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Cisco MWR 2900 Series Mobile Wireless Routers

Release Notes for Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5.5, Cisco IOS Release 15.1(3)MRA4

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Table of Contents

Release Notes for Cisco MWR MWR 2941 Mobile Wireless Edge Router Release 3.5.5, Cisco IOS Release15.1(3)MRA4

Contents

Introduction

System Requirements

Memory Requirements

Determining the Software Version

Upgrading to a New Software Release

New and Changed Information

Support for Existing Cisco MWR MWR 2941 Software Features

New Hardware Features in Cisco IOS Release 15.1(3)MRA4

New and Changed Behavior in Cisco IOS Release 15.1(3)MRA4

Limitations and Restrictions

Supported Hardware—Cisco MWR2941-DC Router

Supported MIBs

Caveats in Cisco IOS Release 15.1(3)MRA4

Open Caveats

Resolved Caveats

Troubleshooting

Related Documentation

Obtaining Documentation and Submitting a Service Request

Release Notes for Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5.5, Cisco IOS Release 15.1(3)MRA4

May 2, 2014

These release notes are for the Cisco MWR Mobile Wireless Edge Router Release 3.5.5 for Cisco IOS Release 15.1(3)MRA4. These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode.

For a list of the software caveats that apply to Cisco IOS Release 15.1(3)MRA4, see the “Caveats in Cisco IOS Release 15.1(3)MRA4”.

To review all Cisco MWR 2941 release notes, including Release Notes for Cisco MWR 2941 Mobile Wireless Edge Router for Cisco IOS Release 15.1(3)MRA4, go to:

http://www.cisco.com/en/US/products/ps9395/prod_release_notes_list.html

To review release notes for the Cisco IOS Software Release 15.1S, go to:

http://www.cisco.com/en/US/products/ps10890/prod_release_notes_list.html

Introduction

The Cisco MWR 2941 Mobile Wireless 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 radio access network (RAN). The Cisco MWR 2941 includes the following models:

  • Cisco MWR 2941-DC
  • Cisco MWR 2941-DC-A

The Cisco MWR 2941 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 HSPA or 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 MWR 2941 features a small form factor, extended operating temperature, and cell-site DC input voltages.

System Requirements

Memory Requirements

Table 1 lists the required memory for using this software.

 

Table 1 Cisco IOS Release 15.1(3)MRA4 Memory Requirements

Platform
Feature Set
Software Image
Recommended Flash Memory
Recommended DRAM Memory
Runs From

Cisco
MWR 2941

RAN
Optimization

mwr2941-adviprank9-mz.151-3.MRA3.bin

128 MB

512 MB

RAM

Cisco
MWR 2941

RAN
Optimization

mwr2941-advipran-mz.151-3.MRA3.bin

128 MB

512 MB

RAM

Determining the Software Version

To determine the image and version of Cisco IOS software running on your Cisco MWR 2941 router, log in to the router and enter the show version EXEC command:

Router> show version
Cisco IOS Software, 2900 Software (MWR2900-ADVIPRANK9-M), Version 15.1(3)MRA3, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Fri 10-Jan-14 00:53 by prod_rel_team
 
ROM: System Bootstrap, Version 12.3(20090306:152119) [BLD-v124_19_mr2_throttle 104], DEVELOPMENT SOFTWARE
 
Router uptime is 4 minutes
System returned to ROM by power-on
System restarted at 04:28:06 IST Sat Jan 11 2014
System image file is "flash:mwr2941-adviprank9-mz.151-3.MRA3"

Upgrading to a New Software Release

For general information about upgrading to a new software release, refer to the Software Installation and Upgrade Procedures at:

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a00801fc986.shtml

New and Changed Information

The following sections list the new hardware and software features supported by the Cisco MWR 2941 router.

Support for Existing Cisco MWR 2941 Software Features

Cisco IOS Release 15.1(3)MRA4 supports the software features supported in Cisco IOS Release 15.1S.

For more information about Release 15.1S and previous releases, see:

http://www.cisco.com/en/US/products/ps9395/prod_release_notes_list.html .

New Hardware Features in Cisco IOS Release 15.1(3)MRA4

There are no new hardware features with Cisco MWR 2941 Release 3.5.5.

