Specifications

1381
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
Conditions: This symptom is observed when the traffic is switched from the input interface by using
fast switching rather than Cisco Express Forwarding (CEF).
Workaround: Configure CEF or distributed CEF (dCEF) on the input interface.
• CSCea88987
Symptoms: A Cisco 10000 series does not support the 16-byte Path Trace Buffer (PTB) for
Synchronous Digital Hierarchy (SDH) framing, which may cause difficulties for other platforms.
Conditions: This symptom is observed on a Cisco 10000 series. The Cisco 10000 series does support
a 64-byte PTB in which information is exchanged (IP address, chassis name, and so on).
Workaround: There is no workaround.
• CSCeb01400
Symptoms: At least 30 percent of the CPU of a Performance Routing Engine 1 (PRE-1) may be
utilized to process flows, causing the number of packets that are processed per second to be much
lower than you would expect.
Conditions: This symptom is observed on a Cisco 10000 series when NetFlow and NetFlow export
are enabled and when there is a large number of flows (more than 10,000).
Workaround: Disable NetFlow.
Alternate Workaround: Reduce the number of entries in the NetFlow cache of the Route Processor
(RP) by entering the ip flow-cache entries 1024 global configuration command. Doing so reduces
the load of the CPU of the PRE-1. Note that the primary cache is located on the Parallel Express
Forwarding (PXF) processor and supports a fixed number of 512 entries.
• CSCeb04441
Symptoms: When an ATM link flaps or a remote ATM platform reloads, a Fast Etherchannel may
fail and Enhanced Interior Gateway Routing Protocol (EIGRP) neighbors that are connected via the
Fast Etherchannel may be lost.
Conditions: This symptom is observed on a Cisco 7500 series that runs the rsp-pv-mz image of
Cisco IOS Release 12.0(21)S5.
Workaround: There is no workaround.
• CSCeb16876
Symptoms: A Cisco router may generate a “SYS-2-GETBUF” message during the “Tag Input”
process and may reload unexpectedly.
Conditions: This symptom is observed when the router fragments a Multiprotocol Label Switching
(MPLS) packet.
Workaround: There is no workaround.
• CSCeb18492
Symptoms: When a new interface or subinterface is added, the following error message may appear
on the console:
ACLs could not add IDB to list
If you have dual Route Processors (RPs), this message appears on the console of both RPs. This
situation may lead to incorrect access control list (ACL) behavior when the ACL is modified or when
a uCode reload occurs.
Conditions: This symptom is observed on a Cisco 10000 series when a new interface that is
configured with an access control list (ACL) is added after an old interface that was also configured
with an ACL has been deleted. The symptom does not occur when the old interface that is deleted
was not configured with an ACL.