Cisco Cisco IOS Software Release 12.4(4)T
1284
Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
Resolved Caveats—Cisco IOS Release 12.4(4)T8
Conditions: This symptom is observed on a Cisco gateway that runs Cisco IOS Release 12.4(9)T4
or a later release and that is connected to a SIP endpoint.
or a later release and that is connected to a SIP endpoint.
Workaround: There is no workaround. Note that the symptom does not occur in Release 12.4(9)T3.
TCP/IP Host-Mode Services
•
CSCse05736
Symptoms: A router that is running RCP can be reloaded by a specific packet.
Conditions: This symptom is seen under the following conditions:
–
The router must have RCP enabled.
–
The packet must come from the source address of the designated system configured to send RCP
packets to the router.
packets to the router.
–
The packet must have a specific data content.
Workaround: Put access lists on the edge of your network blocking RCP packets to prevent spoofed
RSH packets. Use another protocol such as SCP. Use VTY ACLs.
RSH packets. Use another protocol such as SCP. Use VTY ACLs.
Wide-Area Networking
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CSCek28604
Symptoms: A Cisco device may reload (“System returned to ROM”) unexpectedly due to a memory
leak in the ISDN L2 process.
leak in the ISDN L2 process.
Conditions: This symptom is observed on a Cisco device that functions in a call manager-backhaul
configuration after running under stress for about 24 hours.
configuration after running under stress for about 24 hours.
The output of the show processes memory, collected in regular intervals shows a memory leak in
the ISDN L2 process. The amount of memory that is held by the ISDN L2 process will be very large
and growing.
the ISDN L2 process. The amount of memory that is held by the ISDN L2 process will be very large
and growing.
Workaround: Enter the isdn k 1 command on all backhauled serial interfaces.
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CSCse79994
Symptoms: BRI Layer 2 remains in the ESTABLISH_AWAITING_TEI state instead of entering the
MULTIPLE_FRAME_ESTABLISHED state.
MULTIPLE_FRAME_ESTABLISHED state.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS interim
Release 12.4(9.19a).
Release 12.4(9.19a).
Workaround: There is no workaround.
•
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.