Table Of Contents
Release Notes for Cisco 4G LTE WWAN EHWICs
First Published: March 16, 2012Last Updated: September 9, 2013
This Release Notes document describes the Cisco® Fourth-Generation Long Term Evolution Wireless WAN Enhanced High-Speed WAN Interface Cards (Cisco 4G LTE WWAN EHWICs). This document should be used with the documents listed in the "Related Documentation" section.
This document is updated as needed. To ensure that you have the latest version of the Release Notes document, go to http://www.cisco.com/en/US/partner/products/ps10083/tsd_products_support_series_home.html. Choose Release and General Information > Release Notes, and locate the latest release notes pertaining to your release.
The Cisco 4G LTE WWAN EHWICs are the first, enterprise-class 4G Multimode LTE WWAN solution for Cisco Integrated Services Routers Generation 2 (ISR G2). The EHWICs can support 3GPP Release 8 LTE standards. Cisco 4G Multimode LTE WWAN EHWICs also support 3GPP-based and 3GPP2-based 3G and 2G access technologies and seamless handoff from 2G and 3G to 4G LTE. The 4G LTE mobile specifications provide multi-megabit bandwidth, more efficient use of the radio network, latency reduction, and improved mobility. This feature is supported on the Cisco ISR G2 modular platform, which delivers secure data, voice, video, and mobility services. The Cisco 4G LTE WWAN EHWICs are single-wide EHWICs supported on the Cisco 819 Series ISRs, Cisco 1900 Series ISRs, Cisco 2900 Series ISRs, and Cisco 3900 Series ISRs. The EHWICs operate over the over 4G LTE and 3G cellular networks.
Summary of Changes Cisco IOS Release 15.2(4)M3 and Later
For Cisco IOS Release 15.2(4)M3 image or later, the external link recovery script is not required. Ensure that the link recovery script is removed from Flash before upgrading to Cisco IOS Release 15.2(4)M3 or later, which also contains an embedded modem link recovery mechanism that eliminates the need for link recovery scripts. Ensure that the cell_recovery_vx.tcl and cel_cli_vx.tcl scripts are removed from router flash, where x stands for the script version number that is in use, for example, cell_recovery_v2.tcl and cel_cli_v2.tcl.
The Cisco IOS Release 15.2(4)M3 or later image also requires a mandatory upgrade to the latest versions of modem firmware. The new modem firmware versions contain significant modem stability enhancements. Cisco IOS Release 15.2(4)M3 or later should not be installed without upgrading the LTE eHWIC modem firmware to the appropriate 3.x release. The following are the new firmware versions supported on the LTE SKUs in Cisco IOS Release 15.2(4)M3 or later:
•EHWIC-4G-LTE-V : 188.8.131.52
•EHWIC-4G-LTE-A : 184.108.40.206
•EHWIC-4G-LTE-G : 220.127.116.11
Cisco IOS Release 15.2(4)M3 or later also includes an upgrade to a newer and more stable version of vendor-provided SDK Version 1.8.0 that provides support for the new modem firmware.
The modem firmware files and the associated documentation for upgrading the modems are available at the following locations:
Cisco 4G LTE WWAN EHWICs require platforms with 512 MB of SDRAM to run the Cisco IOS software and the Linux operating system.
The latest certified firmware version for your carrier Cisco IOS is available at http://www.cisco.com/en/US/prod/collateral/modules/ps5949/ps7272/datasheet_c78-710314.html.
Table 1 shows the antennae supported in Cisco 4G LTE WWAN EHWICs.
Note The Cisco 4G Indoor/Outdoor Active GPS Antenna (GPS-ACT-ANTM-SMA) will be available at a later date.
Note The -N antennae, cables, and lightning arrestors can be ordered only as spare; they work together as an accessories bundle. For details on -N accessories, refer to Table 1-3 in the Chapter "Cisco CGR 1000 and 2000 Series Connected Grid Antennas Overview" of the Connected Grid Antennas Installation Guide.
Table 2 shows cables and accessories supported in Cisco 4G LTE WWAN EHWICs.
For ISRs with EHWIC-4G-LTE-V and C819(H)G-4G-V-K/9, the use of Cisco IOS Release 15.2(4)M3 or later requires LTE modem firmware 18.104.22.168.
Note Do not use Cisco IOS Release 15.2(4)M3 or later on ISRs with LTE eHWICs until the LTE modem is upgraded.
Cisco IOS Release 15.2(4)M3 or later includes Verizon Wireless LTE modem drivers that operate with the latest MC7750 LTE modem firmware. Due to backward compatibility issues with the existing LTE modem firmware (22.214.171.124), Cisco IOS Release 15.2(4)M3 or later should be used only after upgrading the existing LTE modem firmware to the Release 126.96.36.199, or with the new EHWIC-4G-LTE-V and C819(H)G-4G-V-K/9 units with firmware 188.8.131.52 factory loaded.
Check the LTE modem firmware using the Cisco IOS command show cellular 0/x/0 hardware (for EHWIC-4G-LTE-V, with x being the EHWIC slot number) or the show cellular 0 hardware command (for C819(H)G-4G-V).
The latest certified firmware version for your carrier having Cisco IOS compatibility is available at http://www.cisco.com/en/US/prod/collateral/modules/ps5949/ps7272/datasheet_c78-710314.html.
The EHWICs will be supported only in the following ISR G2 platforms that provide EHWIC slots:
•Cisco 819 Series ISRs
•Cisco 1900 Series ISRs
•Cisco 2900 Series ISRs
•Cisco 3900 Series ISRs
•Cisco 3900e Series ISRs
Table 3 lists the Cisco 4G WWAN EHWICs supported on Cisco ISR G2 Modular Platforms.
