Table of Contents
Release Notes for Cisco ASR 901 Series Aggregation Services Router for CiscoIOSRelease15.4(3)S
System Specifications and Memory Details
Determining the Software Version
New Hardware Features in Release 15.4(3)S
New Software Features in Release 15.4(3)S
1588 PTP Best Master Clock Algorithm
BFD Support for Multicast (PIM)
DHCP Snooping with Option-82 on EVC
G.8032 and Psuedo Preemption Support
PTP Loopback Interface VRF Awareness
Modified Software Features in Release 15.4(3)S
Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(3)S
Last Updated Date: November 2014
First Published Date: July 2014
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.4(3)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.
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.
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(3)S
- New Software Features in Release 15.4(3)S
- Modified Software Features in Release 15.4(3)S
1588 PTP Best Master Clock Algorithm
1588 PTP Best Master Clock Algorithm (BMCA) is used to select the master clock on each link, and ultimately, select the grandmaster clock for the entire PTP domain. BCMA runs locally on each port of the ordinary and boundary clocks, and selects the best clock on the link by comparing the local data sets with the received data from the announce messages.
For more information about this feature, see Configuring Clocking 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_010110.html
BFD Support for Multicast (PIM)
The Bidirectional Forwarding Detection (BFD) Support for Multicast (PIM) feature, also known as PIM BFD, registers PIM as a client of BFD.
PIM can then utilize BFD to initiate a session with an adjacent PIM node to support BFD's fast adjacency failure detection in the protocol layer.
For information on BFD PIM implementation on IPv4, see 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
For information on BFD PIM implementation on IPv6, see 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
CFM CCM Hardware Offload
Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901 Router supports CFM hardware offloading. Configuring Ethernet CFM for offload CFM session requires configuring the CFM domain with the supported offload CCM intervals 3.3ms,10ms, and 100ms. You can optionally configure the sampling rate for the offload cfm sessions and the default sampling rate is 20000.
For more information about this feature, see Configuring Ethernet OAM 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_01010.html
DHCP Snooping with Option-82 on EVC
DHCP Snooping is one of the switch features on the Cisco ASR 901 Series Routers that will be supported while functioning as a Layer 2 switch.
For more information about this feature, see the Configuring Ethernet Virtual Connections 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_01000.html
G.8032 and Psuedo Preemption Support
Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901 Router supports G.8032 on port-channel interface.
For more information about this feature, see 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
IP Multicast VRF Lite
The IP Multicast VRF Lite feature provides IPv4 multicast support for multiple virtual routing/forwarding contexts (VRFs). The IPv4 Multicast VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF.
For more information about this feature, see 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
IPv6 Multicast VRF Lite
The IPv6 Multicast VRF Lite feature provides IPv6 multicast support for multiple virtual routing/forwarding contexts (VRFs). The IPv6 Multicast VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF.
For more information about this feature, see 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
PTP Loopback Interface VRF Awareness
PTP support over virtual routing and forwarding (VRF) instance-enabled interfaces allows the PTP loopback interface to be part of VRF rather than maintaining the loopback addresses in the global routing table. This enables the service providers to reuse the same IP address for multiple loopback interfaces by configuring PTP loopback under VRF.
For more information about this feature, see Configuring Clocking 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_010110.html
PTP over Ethernet
Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901 Router supports PTP over Ethernet.
For more information about this feature, see Configuring Clocking 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_010110.html
Support for Unframed E1
Effective with Cisco IOS Release 15.4(3)S, support was introduced for unframed E1, enabling the use of timeslot 0 for data to utilize the full capacity (2.048Mbps) of E1 controllers, against the previous maximum bandwidth limit of 1.984Mbps.
For more information about this feature, see the following URL: http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_010100.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 only 1GE speed.
- 100M SFP works only with no negotiation auto command.
- 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.
- Effective with Cisco IOS Release 15.4(3)S, the auto-select feature is supported on 100M SFPs. However, this feature is not supported on combo ports.
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
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(3)S.
Resolved Caveats
This section provides information about the resolved caveats for the Cisco ASR 901 router running Cisco IOS Release 15.4(3)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:
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.
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(3)S