Specifications

1326
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S3
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20050412-icmp.shtml.
The disclosure of these vulnerabilities is being coordinated by the National Infrastructure Security
Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple
vendors whose products are potentially affected.
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.
• 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
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.
• 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.
Workaround: Remove the Frame Relay encapsulation before you delete the channel group.