Cisco Cisco IOS Software Release 12.4(23)
674
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(5c)
Workaround: There is no workaround.
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CSCsd33445
Symptoms: A Cisco platform that is configured for Next Hop Resolution Protocol (NHRP) may
display an error message similar to the following:
display an error message similar to the following:
%SYS-3-MGDTIMER: Running timer, init, timer = 0xXXXXXXXX Process= "NHRP", ipl= 0, pid=
YYY
Conditions: This symptom is observed in a DMVPN environment.
Workaround: There is no workaround.
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CSCse29428
Symptoms: A crash is seen with %ALIGN-1-FATAL after showing %SYS-2-
CHUNKEXPANDFAIL and %SYS-2-MALLOCFAIL repeatedly.
CHUNKEXPANDFAIL and %SYS-2-MALLOCFAIL repeatedly.
Conditions: This symptom is observed on a Cisco 3725 router that is running Cisco IOS
Release 12.4(5a) with the c3725-advipservicesk9-mz image that is running IPSec VPN.
Release 12.4(5a) with the c3725-advipservicesk9-mz image that is running IPSec VPN.
Workaround: There is no workaround.
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CSCse64256
Symptoms: When a First Hop Router receives (S,G) stream for an Embedded RP group, the router
crashes while trying to send register packets.
crashes while trying to send register packets.
Conditions: This symptom has been observed on a First Hop Router.
Workaround: There is no workaround.
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CSCse98590
Symptoms: The router will display SYS-2-MALLOCFAIL messages on the console, and various
protocols will operate erratically as a result of a low memory condition.
protocols will operate erratically as a result of a low memory condition.
Conditions: When a router has to duplicate incoming IPv4 multicast packets for transmission on
multiple interfaces, and one of those interfaces is a GRE tunnel operating in GRE IPv6 mode, then
memory used to duplicate that packet stream will not be freed. As a result, the router will soon
exhaust all available memory.
multiple interfaces, and one of those interfaces is a GRE tunnel operating in GRE IPv6 mode, then
memory used to duplicate that packet stream will not be freed. As a result, the router will soon
exhaust all available memory.
Workaround: The router will not exhaust memory if packets do not need to be duplicated (for
example, if they enter on one interface and only exit the box through another interface), or if they
do not need to duplicate to a tunnel interface that is running GRE over IPv6 (for example, tunnel
mode GRE IPv4 does not have this problem).
example, if they enter on one interface and only exit the box through another interface), or if they
do not need to duplicate to a tunnel interface that is running GRE over IPv6 (for example, tunnel
mode GRE IPv4 does not have this problem).
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CSCsh02161
Symptoms: A Route Reflector (RR) does not withdraw a prefix that redistributes itself even if this
prefix is removed from the BGP table.
prefix is removed from the BGP table.
Condition: This symptom is observed on a Cisco router that functions as an RR that advertises two
of the same prefixes with different Route Distinguishers (RDs) when one of these prefixes
redistributes itself and when the other prefix is a route that is learned from an RR client via iBGP.
of the same prefixes with different Route Distinguishers (RDs) when one of these prefixes
redistributes itself and when the other prefix is a route that is learned from an RR client via iBGP.
Workaround: There is no workaround.
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CSCsh80678
Symptoms: New or flapping IGP routes may be injected into BGP even though no corresponding
network statements exist.
network statements exist.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.3(22) or a
later release when the auto-summary command is enabled for BGP.
later release when the auto-summary command is enabled for BGP.
Workaround: Enter the no auto-summary command.