Cisco Cisco IOS Software Release 12.4(4)T
1095
Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
Resolved Caveats—Cisco IOS Release 12.4(9)T5
The symptom occurs for H.323 calls only when a separate TCP session is established for the H.245
session. When H.245 tunneling is enabled or no H.245 session is established, the symptom does not
occur for H.323 calls.
session. When H.245 tunneling is enabled or no H.245 session is established, the symptom does not
occur for H.323 calls.
When the debug ip tcp transaction command is enabled on the gateway, the "TCP: Ran out of ports
for network 0" debug output is generated when the symptom occurs.
for network 0" debug output is generated when the symptom occurs.
Enabling debugs on a Cisco IOS gateway should always be done with caution to minimize impact
to the performance of the router. As a minimum, ensure that logging to the console is changed from
the default behavior of the debug level to, for example, an informational level.
to the performance of the router. As a minimum, ensure that logging to the console is changed from
the default behavior of the debug level to, for example, an informational level.
Workaround: After the symptom has occurred, reload the Cisco IOS VoIP gateway. To prevent the
symptom from occurring, ensure that for H.323 call processing all H.323 devices have H.245
tunneling enabled. This may not always be possible: for example, H.245 tunneling on
Cisco CallManager is not supported.
symptom from occurring, ensure that for H.323 call processing all H.323 devices have H.245
tunneling enabled. This may not always be possible: for example, H.245 tunneling on
Cisco CallManager is not supported.
Wide-Area Networking
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CSCsh06841
Symptoms: A router may crash while establishing a PPP session.
Conditions: This symptom is observed when the ppp reliable-link interface configuration command
is enabled on an interface that is bound to a dialer profile.
is enabled on an interface that is bound to a dialer profile.
Workaround: Disable the ppp reliable-link interface configuration command, save the
configuration, and reload the router. Disabling the command without reloading the router is not
sufficient.
configuration, and reload the router. Disabling the command without reloading the router is not
sufficient.
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CSCsi27449
Symptoms: A Non-Facility Associated Signaling (NFAS) configuration with a back-to back PRI
connection may fail and an "L3_GetUser_NLCB EVENT 0X2 No NLCB 2" error message may be
generated, that is, a ping from the client to the router mail fail.
connection may fail and an "L3_GetUser_NLCB EVENT 0X2 No NLCB 2" error message may be
generated, that is, a ping from the client to the router mail fail.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS interim
Release 12.4(13.11) when an interface is configured as a dialer interface. The symptom may also
affect Release 12.4T.
Release 12.4(13.11) when an interface is configured as a dialer interface. The symptom may also
affect Release 12.4T.
Workaround: There is no workaround.
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CSCsi74960
Symptoms: A router crashes while sending large control packets between client and L2TP Network
Server (LNS) in L2TP callback scenario.
Server (LNS) in L2TP callback scenario.
Conditions: This symptom happens with a Cisco 7200 router that is running Cisco IOS interim
Release 12.4(13.13)T1.
Release 12.4(13.13)T1.
Workaround: There is no workaround.
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CSCsj10593
Symptoms: A terminating gateway (TGW) that is configured for Cisco ISDN Interconnect for Voice
Gateways Solution may crash.
Gateways Solution may crash.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS interim
Release 12.4(15.6) and that functions as a TGW with all PRI switch types from the user to the
network side. The symptom occurs when the isdn test call interf ace interface-number
dialing-string command is entered at the platform on which the call is initiated, when the originating
Release 12.4(15.6) and that functions as a TGW with all PRI switch types from the user to the
network side. The symptom occurs when the isdn test call interf ace interface-number
dialing-string command is entered at the platform on which the call is initiated, when the originating