New and Changed Behavior in Cisco IOS Release 15.1(3)MRA4

There are no new and changed behavior with Cisco MWR Release 3.5.5, Cisco IOS Release 15.1(3)MRA4.

Limitations and Restrictions


Caution The Cisco MWR 2941 router does not support online insertion and removal (OIR) of WAN interface cards. Any attempt to perform OIR on a card in a powered-on router might cause damage to the card.

Cisco IOS Release 15.1(3)MRA4 for the Cisco MWR 2941 router has the following limitations and restrictions:

  • Synchronous Ethernet is not supported on the SFP-GE-T module.
  • Release 15.1(3)MRA4 does not support ATM over MPLS N-to-1 Cell Mode or 1-to-1 Cell Mode.
  • SPAN and RSPAN are not supported.
  • VLAN Query Protocol (VQP) and VLAN Management Policy Server (VMPS) are not supported
  • CFM Extension for Microwave 1+1 Hot Standby (HSBY) is only supported on Gigabit Ethernet interfaces 0/0–0/5.
  • CEF Limitations—Cisco Express Forwarding (CEF) has the following limitations.

Load balancing on GRE interfaces is not supported

Load balancing on IOS switch interfaces is not supported

Packets may choose different egress interfaces when interface is up/down

Up to 16 interfaces are supported for load balancing

SNMP traps for CEF load balancing are not supported

  • Ingress vlan classification and marking is not supported on dot1q tunnel interfaces.
  • Release 15.1(3)MRA4 does not support the 802.1ad standard for VLAN scalability. However, the release supports QinQ, a Cisco-proprietary system for double-tagging.to provide VLAN scalability in the provider networks.
  • Release 15.1(3)MRA4 does not support the switchport vlan mapping default drop command.
  • Release 15.1(3)MRA4 does not support translation between CFM draft 1 and IEEE standardized 802.1ag CFM.
  • Ethernet LCK is not supported.
  • OAM Manager.is not supported.
  • CFM Draft 1.0 is not supported.
  • CFM for Customer VLANs (C-VLANs) is not supported.
  • Ethernet Locked Signal is not supported.
  • Rapid PVST+ is not supported.
  • VLAN translation is not supported on HWIC interfaces.
  • Rate limiting and policing are not supported on HWIC or onboard Gigabit Ethernet interfaces.
  • GSM Abis optimization not supported—Release 15.1(3)MRA4 does not support GSM Abis optimization feature that was supported in Release 12.4(20)MR1.
  • Reduced HWIC support—Release 15.1(3)MRA4 does not support the HWIC-1GE-SFP, HWIC-4SHDSL, HWIC-1ADSL, and HWIC-1ADSL-I HWICs that were supported in Release 12.4(20)MR1.
  • GRE offload not supported— 15.1(3)MRA4 does not support the GRE offload feature that was supported in Release 12.4(20)MR1.
  • UMTS Iub Optimization not supported—Release 15.1(3)MRA4 does not support UMTS Iub optimization.
  • L2TP not supported—The MWR 2941 currently does not support L2TP.
  • Multicast used for PTP redundancy only—This release provides support for multicast in order to establish PTP redundancy; the Cisco MWR 2941 does not support multicast for other uses.
  • Out-of-band master mode not supported—This release does not support out-of-band master mode for Timing over Packet/adaptive clock recovery. If your network design requires out-of-band master clocking, you can use the CEoPs SPA on the 7600 router for this purpose.
  • ACR out-of-band payload limitation—The MWR 2941 only supports the payload-size values 486 (625 packets per second) or 243 (1250 packets per second) for out-of-band clock recovery.
  • T1 SAToP is not supported on the HWIC-4T1/E1.
  • Limited OAM support—ATM OAM (Operation, Administration, and Maintenance) is not supported on the short haul side of the Cisco MWR 2941.
  • The Cisco MWR 2941 does not support the mpls traffic-eng tunnels command at the global or interface level.
  • QoS Limitations—The Cisco MWR 2941 provides limited QoS support. For more information, see the Cisco MWR 2941-DC Mobile Wireless Edge Router Software Configuration Guide, Release 12.2(33)MRB .
  • The Cisco MWR 2941 does not support the following options on offloaded dMLPPP bundles:

ppp multilink idle-link

ppp multilink queue depth

ppp multilink fragment maximum

ppp multilink slippage

ppp timeout multilink lost-fragment


Note If you have a bundle that requires the use of these options, contact Cisco support for assistance.


