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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(31)S3
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(31)S1 and only affects Engine 5 line cards.
Workaround: Create an SNMP View that excludes the Fabric MIB (CISCO-FABRIC-C12K-MIB).
• CSCsc30289
Symptoms: When the router at the opposite site is reloaded, a Dynamic Packet Transport (DPT) line
card crashes because of a “Bus Error exception.”
Conditions: This symptom is observed on a Cisco 12000 series when the router at the opposite site
is also configured with a DPT line card.
Workaround: There is no workaround.
• CSCsc32171
Symptoms: An Engine 2 line card that functions as a tunnel server card may crash in the
process_rx_packet_uti_inline() process when an Xconnect configuration is removed.
Conditions: This symptom is observed on a Cisco 12000 series when a dynamic L2TP session that
is configured on a tunnel server card is removed while traffic is being processed.
Workaround: There is no workaround.
• CSCsc37404
Symptoms: An Engine 6 line card may reset with the following error messages:
%IPC-5-INVALID: NACK Source Port=0x403F0000
%MCC192-3-CPU_PIF: Error=0x4
%MCC192-3-CPUIF_ERR: Packet Exceeds Programmed Length.
%GSR-3-INTPROC: Process Traceback= 40D32E5C 406D8CE0
...
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(28)S2.
Workaround: There is no workaround.
• CSCsc38678
Symptoms: When IS-IS IPv6 routes flap, a memory leak occurs on an ISE line card, eventually
causing dCEF to be disabled when no more memory is available.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with 180,000 BGP
routes and 6000 IS-IS routes, 10 percent of which flaps each 30 seconds. The symptom occurs only
when IS-IS flaps, not when BGP flaps. The symptom does not occur either when IPv6 routing is not
configured.
Workaround: There is no workaround. If this is an option, remove IPv6 routing by entering the no
ipv6 unicast-routing global configuration command. When the symptom has occurred and dCEF is
disabled, you must reload the line card to restore its memory.
• CSCsc44237
This caveat consists of two symptoms, two conditions, and two workarounds:
1. Symptom 1: A switch or router that is either configured with a PA-A3 ATM port adapter may
eventually run out of memory. The leak occurs when the FlexWAN or VIP that contains the
PA-A3 port adapter is removed from the switch or router and not re-inserted.
The output of the show processes memory command shows that the “ATM PA Helper” process
does not have sufficient memory. The output of the show memory allocating-process totals
command shows that the “Iterator” process holds the memory.
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