Specifications
1407
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
• CSCec87815
Symptoms: A buffer leak may occur in the Multilink PPP (MLP) header pool on a Versatile Interface
Processor (VIP). The speed of the leak depends on the rate of traffic that is flowing between the
interface of the VIP and the interface on the other end. The leak may eventually cause memory
allocation failures (MALLOCFAIL) on the VIP and may result in memory fragmentation.
Conditions: This symptom is observed on a Cisco 7500 series when all of the following conditions
are present:
–
Distributed Cisco Express Forwarding (dCEF) is enabled.
–
An MLP bundle that includes interfaces on the VIP is configured.
–
A different interface on the same VIP performs some type of fancy queueing such as committed
access rate (CAR), policing, or Class-Based Weighted Fair Queueing (CBWFQ).
–
Packets are locally switched between the MLP interface and the interface that is configured for
fancy queueing.
Workaround: Stop the leak by removing the fancy queueing from the VIP interface.
Alternate Workaround: Move the MLP interfaces to a different VIP that does not have an interface
that performs fancy queueing.
• CSCec87862
Symptoms: A Cisco router may experience a Parallel Express Forwarding (PXF) reload, and the
following error messages may appear in the log:
%TOASTER-2-FAULT: T0 Local Bus Exception: CPU[t0r2c2] CM at 0x0A00 LR 0x0A6
%TOASTER-2-FAULT: T0 Exception summary: CPU[t0r2c2] Stat=0x00000022 HW=0x00000000
LB=0x00000040 SW=0x00000000
Conditions: This symptom is observed on a Cisco 10720 router that is running the c-10700-p-m
image of Cisco IOS Release 12.0(24)S3.
Workaround: There is no workaround.
• CSCec89886
Symptoms: Traffic that flows on the first path or access unit (AU) controller (on each physical port)
of a 4-port channelized OC3 STM-1 line card may stop after a Performance Routing Engine (PRE)
cutover. Other paths or AUs may not be affected.
Conditions: This symptom is observed on a Cisco 10000 series.
Workaround: There is no workaround.
• CSCed00798
Symptoms: Packets may be dropped at the output interface on a Cisco router.
Conditions: This symptom is observed on a Cisco 10720 router when there is PPP encapsulation on
the incoming interface and the packets have Multiprotocol Label Switching (MPLS) labels.
Workaround: Disable PPP encapsulation, and use High-Level Data Link Control (HDLC) for the
incoming interface.
• CSCed01648
Symptoms: When an interface is shut down and the router reloads, the shutdown interface
configuration command disappears from the running configuration and the interface becomes active
again. However, the shutdown command is still in the startup configuration.
Conditions: This symptom is observed on a Cisco 10000 series.
Workaround: Shut down the interface each time after the router reloads.