For more information about configuring dMLPPP, see the Cisco MWR 2941-DC Mobile Wireless Edge Router Software Configuration Guide, Release 15.1(3)MRA4.

  • MPLS pseudowire ping not supported—This release does not support the ping mpls pseudowire command. We recommend that you use the ping mpls ipv4 command for operation and maintenance of MPLS connections.
  • CAS limitations—The Cisco MWR 2941 implementation of CAS has the following limitations:

CAS is not supported on T1 and E1 HWICs.

When configuring a CESoPSN pseudowire to use CAS, you must configure the controller to use CAS signalling prior to creating a cem group, tdm group, or channel group. Otherwise the Cisco MWR 2941 rejects the mode cas command.

CAS is only supported on pseudowire connections between two Cisco MWR 2941 routers; the 7600 router does not currently support CAS.

  • PTP only supported on Gigabit Ethernet interfaces—The Cisco MWR 2941 only supports PTP traffic on onboard Gigabit Ethernet interfaces.
  • PPPoA not supported—This release does not provide support for PPPoA.
  • ADSL not supported—This release does not support ADSL.
  • BFD interface support limitations—Release 15.1(3)MRA4 only supports BFD on switched virtual interfaces (SVIs).
  • Multicast interface limitations—Multicast is only supported on VLANs and Ethernet interfaces. Multicast routing is not supported on other interface types.
  • Release 15.1(3)MRA4 supports up to 64 VLANs if the HWIC-D-9ESW card is in use; otherwise it supports a maximum of 255 VLANs as in previous releases.
  • The Cisco MWR 2941 does not support access control lists (ACLs) for layer 3 forwarding through the network processor.
  • The show interfaces command displays inaccurate information when used with the counters keyword. The counters for multicast packets display as 0 even if multicast traffic is passing on the router. To display correct multicast counters, use the show interfaces command without the counters keyword.
  • The multicast packet counters in the show interfaces type number counters command output are set to 0 even if multicast traffic is enabled. To see accurate counters for multicast traffic, use the show interfaces command without the counters keyword.
  • Virtual path-to-virtual path local switching is not supported.
  • Local switching is only supported between onboard T1 and E1 ports; local switching between HWIC T1 and E1 ports is not supported.
  • Ethernet loopback is only supported on onboard Gigabit Ethernet interfaces; it is not supported on HWIC Ethernet or port-channel interfaces.

Supported Hardware—Cisco MWR 2941-DC Router

The Cisco MWR 2941 supports the following interface cards:

  • HWIC-4T1/E1
  • HWIC-D-9ESW

Note Release 15.1(3)MRA4 does not support the HWIC-1GE-SFP, HWIC-4SHDSL, HWIC-1ADSL, and HWIC-1ADSL-I HWICs that were supported in Release 12.4(20)MR1.


The Cisco MWR 2941 router supports the following SFP modules:

  • CWDM-SFP-1470
  • CWDM-SFP-1490
  • CWDM-SFP-1510
  • CWDM-SFP-1530
  • CWDM-SFP-1550
  • CWDM-SFP-1570
  • CWDM-SFP-1590
  • CWDM-SFP-1610
  • DWDM-SFP-4612
  • DWDM-SFP-4692
  • DWDM-SFP-4772
  • DWDM-SFP-4851
  • DWDM-SFP-5012
  • DWDM-SFP-5092
  • DWDM-SFP-5172
  • DWDM-SFP-5252
  • DWDM-SFP-5413
  • DWDM-SFP-5494
  • DWDM-SFP-5575
  • DWDM-SFP-5655
  • DWDM-SFP-5817
  • DWDM-SFP-5898
  • DWDM-SFP-5979
  • DWDM-SFP-6061
  • GLC-BX-D
  • GLC-BX-U
  • GLC-EX-SMD
  • GLC-LH-SMD
  • GLC-LX-SM-RGD
  • GLC-SX-MM-RGD
  • GLC-ZX-SM-RGD
  • SFP-GE-L
  • SFP-GE-S
  • SFP-GE-T
  • SFP-GE-Z

Other hardware interfaces are not supported.


