Cisco OL-4015-08 Manuel d'utilisateur Page 451

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803
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(31)S1
Conditions: This symptom can occur if the sending of the FPD image from RP to a line card fails
because the target card is reloaded during this time window.
Workaround: Do not reload or physically remove the target upgrade line card when performing an
FPD image upgrade.
CSCeh84320
Symptoms: The subinterface on the modular GE/FE card stops forwarding.
Conditions: This symptom occurs whenever the operator enters sub-interface mode with an
xconnect statement on the EPA-GE/FE-BBRD fixed port on the modular GE/FE card.
Workaround: While in the sub-interface mode, the operator can enter a shutdown command
followed by a no shutdown command which allows the subinterface to resume forwarding.
Each time the operator enters the sub-interface on the fixed port, the workaround will need to be
applied.
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.
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.
CSCeh97281
Symptoms: On a Cisco 12000 series on an Frame Relay subinterface on a CT3 interface, Route
Processor (RP) generated packets (such as OSPF hello) are not queued in the correct TX CoS queue.
Conditions: This issue can be seen on a Frame Relay subinterface on a CT3, when an egress MQC
policy is applied. The egress policy has to match “IP precedence 6”. In this case any RP generated
control packets with IP precedence 6 are not being enqueued to the correct class-matched queue.
Workaround: There is no workaround.
CSCeh97760
Symptoms: In the outputs of the show ip psa-cef and show ip cef commands for an Engine 2 ingress
line card, the “Local OutputQ (Unicast)” information may point to another and incorrect slot than
the slot that the global CEF table points to.
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