Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

Resolved Caveats—Cisco IOS Release 12.0(9)S

All the caveats listed in this section are resolved in Cisco IOS Release 12.0(9)S. This section describes

only severity 1 and 2 caveats.

Basic System Services

• CSCdm81049

If a serial interface is flapping up and down repeatedly, the router might pause indefinitely with a

stack trace indicating that it is in usecdelay() as a result of cbus_mci_serial_reset() being called

while at interrupt level. This situation rarely occurs.

Workaround: Enter the shutdown interface configuration command on the serial interace that is

flapping up and down.

• CSCdp23786

A Cisco router that is running Cisco IOS Release 12.0(7)T cannot execute boot configuration

commands from Flash, and exhibits the following error message:

%Error opening nvram:/startup-config (File system is in an inconsistent state)

When this message is displayed, no configuration is loaded. If you enter the

copy startup-config running-config command and then enter the no shutdown interface

configuration command, the router will come back on line. There is no workaround.

• CSCdp56057

Cisco 3620 routers and Cisco 3640 routers might exhibit traceback messages after being reloaded.

The tracebacks occur because of uninitialized semaphore attempts to become locked. This situation

does not affect the router functions. There is no workaround.

• CSCdp57908

This caveat adds support for a new revision of a hardware component that fixes a previous error.

For the benefit of users that have not upgraded to the new hardware, it will also exhibit a warning

error message that indicates the old hardware revision.

Cisco 7200 series routers with NPE-175 or NPE-225 network processing engines must upgrade to

Cisco IOS releases that incorporate this change (for example, Cisco IOS Release 12.0(9) and later

releases or Cisco IOS Release 12.0(9)S and later releases). Use of older Cisco IOS releases might

result in unpredictable malfunctions. Please see the following document for further information:

http://www.cisco.com/warp/customer/770/fn8611.shtml

IBM Connectivity

• CSCdp09919

Remote source-route bridging (RSRB) might change frame types. This situation occurs on Cisco

routers that are running RSRB where one side of the RSRB is running Cisco IOS Release 11.0 and

the other side is running Cisco IOS Release 12.0. The frame that is moving along the source-route

translational bridging (SR/TLB) and RSRB bridge will be changed from an Ethernet Type II frame

to an IEEE 802.3 Ethernet frame.

Workaround: Configure the 90-compatible option by entering the

source-bridge transparent ring-group pseudo-ring bridge-number tb-group [90-compatible]

global configuration command.