Caution The Cisco MWR 2941 router does not support online insertion and removal (OIR) of WAN interface cards. Any attempt to perform OIR on a card in a powered-on router might cause damage to the card.

For instructions on how to install HWICs and SFPs, see the documentation included with the product. For information about how to configure HWICs and SFPs, see the Cisco MWR 2941 Mobile Wireless Edge Router Software Configuration Guide, Cisco IOS Release 15.1(3)MR.

Supported MIBs

The Cisco MWR 2941 router supports the following MIBs:

 

  • CISCO-ACCESS-ENVMON-MIB
  • CISCO-CDP-MIB
  • CISCO-CONFIG-COPY-MIB
  • CISCO-CONFIG-MAN-MIB
  • CISCO-ENHANCED-MEMPOOL-MIB
  • CISCO-ENTITY-EXT-MIB
  • CISCO-ENTITY-FRU-CONTROL-MIB
  • CISCO-ENTITY-SENSOR-MIB
  • CISCO-ENTITY-VENDORTYPE-OID-MIB
  • CISCO-ENVMON-MIB
  • CISCO-FLASH-MIB
  • CISCO-IETF-BFD-MIB
  • CISCO-IETF-PW-MIB
  • CISCO-IETF-PW-TC-MIB
  • CISCO-IF-EXTENSION-MIB
  • CISCO-IMAGE-MIB
  • CISCO-MEMORY-POOL-MIB
  • CISCO-PROCESS-MIB
  • CISCO-PRODUCTS-MIB
  • CISCO-RESILIENT-ETHERNET-PROTOCOL-MIB
  • CISCO-RTTMON-MIB
  • CISCO-SMI
  • CISCO-SYSLOG-MIB
  • CISCO-TC
  • CISCO-VTP-MIB
  • ENTITY-MIB
  • HCNUM-TC
  • IANAifType-MIB
  • IF-MIB
  • IMA-MIB
  • INET-ADDRESS-MIB
  • IP-FORWARD-MIB
  • IP-MIB
  • MPLS-VPN-MIB
  • OLD-CISCO-CHASSIS-MIB
  • OLD-CISCO-INTERFACES-MIB
  • OLD-CISCO-SYS-MIB
  • OLD-CISCO-TS-MIB
  • PerfHist-TC-MIB
  • RFC1213-MIB
  • RMON2-MIB
  • RMON-MIB
  • SNMP-FRAMEWORK-MIB
  • SNMP-TARGET-MIB
  • SNMPv2-CONF
  • SNMPv2-MIB
  • SNMPv2-SMI
  • SNMPv2-TC

Note Release 15.1(3)MRA4 provides limited support for the CISCO-CLASS-BASED-QOS-MIB for tail drop monitoring; the router supports the cbQosQueueingDiscardPkt64 object within the cbQosQueueingStatsTable table for tail drop accounting. Other objects in this table and other tables within the CISCO-CLASS-BASED-QOS-MIB are not supported.


Caveats in Cisco IOS Release 15.1(3)MRA4

This section documents the open and resolved caveats for the Cisco MWR 2941 router running Cisco IOS Release 15.1(3)MRA4.

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.

For information on caveats in Cisco IOS Software Releases 15.1S, go to:

http://www.cisco.com/en/US/products/ps10890/prod_release_notes_list.html .

The following section describe the following types of caveats in Cisco IOS Release 15.1(3)MRA4.

Open Caveats

  • CSCum40590

Symptom: Huge Change in TTL when MWR with Explicit-null is acting as an exit point.

Conditions: Occurs in the following topology:

Topology:

7600---MWR1---MWR2

When MWR is configured as Explicit Null and acts as Exit point for MPLS domain, we see there is a Huge decrement in IP TTL when MPLS label is stripped off.

Workaround: Remove the explicit null configuration.

Resolved Caveats

  • CSCuo56800

Symptom: Traffic stops forwarding with swap label on MWR.

Conditions: Occurs in the following topology:

Topology: Occurs in the Ring Topology

On a Ring Topology, sometimes, swap label operation does not work as expected. MWR is not able to reach a specific loopback. The issue is inconsistent and is seen on production network only.

Workaround: Using “clear mpls ldp neighbor” command will restore the connectivity.

