Примечания к выпуску для Cisco Cisco IOS Software Releases 12.2 MC

MLP LFI is not supported by the Cisco MWR 1941-DC router. Therefore, MLP LFI must be disabled on 
peer devices connecting to the Cisco MWR 1941-DC router T1 MLP connections.

If upgrading to Cisco IOS Release 12.2(8)MC2c or later for the ACFC and PFC support on PPP 
interfaces, ensure that you upgrade the MGX-RPM-1FE-CP backcard image first. After doing so, 
immediately upgrade all MWR 1941-DC routers connected to the MGX-RPM-1FE-CP back card.

The following sections list and describe the open and closed caveats for the Cisco MWR 1941-DC router 
running Cisco IOS Release 12.2(15)MC2a. 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 12.2 and 12.2 T are also in Cisco IOS Release 12.2(15)MC2a. For 
information on caveats in Cisco IOS Release 12.2, see Caveats for Cisco IOS Release 12.2. For 
information on caveats in Cisco IOS Release 12.2 T, see Caveats for Cisco IOS Release 12.2 T. These 
two documents list severity 1 and 2 caveats and are located on CCO and the Documentation CD-ROM. 

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. 

The caveats listed in this section are open in Cisco IOS Release 12.2(15)MC2a.

CSCdz37497

Description: When PPPMux and cUDP are configured, during periods of sustained multicast traffic 
at a rate of 100 pps or more causes a periodic “out-of-sequence” condition in the MWR 1941-DC 
IOS decompression.

Workaround: Reduce the rate of multicast traffic.

CSCea73056

Description: During a failover, the MWR 1941-DC router software opens T1/E1 relays on the active 
router without taking down the multilink interface first. Packets are sent to the disconnected 
interface for the next several second until the multilink interface is declared down. This condition 
causes the network management system to not receive SNMP traps generated during the failover.

Workaround: There is currently no workaround.

CSCea85262

Description: When shutting down a multilink interface, the virtual access (VA) interface associated 
with the multilink interface flaps.

Workaround: Shut down the subinterface associated with the multilink group.