Cisco Cisco IOS Software Release 12.4(23) Notas de publicación
565
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(8)
Conditions: This symptom is observed on a Cisco router that runs a Cisco IOS software image that
is earlier than Release 12.4(8) and that is configured for IP Multicast when some interfaces on the
router are configured for PIM. The symptom occurs when the serial interface that is brought up on
the neighboring router is configured for PIM and the connecting interface on the Cisco router is not
configured for PIM.
is earlier than Release 12.4(8) and that is configured for IP Multicast when some interfaces on the
router are configured for PIM. The symptom occurs when the serial interface that is brought up on
the neighboring router is configured for PIM and the connecting interface on the Cisco router is not
configured for PIM.
Workaround: Depending on the desired operation for the link, either enable PIM at both ends or
disable PIM at both ends.
disable PIM at both ends.
TCP/IP Host-Mode Services
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CSCee73956
Symptoms: The Generalized TTL Security Mechanism (GTSM), formerly known as BGP TTL
Security Hack (BTSH), checks the time-to-live (TTL) value of the packets at the application level,
which is not efficient. Also, GTSM does not stop the establishment of a TCP connection for a packet
with an invalid TTL value.
Security Hack (BTSH), checks the time-to-live (TTL) value of the packets at the application level,
which is not efficient. Also, GTSM does not stop the establishment of a TCP connection for a packet
with an invalid TTL value.
Conditions: This symptom is observed on a Cisco platform that has the neighbor neighbor-address
security ttl hops hop-count command configured in a BGP environment.
security ttl hops hop-count command configured in a BGP environment.
Workaround: There is no workaround.
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CSCek12203
Symptoms: When you enter the copy ftp disk command, the copy operation may fail and cannot be
terminated, further copy commands may fail, and a TCP vty session for the purpose of
troubleshooting the situation may fail and cannot be terminated.
terminated, further copy commands may fail, and a TCP vty session for the purpose of
troubleshooting the situation may fail and cannot be terminated.
Conditions: These symptoms are observed on a Cisco platform when the FIN flag is set in the initial
ESTAB message from a neighbor. You must reload the router to recover from the symptoms.
ESTAB message from a neighbor. You must reload the router to recover from the symptoms.
Workaround: Do not enter the copy ftp disk command. Rather, enter the copy tftp disk command.
Wide-Area Networking
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CSCed51827
Symptoms: When you ping a router, the following error message is generated on the router:
%IPFAST-2-PAKSTICK: Corrupted pak header for Virtual-Access3, flags 0x80
Conditions: This symptom is observed when PPP Multilink (MLP) over L2TP is configured.
Workaround: There is no workaround.
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CSCeh64479
Symptoms: A router reloads unexpectedly when an apparent Layer Two Forwarding (L2F) packet is
received.
received.
Conditions: This symptom is observed on a Cisco 10000 series that is configured for Virtual Private
Dialup Network (VPDN). However, the symptom is not platform-specific.
Dialup Network (VPDN). However, the symptom is not platform-specific.
Workaround: There is no workaround.
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CSCej20215
Symptoms: Calls could not be placed once the router was upgraded from Cisco IOS
Release 12.3(14)T to Cisco IOS Release 12.4(3).
Release 12.3(14)T to Cisco IOS Release 12.4(3).