity errors in above format are observed on some table, then please contact Cisco TAC for assistance.
This feature uses the new IP multicast address 188.8.131.52 to send hello packets instead of the multicast address of 184.108.40.206, used by HSRP version 1. This new multicast address allows CGMP leave processing to be enabled at the same time as HSRP.
HSRP version 2 permits an expanded group number range, 0 to 4095, and consequently uses a new MAC address range 0000.0C9F.F000 to 0000.0C9F.FFFF. The expanded group number range was changed to allow the group number to match the VLAN number on sub interfaces. This feature allows the router to advertise and learn millisecond timer values. HSRP version 2 packet includes a 6-byte identifier field that is used to uniquely identify the sender of the message (usually populated with interface MAC address).
For detailed information about this feature, see HSRP Version 2 feature at the following URL:
This feature provides the capability to filter packets at a fine granularity and allows the permission or denial of the packets based on the MAC source and destination addresses. MAC Access Control Lists (ACLs) are ACLs that filter traffic using information in the layer 2 header of each packet. This ability to filter packets in a modular and scalable way is important for both network security and network management.
For more information about this feature, see Layer 2 MAC ACLs feature guide at the following URL:
This feature introduces support for IP Security (IPsec) traffic to travel through Network Address Translation (NAT) or Port Address Translation (PAT) points in the network by addressing many known incompatibilities between NAT and IPsec. This feature encapsulates the IPsec packets in a User Datagram Protocol (UDP) wrapper that allows the packets to travel across NAT devices.
For information about this feature, see NAT Traversal feature guide at the following URL:
Effective from Cisco IOS Release 3.16, the Cisco ASR 901 Router supports PTP debugging over GRE tunnel feature.
PTP Debugging over GRE Tunnel feature enables the transport of PTP debugging information and PTP packets originated by the device through a GRE tunnel.
For more information about this feature, see PTP Debugging over GRE Tunnel feature guide at the following URL:
Effective from Cisco IOS Release 3.16, the Cisco ASR 901 Router supports Smart Licensing feature.
Smart Licensing is software based licensing end-to-end platform that consists of several tools and processes to authorize customers the usage and reporting of the Cisco products.
For more information about this feature, see Smart Licensing feature guide at the following URL:
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.
The Cisco ASR 901 router supports the following MIBs:
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.
This section provides information about the open caveats for the Cisco ASR 901 router running Cisco IOS Release 15.5(3)S.
Incorrect P-bit for CPU originated packets once EoMPLS VC on.
ASR901-Operational status for Fan and power module shown as critical.
This section provides information about the resolved caveats for the Cisco ASR 901 router running Cisco IOS Release 15.5(3)S.
" permit any any " configuration should override default "deny any any" FP entry.
Extra FP entry consumed in TCAM after removing all ACE entries from ACL.
Extra IFP created by ACL for 'default deny rule' when configuration explicitly.
TCAM exhaustion for V4 and V6 Multicast needs proper handling.
ASR901 IGMP: Reports received on an interface and interface is default, then 901 is generating error messages.
MLD Snooping: Wrong configuration command, report-suppression instead of listener-msg.
Observing error messages when defaulting router interface receiving IGMP.
Console logs are printed on 1st unauthenticated VTY session.
Exceed action is not working in policer having match cos as 2nd statement.
Missing or illegal IP address messages seen on reloading ASR901.
ASR901: AIS on TDM AC does not trigger L-bit to be set in SAToP CW.
Tracebacks seen at %SYS-2-BADSHARE: Bad refcount in datagram_done.
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 at: http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html.
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