Specifications

1064
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(29)S
Wide-Area Networking
• CSCdx84284
Symptoms: A router may not recognize some inbound Multiprotocol Label Switching
(MPLS)-tagged packets that are sent via Frame Relay. Because the router cannot recognize the
inbound MPLS-tagged packets, MPLS cannot switch those packets to the outgoing interface. The
MPLS-tagged packets are dropped by the router, and the router does not increment the input-packet
counter in the output of the show frame pvc output EXEC command.
Conditions: This symptom is observed on a Cisco router that has Cisco Express Forwarding (CEF)
enabled and that is running Cisco IOS Release 12.2(7b). The symptom may also occur in other
releases.
Workaround: Enable the debug mpls packets EXEC command.
• CSCec55849
Symptoms: Packets may not be resequenced within a Multilink Frame Relay (MFR) bundle. This
situation may have a negative impact on some protocols and applications such as VoIP.
Conditions: This symptom is observed on nondistributed Cisco platforms such as the Cisco 2600
series. The symptom does not affect distributed Cisco platforms such as the Cisco 7500 series and
the Cisco 12000 series.
Workaround: There is no workaround.
• CSCed02028
Symptoms: A router may reload unexpectedly because of a bus error after the following error
message is displayed:
%ATMPA-3-BADVCD:ATM[int] bad vcd [number] packet -
Conditions: This symptom is observed on a Cisco router that is configured with an ATM interface.
Conditions: This symptom is observed on a Cisco router that is configured with an ATM interface
when a packet that contains a virtual circuit descriptor (VCD) that is out range is passed on to the
ATM driver of the interface in order to be transmitted.
Workaround: There is no workaround.
• CSCed21813
Symptoms: A Cisco 7204VXR in which an enhanced 1-port ATM OC-3c/STM-1 port adapter
(PA-A3-OC3) is installed may reload unexpectedly because of a bus error. However, the cause of the
symptom may be a segmentation and reassembly (SAR) chip failure that occurs because of an
“Address Error (store) exception”.
Conditions: This symptom is observed on a Cisco 7204VXR that is configured for Dynamic
Bandwidth Selection (DBS) support when you attempt to modify the VC QoS parameters under high
traffic conditions.
Workaround: Shut down the ATM interface before attempting to modify the VC QoS parameters.
• CSCee15586
Symptoms: A Cisco 7500 series may crash when you configure a T1 channel group.
Conditions: This symptom is observed on a Cisco 7500 series that runs Cisco IOS
Release 12.0(26)S or 12.0(27)S when the same channel group was previously configured for Frame
Relay encapsulation, when one or more PVCs on the channel group were configured on the main
interface with a map class that contained a service policy, when the channel group was deleted, and
when the map class definition that it referenced was also deleted.