Specifications

1393
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
• CSCec03907
Symptoms: A Route Switch Processor 4 Plus (RSP4+) may reload.
Conditions: This symptom is observed on a Cisco 7500 series when you configure the interface
loopback interface-number interface configuration command on an interface of the router and the
value of the interface-number argument is a 9-digit number that starts with 10.
Workaround: If possible, use another range of numbers for the numbers that are assigned to the
loopback interfaces, that is, a range of numbers that do not start with 10.
• CSCec04473
Symptoms: A Versatile Interface Processor (VIP) may reload when you remove a service policy
from a Frame Relay (FR) permanent virtual circuit (PVC).
Conditions: This symptom is observed on a Cisco 7500 series during a high traffic load.
Workaround: Shut down the interface or subinterface on which the FR PVC is configured before you
remove the service policy.
• CSCec06146
Symptoms: A serial interface of a 1-port multichannel E3 port adapter (PA-MC-E3) may fail to enter
the “up/up” state when you initially configure the interface or after a number of reconfigurations.
Conditions: This symptom is observed on a PA-MC-E3 that is installed in a Cisco 7500 series or
Cisco 7600 series when the following sequence of events occurs:
1. You configure an interface by entering the controller e3 slot/port global configuration
command followed by the e1 line-number channel-group channel timeslots range controller
configuration command.
2. You delete the interface by entering the controller e3 slot/port global configuration command
followed by the no e1 line-number channel-group channel controller configuration command.
3. You reconfigure the interface by entering the commands listed in Step 1.
Although the symptom may occur when you initially configure the interface, it is more likely to
occur when you configure, delete, and reconfigure the interface several times.
Workaround: When the interface does not enter the “up/up” state, configure the interface again.
• CSCec06275
Symptoms: The following error message may be displayed on the console of a Route Switch
Processor (RSP):
%CBUS-3-CMDDROPPED: Cmd dropped,CCB 0xF800FFB0,slot 9, cmd code 24
Conditions: This symptom is observed on a Cisco 7500 series when software compression is enabled
on serial interfaces and dialer interfaces and when Cisco Express Forwarding (CEF) switching rather
than distributed CEF (dCEF) switching is enabled. This situation causes software compression to
occur on the RSP.
Because software compression is enabled on all the serial interfaces, the CPU utilization of the RSP
becomes very high, causing commands to be dropped.
Workaround: Remove software compression from the serial interfaces.
• CSCec07487
Symptoms: An interface may not transmit traffic because the output may be stuck. When this
symptom occurs, the console of the Route Switch Processor 4 (RSP4) may display the following
error messages:
%ISDN-6-LAYER2DOWN: Layer 2 for Interface Se1/0/2:15, TEI0 changed to down