Specifications

139
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
• CSCdk40393
A Cisco MC3810 with both multiflex trunk (MFT) and digital voice module (DVM) installed might
see T1 clock slips on the T1 controllers under certain circumstances. Clock slips are reported when
viewing the T1 controller statistics with the EXEC command show controller t1.
When the Cisco MC3810 is configured with both T1 controller 0 and controller 1 set for
clock source line and the proper global configuration command network-clock-select has been
entered, the Cisco MC3810 system clock synchronizes with one of the T1 controller clocks while
temporarily setting the other controller to loop timing. The problem is that even though the
secondary T1 controller reports loop timing as seen with show controller t1, the system clock is
still being driven by both T1 controllers. This occurs even though there might only be one active
T1 line connected to the Cisco MC3810 or even when the unused T1 controller is administratively
shut down.
The workaround for this problem is to set one of the controllers for either loop or internal through
the controller subcommand clock source.
• CSCdk40554
Crash information might not be saved when certain types of memory corruption occur.
• CSCdk40599
An SNMP memory might leak when SNMP ping is enabled.
• CSCdk41472
Using traffic shaping with custom queuing might drop too many packets.
• CSCdk41494
If a network management application were to add an entry in the ping MIB table, not activate the
entry, and then delete it before it is aged out of the MIB by the 5-minute timer, the router could fail.
• CSCdk41795
The aaa accounting nested configuration command is not available from the configuration parser.
• CSCdk42462
X.25 CSTATE occasionally runs out of stack space, causing an unscheduled reload of the router.
• CSCdk43920
From the login prompt, it is possible to recover fragments of lines typed by the previous user of the
same physical or virtual terminal line. This might represent a security exposure. A complete
description and details are at http://www.cisco.com/warp/public/770/ioshist-pub.shtml.
• CSCdk44323
A router is not able to connect to the mainframe, if the mode-name is less than eight characters.
• CSCdk45166
Timeslot 1 appears to get into a hung state at the framer level and endlessly sends a ABCD=F. This
is only seen when you do a tdm-group and a cross-connect for timeslots 1 through x.
• CSCdk47382
NTP on Cisco 2600 series and Cisco 3800 series platforms does not stay synchronized. After some
time, the clock wanders and NTP becomes unsynchronized. Removing the NTP configuration and
adding the NTP configuration back causes the router to synchronize again, but later it becomes
unsynchronized.
Workaround: Issue the ntp clock-period 17208078 command.