Feature Set Tables
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 4 lists the feature information for Cisco 4G LTE WWAN EHWICs.
Table 5 shows the hardware SKUs for Cisco 4G LTE WWAN EHWICs.
Table 5 Cisco 4G EHWICs by Mode, Operating Region, and Frequencies
SKU Mode Operating Region Frequency Band Description
700 MHz (band 13) for LTE
Verizon LTE (using Sierra Wireless MC7750)
HSPA, UMTS, EDGE, and GPRS
700 MHz (band 17), AWS (band 4), and 2100 MHz (band 1) for LTE
800, 850, 1900, and 2100 MHz for UMTS, HSPA+, and HSPA
850, 900, 1800, and 1900 MHz GSM, EDGE, and GPRS
AT&T LTE (using Sierra Wireless MC7700)
LTE—HSPA+, HSPA, UMTS, EDGE, and GPRS
800 MHz (band 20), 900 MHz (band 8), 1800 MHz (band 3), 2100 MHz (band 1), 2600 MHz (band 7) for LTE
900 and 2100 MHz for UMTS, HSPA+, and HSPA
900, 1800 and 1900 MHz for GSM, EDGE, and GPRS
Global LTE (using Sierra Wireless MC7710)
1 DOrA = Evolution Data Only (EVDO) Revision A
2 CDMA = Code Division Multiple Access
3 1xEVDO = Evolution Data Only
New Software Features in 15.3(3)M
•SMS initiated data callback
•3G/4G Simple Network Management Protocol (SNMP) MIB.
Note GPS is not supported in Cisco IOS Release 15.3(3)M. GPS will be supported in Cisco IOS Release 15.3(3)M1.
Software Features in Release 15.2(4)M3
•MIPv4, NEMOv4 and RFC 3025
•IPv4 subnet behind the LTE User Equipment (UE) interface
•eHRPD, which allows seamless handoff between LTE and 3G services (in EHWIC-4G-LTE-V only)
•Seamless handoff between LTE and the eHRPD network (in EHWIC-4G-LTE-V only)
•Support for the UMTS service as a fallback option from the LTE service (in EHWIC-4G-LTE-A and EHWIC-4G-LTE-G only)
•Seamless handoff between the LTE and the UMTS service (in EHWIC-4G-LTE-A and EHWIC-4G-LTE-G only)
•Over the Air Device Management (OTA-DM) including wireless configuration Firmware over the Air (FOTA) (in EHWIC-4G-LTE-V only)
Limitations and Restrictions
•Currently, cellular networks support only outgoing calls.
•Throughput—Due to the shared nature of wireless communications, the experienced throughput varies depending on the number of active users or congestion in a given network.
•Cellular networks have higher latency compared to wired networks. Latency rates depend on the technology and carrier. Latency may be higher because of network congestion.
•Any restrictions that are part of the terms of service from your carrier.
•Public Land Mobile Network (PLMN) CLIs exist but the feature is not supported in this release.
•SMS—Only one text message up to 160 characters to one recipient at a time is supported. Larger texts are automatically truncated to the proper size before being sent.
•For the router that runs the SNMP agent, you must configure appropriate access control (for example, SNMP-server community) using the Cisco IOS CLI for the NMS and agent to work properly.
•It is strongly recommended that you configure SNMP V3 with authentication/privacy when implementing SNMP SET operation.
•GPS is not supported in Release 15.3(3)M.
Open Caveats—Release 15.3(3)M
Modem Type: All LTE modems.
Symptom: Inablility to configure the cellular profile username and password through the CLI if a 32 character password is required. This problem will be fixed in 15.3(3)M1.
Condition: The username and password configuration issue occurs when a 4G modem connects in UMTS mode to a 3G network.
Modem Type: AT&T and Global LTE.
Symptom: The cellular interface may reset after deleting SMS messages from a full SMS SIM.
Condition: When the system sends traffic over cellular link, the LTE modem continues to receive SMS messages even though the SIM card has reached its full capacity.
Workaround: Setup the FTP server path for auto SMS archiving when the SIM/USIM is full, or delete SMS messages before the SIM is full.
Modem Type: Verizon
Symptom: Low throughput is seen when uplink carries traffic.
Condition: Send IMIX traffic rate 16 Mbps and greater to the uplink.
Modem Type: All LTE modems.
Symptom: UUT SMS special characters sent does not match receiving device.
Condition: When a special character (`\', `$', `@') is sent by way of SMS from different carriers.
Modem Type: All LTE modems
Symptom: Modem becomes unresponsive.
Condition: This symptom is observed when a small packet traffic (64 B) goes downlink at the rate of 35 Mb/s.
Workaround: In the context of small packet traffic (64 B), lower the downlink rate to 25 Mb/s.
Modem Type: AT&T
Symptom: The MC7700 modem fails to ping to the network.
Condition: This symptom is observed in the context of pings when a packet size of 1045 B or greater is present and has the Access Point Name (APN) set to Broadband.
Workaround: Use packet size of 1044 B or smaller.
Resolved Caveats—As of Release 15.3(3)M and Later
Table 6 lists the resolved caveats for the Cisco 4G LTE WWAN EHWICs.
•Cisco 4G LTE Wireless WAN EHWIC
Provides instructions for installing and upgrading Cisco 4G LTE WWAN EHWICs.
•Configuring Cisco 4G LTE Wireless WAN EHWIC
Provides instructions for configuring Cisco 4G LTE WWAN EHWICs.
•Open Source License—Open Source Used In Cisco 4G-TE Wireless WAN EHWIC Release 1.0
Provides information about the open source licenses used in Cisco 4G LTE WWAN EHWICs.
Obtaining Documentation and Submitting a Service Request
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This document is to be used in conjunction with the documents listed in the Related Documentation section.
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