  • CSCui48440

Symptom: Periodically, MWR-2941 Router sees incorrect input Octet counter values for InHCOctets and InOctets for Multilink interfaces. 64-bit (HC) counters make large increments in value, and 32-bit counters can be seen to move backwards between polls that are 5 seconds apart.

Conditions: Occurs in the following:

Topology: MWR-------7600

The 64-bit (HC) counters make large increment in value, and 32-bit counters can be seen to move backwards between polls that are 5 seconds apart on multilink interfaces.

  • CSCun32974

Symptom: CDP neighbor not seen post reload between MWR and adjacent node.

Conditions: Occurs in the following topology:

Topology: MWR-------7600

CDP neighbors on MWR interface may not resolve after boot-up. After reload, MWR2941 port is seen to be up but not the CDP neighbor.

  • CSCtr40946

Symptom: CLI shows 0 unknown protocol drops on serial interface but, the SNMP ifInUnknownProtos counter shows Values.

Conditions: Occurs in the following topology:

Topology: MWR1-----------MWR2

The issue is seen on back to back connected serial interface. Other interfaces work fine.

  • CSCun28051

Symptoms: SNMP poll of ifHCOutBroadcastPkts and ifOutBroadcastPkts returns incorrect/huge values.

Conditions: Occurs in the following topology:

Topology: MWR1-----------MWR2

  • CSCug35780

Symptoms: Vlan.dat file is missing. Vlan.dat file is created in flash after reload. However, extended Vlans are not created.

Conditions: Occurs in the following topology:

Topology: MWR1-----------MWR2

This issue is seen when Vlan.dat file is missing and VTP domain is configured explicitly.

Workaround: Reloading ensures extended Vlan creation.

  • CSCun65274

Symptom: Layer 2 Jumbo frames was not supported by MWR.

Conditions: Occurs in the following topology:

Topology: IXIA1---------MWR1-----------MWR2-------IXIA2

Frame size above 4500 were dropped.

  • CSCug84800

Symptom: Speed/Duplex is not resolved and interface link goes down on multiple reloads.

Conditions: Occurs in the following topology:

Topology: IXIA1---------MWR1---------MWR2--------IXIA2

This issue is seen after multiple reloads.

Workaround: Flapping the interface makes it to come up.

  • CSCum88825

Symptom: During congestion in default-class LACP, PDUs are dropped.

Conditions: Occurs in the following topology:

Topology: IXIA1---------MWR1---------MWR2--------IXIA2

During congestion of default-class LACP, PDUs are dropped. LACP PDUs are sent on queue 0. LACP PDUs should be classified to queue 7.

Workaround: Classify other traffic to match a different queue.

  • CSCum39857

Symptom: The TTL does not get changed hop by hop and it stays as 255.

Conditions: Occurs in the following topology:

Topology: ASR901----MWR----MWR----7600

The issue is seen while using NextHop through default route.

Workaround: Remove the default route and configure the static route with NextHop IP.

Troubleshooting

The following sections describe troubleshooting commands you can use with the Cisco MWR 2941.

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 if it reports a problem.

Collecting Data for ROMmon Issues

To collect data for ROMmon issues, issue the following command while in EXEC mode:

  • show rom-monitor —Displays currently selected ROM monitor.

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

Related documents for implementing the Cisco MWR 2941 mobile wireless edge router are available on Cisco.com

To access the related documentation on Cisco.com, go to:

http://www.cisco.com/en/US/products/ps9395/tsd_products_support_series_home.html

Documents related to the Cisco MWR 2941-DC mobile wireless edge router include the following guides:

  • Cisco MWR 2941 Mobile Wireless Edge Router documents

Cisco MWR 2941 Mobile Wireless Edge Router Hardware Installation Guide

Cisco MWR 2941 Mobile Wireless Edge Router Software Configuration Guide, Cisco IOS Release 15.1(3)MR

Cisco MWR 2941 Router Command Reference, Cisco IOS Release 15.1(3)MR

Regulatory Compliance and Safety Information for the Cisco MWR 2941 Mobile Wireless Edge Routers

  • Release Notes— Release Notes for Cisco MWR 2941 Mobile Wireless Edge Router for Cisco IOS Release 15.1(3)MRA4
  • Cisco Interface Cards Installation Guides

Quick Start Guide: Interface Cards

Cisco Interface Cards Installation Guide

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, 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

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS Version 2.0.