Specifications

1070
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S6
Conditions: This symptom is observed on a Cisco platform that is configured for IPv6 when there
are more than eight paths for one IPv6 prefix. The symptom is platform-independent and not
release-specific.
Workaround: There is no workaround.
• CSCeh50638
Symptoms: A 4-port Gigabit Ethernet ISE line card may crash.
Conditions: This symptom is observed on a Cisco 12000 series that is configured for multicast
traffic.
Workaround: There is no workaround.
• CSCei01644
Symptoms: A 3-port Gigabit Ethernet (3GE-GBIC-SC) line card that is configured for Fast-Path
Multicast Forwarding may reset when receiving specific packets. However, it is not necessary that
the line card will crash all times. The resulting action on these packets could result in a simple drop
as well.
Conditions: This symptom is observed on a Cisco 12000 series when a packet with an IP destination
address from the reserved multicast range (224.0.0.xxx) and a TTL larger than 1 is received on the
3GE-GBIC-SC line card and when multicast hardware acceleration is enabled.
Normally, the TTL should be 1 if the destination address is part of the reserved multicast range.
Workaround: Enter the no hw-module slot slot-number ip multicast hw-accelerate source-table
size 16 offset 0 command.
• CSCei07805
Symptoms: When a router has a large VRF configuration and a lot of routing information, the
following error messages may be generated during an SSO switchover:
%FIB-3-FIBDISABLE: Fatal error, slot/cpu 5/0: keepalive failure
The following CPUHOG error message and traceback may also be generated:
%SYS-3-CPUHOG: Task is running for (2000)msecs, more than (2000) msecs
(272/145),process = IPC LC Message Handler.
-Traceback= 40EAF5D8 411DBE94 411DBFB8 411DC5D0 411DEFEC 411DEE90 411E0200 41093100
410932B8
After the FIBDISABLE error messages has been generated, the router may no longer function
properly.
Conditions: This symptom is observed on a Cisco 7600 series but is platform-independent.
Workaround: There is no workaround.
• CSCei19563
Symptoms: A faulty PRE may unexpectedly switch from standby mode to active mode, causing the
active PRE to crash.
Conditions: This symptom is observed on a Cisco 10000 series that has dual PREs and that runs
Cisco IOS Release 12.0(25)SX6 but may also occur in Release 12.0S.
Workaround: Remove the faulty PRE.
• CSCei30764
Symptoms: A PE router that is configured with many (100 or more) Multicast VRFs (mVRFs) may
create multiple MDT tunnels for one mVRF.