Cisco Cisco IOS Software Release 12.4(23)
499
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(8c)
Conditions: This symptom is observed when connected to a Cisco PGW that is running Cisco IOS
Release 9.3(2). The Cisco AS5400 is connected to the Cisco PGW that is running RLM in the
Signaling/Nailed mode.
Release 9.3(2). The Cisco AS5400 is connected to the Cisco PGW that is running RLM in the
Signaling/Nailed mode.
Also, sometimes ISDN service goes OOS, and also channel states goes to 5 which is maintenance
pending.
pending.
Workaround: When this happens, put ISDN service can be put back in service manually for
individual CIC, but channel state cannot manually be put back in service unless the whole serial
interface is bounced. This cannot be done when there is other traffic on the other b-channels.
individual CIC, but channel state cannot manually be put back in service unless the whole serial
interface is bounced. This cannot be done when there is other traffic on the other b-channels.
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CSCse34162
Symptoms: A Cisco router hangs after 5 to 10 minutes of passing traffic over a dialer interface.
Conditions: This symptom has been observed on a Cisco router running Cisco IOS Release 12.4(8)
with PPP Multilink configured on a dialer interface and traffic is passing.
with PPP Multilink configured on a dialer interface and traffic is passing.
Workaround: There is no workaround. A reboot is required to recover.
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CSCse78652
Symptoms: The queuing mode on multilink interfaces erroneously defaults to fair-queuing instead
of FIFO, causing distributed Cisco Express Forwarding (dCEF) to fail.
of FIFO, causing distributed Cisco Express Forwarding (dCEF) to fail.
Conditions: This symptom is observed on a Cisco 7500 series and occurs for all multilink interfaces.
However, the symptom is platform-independent.
However, the symptom is platform-independent.
Workaround: There is no workaround.
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CSCse81069
Symptoms: Unconfiguring the isdn service b_channel command is not taking effect. The command
is not removed from the running configuration.
is not removed from the running configuration.
Conditions: This symptom occurs when configuring the isdn service b_channel command to a state
other than the default value of 0 on the ISDN D channel.
other than the default value of 0 on the ISDN D channel.
Workaround: To remove the command, shut down the T1/E1 controller first and then unconfigure
the command under the D channel serial interface.
the command under the D channel serial interface.
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CSCsg15642
Symptoms: A PSTN Gateway unexpectedly restarts due to a lack of memory. Overtime memory
utilization increases, and the show processes memory sorted command indicates that the ISDN
process is allocating an increased amount of memory.
utilization increases, and the show processes memory sorted command indicates that the ISDN
process is allocating an increased amount of memory.
Conditions: This leak occurs when a SETUP message with Display IE is received.
Workaround: There is no workaround.
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CSCsg38412
Symptoms: When a Multilink PPP (MLP) session is established over an ISDN link, IPCP fails to
negotiate. When the debug ppp negotiation command is enabled, you can see that IPCP packets
from the peer are not processed. The output of the show interface command for the ISDN D-channel
interface shows that the input queue limit is 0.
negotiate. When the debug ppp negotiation command is enabled, you can see that IPCP packets
from the peer are not processed. The output of the show interface command for the ISDN D-channel
interface shows that the input queue limit is 0.
Conditions: This symptom is observed when the ISDN BRI or PRI interface is not configured as part
of a dialer rotary group or dialer pool and when RADIUS is used to assign the multilink bundle to
a VRF.
of a dialer rotary group or dialer pool and when RADIUS is used to assign the multilink bundle to
a VRF.
Workaround: Enter the dialer rotary-group command to assign the ISDN interface to a dialer.