Specifications

124
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(3)
• CSCdk71921
AAA authentication method lists disappear when you upgrade from Cisco IOS Release 11.2 to
Cisco IOS Release 11.3 or later IOS releases. When aaa authentication local-override is
configured in a Release 11.2 image and AAA authentication method lists have three or more
methods defined, upgrading to Cisco IOS Release 11.3 or later IOS releases generates a traceback.
Workaround: Remove one or more of the methods before the upgrade.
• CSCdk72139
When Reply-Messages are included in a RADIUS Access-Accept, attributes following the
Reply-Message attributes might not be recognized. For instance, if multiple Reply-Messages are
included in the Access-Accept, only the first reply message is displayed.
Workaround: Do not use Reply-Messages in Access-Accept or Access-Reject. If Reply-Messages
are absolutely needed in an Access-Accept or Access-Reject, there should be only one attribute and
it should be included as the very last attribute in the reply. Reply-Messages in Access-Challenge
should work properly.
• CSCdk74502
No data connectivity can be established across Switch 0 data DLCIs even though a Cisco IGX
switch is transmitting normally.
Workaround: The same DLCI should be used for the end-to-end IP routing data connections
(Switch 0 connections). The trunk DLCIs (management, Frame-Relay, and voice DLCIs) should
not be used for data or voice connection DLCIs inside of the connect statement.
• CSCdk75174
The Async-HDLC microcode from Motorola has a problem with certain data transparency (escape)
sequences. One known example is the following PPP/LCP sequence sent from a Bay Nautica 4000
router:
7e 7d df 7d 23 c0 21 ....
It appears that the microcode cannot handle the “7d df” (escaped “0xff”).
Workaround: Get a new version of microcode from Motorola. Until that happens, another solution
is to turn off the Async-HDLC microcode and do not enable “hardware-assisted PPP mode” within
the Cisco IOS software. Instead, the Async-PPP framing is done in software (by the Cisco IOS
software). To enable this mode of operation, the hidden command [no] microcode-enable is being
added as an interface configuration command to the Cisco 1600 series router asynchronous
interfaces.
• CSCdk77783
The Cisco 1005 router and Cisco 1600 series routers do not properly support the ignore-dcd serial
interface configuration command. The Cisco 1005 router does not accept the command at all, and
the Cisco 1600 series router accepts the command but does not operate properly if it is issued.
Certain external modems and CSU/DSU devices require the ability of the DTE to ignore the DCD
signal, and use of such devices is not possible until this fix is available. There is no workaround.
• CSCdk78895
A Cisco router might experience a software-forced reload every one or two hours. This condition
is caused by SNMP.
Workaround: Do not use SNMP.