Table of Contents
Release Notes for Cisco ASR 901 Series Aggregation Services Router for CiscoIOSRelease15.4(2)S
System Specifications and Memory Details
Determining the Software Version
New Hardware Features in Release 15.4(2)S
New Software Features in Release 15.4(2)S
Modified Software Features in Release 15.4(2)S
Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(2)S
First Published Date: March 2014
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(2)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 1G Router model versions.
Table 2 lists the Cisco ASR 901 10G 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 and Memory Details
Table 3 lists the supported system configurations and memory details for the Cisco ASR 901 router:
Determining the Software 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.
New and Changed Information
- New Hardware Features in Release 15.4(2)S
- New Software Features in Release 15.4(2)S
- Modified Software Features in Release 15.4(2)S
New Hardware Features in Release 15.4(2)S
Cisco ASR 901 Series Aggregation Services Router, IPsec enabled Ethernet version
New versions of the Cisco ASR 901 10G Routers are introduced from Cisco IOS Release 15.4(2)S. The product identifiers (PIDs) for these variants are A901-6CZ-FS-A and A901-6CZ-FS-D. These router variants support IP Security and Network Address Translation features.
For more information about the new router variants, see the Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide feature guide at the following URL: http://www.cisco.com/c/en/us/td/ docs/wireless/asr_901/Hardware/10G_Guide/10G_Guide.html
For more information about IP Security and Network Address Translation features, see the Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide guide at the following URL: http:// www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg.html
New Software Features in Release 15.4(2)S
Effective with Cisco IOS release 15.4 (2) S, the Cisco ASR 901 Router supports configuring EVC dot1ad encapsulation with xconnect.
For more information about this feature, see the Configuring EoMPLS feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_ chapter_01111.html
Effective with Cisco IOS release 15.4 (2)S, the Cisco ASR 901 Router supports ACL-based QoS on Layer 4. This feature allows you to configure the layer 3 or layer 4 options while configuring the ACL for QoS on ingress only. Layer 3 or layer 4 options like ToS, source port, and destination port are supported.
For more information about this feature, see the Configuring QoS feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_ 011000.html
Effective with Cisco IOS Release 15.4 (2)S, the Cisco ASR 901 Router supports Auto-IP feature.
For more information about this feature, see the Auto-IP feature guide at the following URL: www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_ipv4/configuration/xe-3s/ipv4-xe-3s-book/ipv4-xe-3s-book_ chapter_011.html
The BCP Support on MLPPP feature enables forwarding of Ethernet frames over serial networks, and provides extension of enterprise LAN backbone traffic through an MLPPP WAN network.
For more information about this feature, see the BCP Support on MLPPP feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_ chapter_0101110.html
Effective with Cisco IOS Release 15.4 (2)S, the Cisco ASR 901 Router supports BGP - Accumulated IGP feature. The BGP Accumulated IGP feature is an optional non-transitive Border Gateway Protocol (BGP) path attribute. The attribute type code for the accumulated interior gateway protocol (AIGP) attribute is assigned by the Internet Assigned Numbers Authority (IANA). The value field of the AIGP attribute is defined as a set of type, length, value (TLV) elements. The AIGP TLV contains the AIGP metric.
For more information about this feature, see the BGP - Accumulated IGP feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/bgp-accumulated-igp.html
The ITU-T G.8032 Ethernet Ring Protection Switching feature implements protection switching mechanisms for Ethernet layer ring topologies. This feature uses the G.8032 Ethernet Ring Protection (ERP) protocol, defined in ITU-T G.8032, to provide protection for Ethernet traffic in a ring topology, while ensuring that no loops are within the ring at the Ethernet layer. The loops are prevented by blocking traffic on either a predetermined link or a failed link.
For more information about this feature, see the Configuring ITU-T G.8032 Ethernet Ring Protection Switching feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_0101111.html
IGMP snooping allows a router to examine IGMP packets and make forwarding decisions based on their content. Using IGMP snooping, the router intercepts IGMP messages from the host and updates its multicast table accordingly.
For more information about this feature, see the IGMP Snooping section on the IPv4 Multicast feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_0101010.html
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.
NoteThis feature is supported only on the A901-6CZ-FS-D and A901-6CZ-FS-A PIDs of the Cisco ASR 901 10G Router. This feature is supported only on the A901-6CZ-FS-D and A901-6CZ-FS-A PIDs of the Cisco ASR 901 10G Router.
For more information about this feature, see the IP Security feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_0101101.html
IPv6 Services: Extended Access Control Lists
The standard ACL functionality in IPv6 is similar to standard ACLs in IPv4. Access lists determine what traffic is blocked and what traffic is forwarded at router interfaces and allow filtering based on source and destination addresses and inbound interface. Each access list has an implicit deny statement at the end. IPv6 ACLs are defined and their deny and permit conditions are set using the ipv6 access-list command with the deny and permit keywords in global configuration mode.
For more information about this feature, see the Configuring QoS feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_011000.html
MLD is a protocol used by IPv6 multicast routers to discover the presence of multicast listeners (nodes looking to receive IPv6 multicast packets) on its directly attached links, and to discover which multicast packets are of interest to neighboring nodes.
For more information about this feature, see the MLD Snooping section on the IPv6 Multicast feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_0101011.html
Effective with Cisco IOS Release 15.4(2)S, you can configure Network Address Translation (NAT) for IP address conservation. This module also provides information about the benefits of configuring NAT for IP address conservation.
NoteThis feature is supported only on the A901-6CZ-FS-D and A901-6CZ-FS-A PIDs of the Cisco ASR 901 10G Router. This feature is supported only on the A901-6CZ-FS-D and A901-6CZ-FS-A PIDs of the Cisco ASR 901 10G Router.
For more information about this feature, see the Configuring NAT for IP Address Conservation feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_0110000.html
The TWAMP RFC Compliance feature supports RFC 5357 which specifies a Two-Way Active Measurement Protocol (TWAMP), based on the One-way Active Measurement Protocol (OWAMP), that adds two-way or round-trip measurement capabilities.
For more information about this feature, see the IP SLAs TWAMP Responder feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/xe-3s/sla-xe-3s-book/sla_twamp.html
Modified Software Features in Release 15.4(2)S
Licensing information about the new variants of the Cisco ASR 901 10G Router (A901-6CZ-FS-A and A901-6CZ-FS-D) is added to the licensing document.
For more information about licensing information for the new router variants, see the Licensing feature guide at the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_010.html
Supported Hardware
Table 4 and Table 5 shows the SFP modules supported on the Cisco ASR 901 routers:
- 10G SFPs inserted into 1GE port provides 1GE speed.
- 10G SFPs inserted into 10GE port without a valid license provides 1GE speed.
- 100M SFP works only with no negotiation auto command.
- Effective with Cisco IOS Release 15.4(1)S, if 1G SFP is used to connect a 10G port to a 1G port, you do not have to explicitly configure the no negotiation auto command to bring up the link.
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
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(2)S.
Resolved Caveats
This section provides information about the resolved caveats for the Cisco ASR 901 router running Cisco IOS Release 15.4(2)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:
Cisco ASR 901 1G Router home page: http://www.cisco.com/en/US/partner/products/ps12077/tsd_products_support_series_home.html
Cisco ASR 901 10G Router home page: http://www.cisco.com/c/en/us/support/routers/asr-901-10g-series-aggregation-services-routers/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(2)S