Cisco Cisco IOS Software Releases 12.2 MC

Cisco Express Forwarding (CEF)

You cannot disable CEF on the MWR 1941-DC. Commands such as no ip cef will display an error 
message “%Cannot disable CEF on this platform.” Some commands, such as no ip route-cache cef, 
will not return an error message, however, CEF will not be disabled regardless of whether or not an 
error message is displayed. 

Hot Standby Router Protocol

 (

HSRP)

In case of a tie in priority, HSRP uses the IP address to determine the active router. Therefore, you 
should ensure that the order of the IP addresses of the E1/T1 interfaces of the active router 
corresponds to the order of the IP addresses of the E1/T1 interfaces of the standby router. 

To determine the version of Cisco IOS software running on your Cisco MWR 1941-DC router, log in to 
the Cisco MWR 1941-DC and enter the show version EXEC command:

router> show version

     Cisco Internetwork Operating System Software 

     IOS (tm) 1900 Software (MWR1900-I-MZ), Version 12.2(15)MC2a, EARLY DEPLOYMENT RELEASE 

     SOFTWARE (fc1)

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

The Cisco MWR 1941-DC router ROM Monitor (ROMMON) consists of two modules: 

A resident module that is not changed during the upgrade procedure. 

An upgradable module that is updated during the upgrade procedure. This is the only module that 
you will download from Cisco.com.

Before performing this procedure, you must download the new ROMMON image from Cisco.com. The 
download procedure is the same as downloading Cisco IOS software images. 

Cisco MWR 1941-DC router

 mwr1900-i-mz

32 MB Flash

128 MB DRAM

RAM