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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(33)S1
Further Problem Description: If you configure "aggregate-address" lines after BGP convergence has
been achieved, the BGP process only holds about 60 or 80 percent of the CPU for about 1 minute.
However, if you do peer reset after "aggregate-address" entries have been configured, the
convergence time is about 32 minutes (it is about 6 minutes if "aggregate-address" entries are
removed).
• CSCse50781
Symptoms: After executing the no ipv6 multicast-routing command on a dual-RP router, IPC
communication to the standby RP may be broken, and the following messages may be seen every
minute:
%IPCGRP-3-ERROR: standby set time: timeout seen
Conditions: This symptom is observed on a Cisco 12000 series router that is running the
c12kprp-p-mz image of Cisco IOS Release 12.0(32)SY.
Workaround: Reload the router.
Further Problem Description: This bug is seen only while operating in SSO mode (not in RPR
mode).
• CSCse56501
A device running Cisco IOS software that has Internet Protocol version 6 (IPv6) enabled may be
subject to a denial of service (DoS) attack. For the device to be affected by this vulnerability the
device also has to have certain Internet Protocol version 4 (IPv4) User Datagram Protocol (UDP)
services enabled. To exploit this vulnerability an offending IPv6 packet must be targeted to the
device. Packets that are routed throughout the router can not trigger this vulnerability. Successful
exploitation will prevent the interface from receiving any additional traffic. The only exception is
Resource Reservation Protocol (RSVP) service, which if exploited, will cause the device to crash.
Only the interface on which the vulnerability was exploited will be affected.
Cisco is providing fixed software to address this issue. There are workarounds available to mitigate
the effects of the vulnerability.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20080326-IPv4IPv6.shtml
• CSCse75697
Symptoms: When an ATM interface is configured with an IMA group and when you enter the clock
source line command, the router may crash.
Conditions: This symptom is observed on a Cisco router that integrates the fixes for caveats
CSCin90422 and CSCsb68536.
Workaround: There is no workaround.
Further Problem Description: The symptom occurs because the default clocking has been changed
to "internal" via the fixes for caveats CSCin90422 and CSCsb68536. The fix for this caveat,
CSCse75697, sets the default clocking back to "line."
• CSCse92050
Symptoms: A router may reload unexpectedly when a routing event causes multicast boundary to be
configured on a Reverse Path Forwarding (RPF) interface.
Conditions: This symptom is observed on a Cisco platform that is configured for PIM.
Workaround: Remove multicast boundary from the configuration.
• CSCsg08751
Symptoms: Route Switch Processor (RSP) may crash when flash card is removed from RSP slot.
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