Specifications

1284
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S4
• CSCef67267
Symptoms: The Fast ReRoute database shows all prefixes in the active state.
Conditions: This symptom is observed on a Cisco router after a connected point of local repair
(PLR) has rebooted.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the interface on which the primary tunnel is configured. Doing
so restores the prefixes to the ready state.
• CSCef67840
Symptoms: When the CEF table consistency checker is configured to perform a passive scan check
of tables of the line cards, the CEF table consistency checker may report false inconsistencies, which
you can view in the output of the show ip cef ip-address command. The false inconsistencies may
occur because of a race condition.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(27)S1.
If an inconsistency is reported for a recursive loadbalanced route for which the output interfaces for
the next-hop IP address differ between the RP and line card, you can ignore this inconsistency
because this information is not used during the forwarding process.
Workaround: Disable the CEF table consistency checker so that no passive scan check is performed
of tables of the line cards.
• CSCef68324
Cisco Internetwork Operating System (IOS) software is vulnerable to a Denial of Service (DoS) and
potentially an arbitrary code execution attack from a specifically crafted IPv6 packet. The packet
must be sent from a local network segment. Only devices that have been explicitly configured to
process IPv6 traffic are affected. Upon successful exploitation, the device may reload or be open to
further exploitation.
Cisco has made free software available to address this vulnerability for all affected customers.
More details can be found in the security advisory that is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20050729-ipv6.shtml.
• CSCef68439
Symptoms: The COOL does not trace the RP Up event when the Route Processor (RP) comes back
up.
Conditions: This symptom is observed on a Cisco 12000 series Internet router, which runs
Cisco IOS Release 12.0 S.
Workaround: There is no workaround. Reload the router to clear the condition.
• CSCef69146
Symptoms: A Cisco 12000 series crashes when the encapsulation of T1 channels is changed to MFR
during a cut-and-paste operation of the configuration or when you copy from a file to the running
configuration.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(28)S1 and that is configured with a 1-port channelized OC-12/STM-4 (DS1/E1) ISE
line card when the configuration is changed at a fast pace. When the configuration lines are entered
at a slower pace, the symptom does not occur.
Workaround: Avoid pasting configuration files to the 1-port channelized OC-12/STM-4 (DS1/E1)
ISE line card. If this is not an option, there is no workaround.