Table Of Contents
Release Notes for Cisco MWR 1941-DC-A Mobile Wireless Edge Router for Cisco IOS Release 12.4(2)MR
January 4, 2008
Cisco IOS Release 12.4(2)MR
These release notes are for the Cisco MWR 1941-DC-A Mobile Wireless Edge Router for Cisco IOS Release 12.4(2)MR. Cisco IOS Release 12.4(2)MR is required to deploy the Cisco MWR 1941-DC-A router in a RAN Optimization solution.
These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode and related documents.
For a list of the software caveats that apply to Cisco IOS Release 12.4(2)MR, see the "Caveats in Cisco IOS Release 12.4(2)MR" section. To review the release notes for Cisco IOS Release 12.4, go to www.cisco.com and click Technical Support and Documentation. Select Cisco IOS Software. Then, click Cisco IOS Software Release 12.4 Mainline from the Cisco IOS Software list menu. Next, under the General menu item, click Release Notes > Cross-Platform Release Notes for Cisco IOS Release 12.4, Part V:Caveats.
This document contains the following sections:
With Cisco IOS Release 12.4(2)MR, the Cisco MWR 1941-DC-A router can be used in a Cisco Radio Access Network (RAN) Optimization (RAN-O) environment. The Cisco RAN-O feature provides Global System for Mobile Communication (GSM) Abis Optimization over IP and Universal Mobile Telecommunication System (UMTS) Iub Optimization over IP. This feature enables bandwidth efficient transport of GSM and UMTS traffic between the Base Transceiver Station (BTS) and the Base Station Controller (BSC) in GSM RANs and between Node B and Radio Network Controllers (RNC) in UMTS RANs. This results in significant reductions in operating expenditures to the mobile wireless operator and enables new revenue generating services for the future.
System Configuration Requirements
When being implemented in an RAN-O solution, the Cisco MWR 1941-DC-A router requires the following system configuration:
•Cisco IOS 12.4(2)MR software be installed.
The MWR 1941-DC-A router must be configured to operate in standalone mode. The standalone option must be configured from redundancy mode.
To manually set the relays to open or closed, do the following starting in global configuration mode:
Step 1. Enter redundancy mode.Router(config)# redundancy
Step 2. Enter the y-cable mode.Router(config-r)# mode y-cable
Step 3. Specify that the router is to be used as a stand-alone device. This command closes the relays.Router(config-r-y)# standalone
Step 4. Exit y-mode configuration mode.Router(config-r-y)# exit
To verify the status of the relays on an MWR 1941-DC-A router, use the show controllers command.
Table 1 Memory Recommendations for the Cisco IOS Release 12.4(2)MR
Platform Software Image Flash
Cisco MWR 1941-DC-A Mobile Wireless Edge Router
128 MB Flash
256 MB DRAM
Determining the Software Version
To determine the image and version of Cisco IOS software running on your Cisco MWR 1941-DC-A router, log in to the Cisco MWR 1941-DC-A and enter the show version EXEC command:router> show versionCisco Internetwork Operating System SoftwareIOS (tm) 1900 Software (MWR1941-IPRAN-MZ), Version 12.4(2)MR, EARLY DEPLOYMENT RELEASE SOFTWARE (fcl)
Upgrading to a New Software Release
For general information about upgrading to a new software release, refer to Software Installation and Upgrade Procedures located at the following URL:
New Features in the Cisco IOS Release 12.4(2)MR Software
With Cisco IOS Release 12.4(2)MR, the MWR 1941-DC-A router supports the following Cisco network modules and interface cards:
Cisco 2-port T1/E1-RAN Interface Card (VWIC)
•Cisco 2-port T1/E1-RAN Interface Card: VWIC-2T1/E1-RAN(=)
Cisco Network Modules
•Network Module with Two WIC slots and no LAN (Ethernet/Fast Ethernet) Ports: NM-2W=
Limitations, Restrictions, and Important Notes
Caution The Cisco MWR 1941-DC-A router does not support online insertion and removal (OIR) of WAN interface cards. Any attempt to perform OIR on a card in a powered up router might cause damage to the card.
Caution The Cisco MWR 1941-DC-A router does not support online insertion and removal (OIR) of network modules. Any attempt to perform OIR on a card in a powered up router might cause damage to the card.
Caveats in Cisco IOS Release 12.4(2)MR
The following sections list and describe the open caveats for the Cisco MWR 1941-DC-A router running Cisco IOS Release 12.4(2)MR. Only severity 1 through 3 caveats are included.
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.
Caveats in Cisco IOS Releases 12.4 and 12.4T are also in Cisco IOS Release 12.4(2)MR. For information on caveats in Cisco IOS Release 12.4, see Caveats for Cisco IOS Release 12.4. For information on caveats in Cisco IOS Release 12.4T, see Caveats for Cisco IOS Release 12.4T. These two documents list severity 1 and 2 caveats and are located on CCO and the Documentation DVD.
Note If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for any release. To reach Bug Navigator II, Login to Cisco.com and click Software Center: Cisco IOS Software: Cisco Bugtool Navigator II. Another option is to go directly to http://www.cisco.com/support/bugtools.
There are no known caveats in Cisco IOS Release 12.4(2)MR.
Collecting Data for Router Issues
To collect data for reporting router issues, issue the following command:
•show tech-support—Displays general information about the router when it reports a problem.
Collecting Data for ROMmon Issues
To collect data for ROMmon issues, issue the following command while in EXEC mode:
•showmon— Displays currently selected ROM monitor.
There are no documentation updates at this time.
These documents are available for implementing the Cisco MWR 1941-DC-A Mobile Wireless Edge Router in a RAN-O and are available on Cisco.com and the Documentation DVD:
Cisco Mobile Wireless RAN-O
•Cisco MWR 1941 Mobile Wireless Edge Router Documents
–Cisco MWR 1941-DC-A Mobile Wireless Edge Router Software Configuration Guide
–Cisco MWR 1941-DC-A Mobile Wireless Edge Router Rack Mounting Instructions
•Cisco Network Modules Installation Guides
–Network Modules Quick Start Guide
–Cisco Network Modules Hardware Installation Guide
•Cisco Interface Cards Installation Guides
–Quick Start Guide: Interface Cards
–Cisco Interface Cards Installation Guide
–Cisco 2-port T1/E1-RAN Installation Instructions
On Cisco.com at:
Technical Support & Documentation: Routers: Cisco MWR 1900 Mobile Wireless Routers
On the Documentation DVD at:
Technical Support & Documentation: Routers: Cisco MWR 1900 Mobile Wireless Routers
Note To be sure of obtaining the latest information, access the online documentation.
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
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Obtaining Technical Assistance
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Release Notes for Cisco MWR 1941-DC-A Mobile Wireless Edge for Cisco IOS Release 12.4(2)MR
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