Table of Contents
Release Notes for Cisco ASR 901 Series Aggregation Services Router for CiscoIOSRelease15.4(1)S
Determining the Software Version
New Hardware Features in Release 15.4(1)S
New Software Features in Release 15.4(1)S
EoMPLS/TDM Pseudowire Redundancy over FRR
Ethernet Loopback - Internal Loopback on Bridge-Domain EFPs
Extending QoS over MLPPP Interface
Redundant PTP instances as per G.8265.1
Support for “no service password recovery” command
Modified Software Features in Release 15.4(1)S
Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(1)S
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(1)S and contains the following sections:
Introduction
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 router model versions.
NoteSome of the Cisco ASR 901 models have port based licensing. For more details, see the 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.
System Specifications
Table 2 lists the supported system configurations for the Cisco ASR 901 router:
Memory Details
Table 2 lists the memory available for Cisco ASR 901 router.
New and Changed Information
- New Hardware Features in Release 15.4(1)S
- New Software Features in Release 15.4(1)S
- Modified Software Features in Release 15.4(1)S
New Hardware Features in Release 15.4(1)S
There are no new hardware features in Cisco IOS Release 15.4(1)S.
1588v2 Hybrid Clock
Effective with Cisco IOS Release 15.4(1)S, the PTP hybrid mode is supported for ordinary clock (in slave mode only) and boundary clock.
For more information about this feature, see PTP Hybrid Clock section of the Configuring Clocking feature guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/clocking.html
Dual REP Edge No-Neighbor
Effective with Cisco IOS release 15.4.(1)S, you can configure the non-REP switch facing ports on a single device as dual edge no-neighbor ports. These ports inherit all properties of edge ports, and overcome the limitation of not converging quickly during a failure.
For more information about this feature, see Configuring Resilient Ethernet Protocol feature guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/rep.htmlEoMPLS/TDM Pseudowire Redundancy over FRR
Effective with Cisco IOS Release 15.4(1)S, support was added for EoMPLS/TDM pseudowire redundancy over FRR.
For more information about this feature, see Remote Loop-Free Alternate - Fast Reroute feature guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/remote_lfa-frr.html
Ethernet Loopback - Internal Loopback on Bridge-Domain EFPs
Effective with Cisco IOS Release 15.4(1)S, the Cisco ASR 901 supports internal loopback on Bridge-domain EFPs.
For more information about this feature, see Configuring Ethernet OAM feature guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/oam.htmlIPv4 Multicast
Effective with Cisco IOS Release 15.4(1), IPv4 multicast is supported on the Cisco ASR 901 series routers. The router supports up to 500 multicast IP address entries.
The following featurettes are supported:
- Source Specific Multicast
- Source Specific Multicast (SSM) Mapping
- IGMP Version 1
- IGMP Version 2
- IGMP Version 3
For more information about this feature, see IPv4 Multicast on the Cisco ASR 901 Router feature guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/ipv4_mcast.html
IPv6 Multicast
Effective with Cisco IOS Release 15.4(1), IPv6 multicast is supported on the Cisco ASR 901 series routers.
The following featurettes are supported:
- IPv6 Multicast: Multicast Listener Discovery (MLD) Protocol, Versions 1 and 2
- IPv6 Multicast: PIM Source-Specific Multicast (PIM-SSM)
For more information about this feature, see IPv6 Multicast on the Cisco ASR 901 Router feature guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/ipv6_mcast.html
Extending QoS over MLPPP Interface
Effective with Cisco IOS Release 15.4(1)S, the QoS functionality on the MLPPP interface is extended to support:
For more information about this feature, see Configuring QoS feature guide at the following URL: http://wwww.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/qos.html
Redundant PTP instances as per G.8265.1
PTP redundancy is an implementation on different clock nodes by which the PTP slave clock node interacts with multiple master ports such as grand master, boundary clock nodes, and so on.
A new servo mode is defined under PTP to support high PDV scenarios (when the PDVs exceed G.8261 standard profiles). You should use the servo mode high-jitter command to enable this mode on the PTP slave.
In servo mode, convergence time would be longer than usual, as this mode is meant only for frequency synchronization.
For more information about this feature, see PTP Redundancy section of the Configuring Clocking feature guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/clocking.html
REP over LAG
Effective with Cisco IOS Release 15.4(1)S, the Cisco ASR 901 supports REP over port-channel.
For more information about this feature, see Configuring Resilient Ethernet Protocol feature guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/rep.htmlSPAN
Local SPAN supports a SPAN session entirely within one switch. You can analyze network traffic passing through ports or VLANs by using SPAN to send a copy of the traffic to another port on the switch that has been connected to a network analyzer or other monitoring or security devices.
For more information about this feature, see Configuring Switched Port Analyzer feature guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/span.htmlY.1564 over EVC CrossConnect
Effective with Cisco IOS release 15.4.(01)S, traffic can be generated over cross connect interface.
For more information about this feature, see Configuring Ethernet OAM feature guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/oam.htmlSupport for “no service password recovery” command
Effective with Cisco IOS release 15.4.(01)S, support was added for the “no service password recovery” command.
Modified Software Features in Release 15.4(1)S
There are no modified features in Cisco IOS Release 15.4(1)S.
Supported Hardware
Table 3 and Table 4 shows the SFP modules supported on the Cisco ASR 901 routers:
Note Effective with Cisco IOS release 15.4.(01)S, the following changes are available on the Cisco ASR 901 series routers.
- 10G SFPs inserted into 1GE port provides 1GE speed.
- 10G SFPs inserted into 10GE port without a valid license provides 1GE speed.
Table 3 SFPs Supported on the Cisco ASR 901 1G and 10G Routers for 1G Mode
Table 4 SFPs Supported on the Cisco ASR 901 10G Router for 10G Mode
NoteFor information on how to configure SFPs, see the For information on how to configure SFPs, see the Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
Caveats
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:
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 Cisco.com. After successful login, the Bug Search Tool page opens. Use the Help link in the Bug Search Tool to obtain detailed help.
Open Caveats
This section provides information about the open caveats for the Cisco ASR 901 router running Cisco IOS Release 15.4(1)S.
Resolved Caveats
This section provides information about the resolved caveats for the Cisco ASR 901 router running Cisco IOS Release 15.4(1)S.
Troubleshooting
The following sections describe troubleshooting commands you can use with the Cisco ASR 901 Series Aggregation Services 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:
NoteIf 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 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.
Related Documentation
Documents related to the Cisco ASR 901 Series Aggregation Services Router include the following:
- Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
- Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
- Regulatory Compliance and Safety Information for Cisco ASR 901 Series Aggregation Services Routers
- Cisco ASR 901 Series Aggregation Services Router Series MIB Specifications Guide
To access the related documentation on Cisco.com, go to:
http://www.cisco.com/en/US/partner/products/ps12077/tsd_products_support_series_home.html
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
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Release Notes for Cisco ASR 901 Aggregation Series Router for Cisco IOS Release 15.4(1)S