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905
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(30)S4
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.
CSCei04350
Symptoms: MVPN PIM neighbors that are associated with both a 1-port channelized OC-48 ISE line
card and a 1-port channelized OC-12 (DS1) ISE line card bounce when you perform a
microcode-reload of a 1-port channelized OC-12 (DS1) ISE line card.
Conditions: This symptom is observed on a Cisco 12000 series.
Workaround: There is no workaround.
CSCei07556
Symptoms: The PPP protocols flap on a 64K-port of an interface of a 1-port channelized
OC-12/STM-4 (DS1/E1) ISE line card that is configured for CoS and that is congested.
Conditions: This symptom is observed when two Cisco 12000 series are connected back-to-back,
when the routers are connected via 1-port channelized OC-12/STM-4 (DS1/E1) ISE line cards, and
when you send real-time traffic.
Workaround: Change the QoS output policy to prevent traffic from being for longer than 10 seconds
and enable keepalive packets to time out.
Further Problem Description: The symptom does not occur when you do not send real-time traffic.
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.
CSCei07946
Symptoms: When the active rate for a destination PE router is evenly distributed at 4 pps for 20 flows
and the active rate for a destination CE router is evenly distributed at 4 pps for 19 flows, one flow
is reported at twice that rate (that is, 8 pps).
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