Specifications

1105
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S3
Conditions: This symptom is observed on a Cisco 12000 series that is configured for multicast.
Workaround: There is no workaround.
• CSCef23912
Symptoms: A traceback is generated on the console and logged in the logging buffer, and the count
in the output of the show alignment command increments.
Conditions: This symptom is observed on a Cisco 10000 series that is configured as a provider edge
(PE) router when you enter the show mpls forwarding command to show the pop labels and the
active LDP peers.
Workaround: There is no workaround.
• CSCef25686
Symptoms: A number of PVCs may become locked in an inactive state, and the following type of
error message may appear in the log:
%ATM-3-FAILREMOVEVC: ATM failed to remove VC(VCD=X, VPI=X, VCI=X) on Interface ATM
X/X/X, (Cause of the failure: PVC removal during recreation failed)
Conditions: This symptom is observed when you change the parameters of a VC class while the PVC
is active and while you view the PVC status in the output of the show atm vc interface
interface-number command.
The symptom occurs when you change the PVC speed in a VC class via one Telnet (or console)
session and you enter the show atm vc interface interface-number command via another Telnet (or
console) session.
Workaround: To remotely resolve the symptoms, remotely initiate an HA failover or remotely reload
the affected router.
• CSCef25953
Symptoms: DSCP-based DWRED statistics are not updated in output of the show policy-map
interface command: random drop and tail drop statistics are always shown as zero.
Conditions: This symptom is observed on a Cisco 7500 that is configured with an RSP4. However,
this caveat may be platform-independent.
Workaround: There is no workaround.
• CSCef35911
Symptoms: MPLS IAS traffic without labels is dropped at one ASBR when PPP encapsulation is
configured between two ASBRs.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(28)S1 and that functions as an ASBR. However, the symptom may be
platform-independent and may also occur in other releases.
Workaround: Change the encapsulation to HDLC.
• CSCef43691
A document that describes how the Internet Control Message Protocol (ICMP) could be used to
perform a number of Denial of Service (DoS) attacks against the Transmission Control Protocol
(TCP) has been made publicly available. This document has been published through the Internet
Engineering Task Force (IETF) Internet Draft process, and is entitled “ICMP Attacks Against TCP”
(draft-gont-tcpm-icmp-attacks-03.txt).
These attacks, which only affect sessions terminating or originating on a device itself, can be of
three types: