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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(32)S
CSCeh84740
Symptoms: An RPR+ switchover may cause a VIP or line card to pause indefinitely.
Conditions: This symptom is observed when a high load of traffic passes through interfaces of a VIP
or line card when these interfaces are configured for QoS.
Workaround: There is no workaround.
CSCeh90984
Symptoms: When you enter the clear cef linecard command, CEF may be disabled on a POS ISE
line card and does not recover by itself.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(28)S3.
Workaround: Reload the line card.
CSCeh91772
Symptoms: If an existing file is extended, an ATA file system may become corrupted. When this
situation occurs, the output of the dir command or of a show command does not list the files because
the files are corrupted.
Conditions: This symptom is observed when you enter any command that extends a file such as the
show interfaces ethernet | append disk0:file command.
Workaround: Do not enter a command that extends a file.
CSCeh97080
Symptoms: When Multiprotocol Label Switching (MPLS) is enabled on a router, one or more LDP
sessions may be disrupted during periods of extremely high CPU use.
Conditions: This symptom is observed when the CPU use of the router temporarily increases to more
than 90 percent for several tens of seconds and when one or more high-priority processes are
frequently active but do not necessarily use many CPU cycles.
For example, high CPU use may occur when a peer router is reloaded or when an interface with
several hundreds of numbered IP subinterfaces comes up, which causes many processing changes
on the router because of the “Tagcon Addr” process.
On a Cisco 12000 series, high CPU use may occur because of the “Fabric ping” high-priority
process, which is frequently active.
Other high-priority processes may also cause the symptom to occur.
Workaround: To increase the length of the hello adjacency holdtimes, enter the mpls ldp discovery
hello holdtime command on the affected router. You may need to enter this command on all
platforms in the network in order to provide full protection.
CSCeh97671
Symptoms: When an RP switchover occurs, the standby RP crashes, causing the switchover
downtime to be longer than expected and traffic to be affected.
Conditions: This symptom is observed on a Cisco 12000 series that is configured for HA when you
perform an RP switchover, when the active RP runs Cisco IOS Release 12.0(28)S4, and when the
standby RP runs a Cisco IOS interim release later than Release 12.0(31)S.
Workaround: There is no workaround.
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