Cisco Cisco IOS Software Release 12.4(4)T
1099
Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
Resolved Caveats—Cisco IOS Release 12.4(9)T4
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CSCsh35269
Symptoms: When using MTP on a Cisco IOS router, there could be RTP ports and rtpspi callegs
hanging. Over time, the hanging RTP ports can accumulate and cause the router to run out of RTP
ports, so MTP calls will fail.
hanging. Over time, the hanging RTP ports can accumulate and cause the router to run out of RTP
ports, so MTP calls will fail.
Conditions: This symptom has been observed when using software MTP for supplementary services
or when there is a high number of calls per second (CPS).
or when there is a high number of calls per second (CPS).
Workaround: Reload the router to release hanging ports.
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CSCsh42337
Symptoms: A Cisco IOS router with DSPRM crashes with an out of buffer error under load.
Conditions: This symptom has been observed on a Cisco 2811 chassis with NM-HDV2 having four
T1 connections, PVDM2-64 (4 DSP), and 768 MB RAM. With this setup, create 96 SIP G.729
dial-peers, make calls and start sending voice traffic. Also, create 96 multicast G.711 dialpeers and
start traffic.
T1 connections, PVDM2-64 (4 DSP), and 768 MB RAM. With this setup, create 96 SIP G.729
dial-peers, make calls and start sending voice traffic. Also, create 96 multicast G.711 dialpeers and
start traffic.
Workaround: There is no workaround.
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CSCsh75827
Symptoms: When a router that has the ssg intercept dhcp command enabled receives a DHCP
packet from a host that has already logged out from a Subscriber Edge Services Manager (SESM),
the router may unexpectedly reload because of a bus error.
packet from a host that has already logged out from a Subscriber Edge Services Manager (SESM),
the router may unexpectedly reload because of a bus error.
Conditions: This symptom is observed on a Cisco router that functions as an SSG with PBHK
enabled, when a host has received an IP address that is associated with a service (via the "J"
Service-Info attribute), has logged out from the SESM, and then renews its IP address.
enabled, when a host has received an IP address that is associated with a service (via the "J"
Service-Info attribute), has logged out from the SESM, and then renews its IP address.
Workaround: There is no workaround.
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CSCsh84171
Symptoms: A router is crashing due to memory corruption with following message:
%SYS-3-OVERRUN: Block overrun at 3F379450 (red zone 2A2A2A2A)
Conditions: This symptom has been observed on a Cisco 2800 router running Cisco IOS
Release 12.4T.
Release 12.4T.
Workaround: There is no workaround.
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CSCsh94757
Symptoms: The radius-server, which is used for accounting, is marked dead.
Conditions: When radius extended source ports is used, the new extended ports may potentially
overlap with UDP port range of other applications. An example of this is when the router is also
seeing UDP packets for RTP such as in an IP-to-IP Gateway setup.
overlap with UDP port range of other applications. An example of this is when the router is also
seeing UDP packets for RTP such as in an IP-to-IP Gateway setup.
Workaround: Remove the radius-server source-ports extended command from the configuration.
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CSCsi01470
A vulnerability in the Cisco implementation of Multicast Virtual Private Network (MVPN) is
subject to exploitation that can allow a malicious user to create extra multicast states on the core
routers or receive multicast traffic from other Multiprotocol Label Switching (MPLS) based Virtual
Private Networks (VPN) by sending specially crafted messages.
subject to exploitation that can allow a malicious user to create extra multicast states on the core
routers or receive multicast traffic from other Multiprotocol Label Switching (MPLS) based Virtual
Private Networks (VPN) by sending specially crafted messages.
Cisco has released free software updates that address this vulnerability. Workarounds that mitigate
this vulnerability are available.
this vulnerability are available.
This advisory is posted at
.