Specifications

1294
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S3
• CSCed33110
Symptoms: A VIP crash may cause memory exhaustion on an RSP, which in turn may cause the RSP
to crash.
Conditions: This symptom is observed more frequently on routers with a high IDB count.
Workaround: There is no workaround.
• CSCed75238
Symptoms: A serial interface on a Cisco 7500 series may stop transmitting traffic and may report
the following VIP crashes: 1
Conditions: This symptom is observed on a Cisco 7500 series that runs Cisco IOS Release 12.3(5a)
but may also occur in other releases. This symptom is not observed in Release 12.1(8c).
Workaround: There is no workaround.
• CSCed86286
Symptoms: A router may reload due to a software-forced crash.
Conditions: This symptom is observed on a Cisco 3745 that runs Cisco IOS Release 12.2(13)T5 and
that has SSH configured. However, the symptom may occur on other platforms that run other
releases and that do not have SSH configured.
Workaround: There is no workaround.
• CSCee04316
Symptoms: A TN-2-BADCONN message may appear in the log and may be quickly followed by an
FIB Disable message, indicating that distributed CEF is disabled on all VIPs. The IPC buffers usage
may grows very large (up to 600 MB) and these buffers may not be reclaimed.
Conditions: This symptom is observed on a Cisco 7500 series that runs Cisco IOS
Release 12.0(26)S1 and that has a very large BGP table and several VRFs.
Workaround: Reload the router to restore normal operation.
• CSCee35740
Symptoms: After a VIP crashes, a FIB-3-FIBDISABLE error message due to an IPC timeout may
occur for all the slots of the VIP.
Conditions: This symptom is observed on a Cisco 7500 series after the VIP crashes and before the
VIP recovers. The FIB-3-FIBDISABLE error message is generated for all the slots of the VIP,
causing dCEF switching to become disabled.
Workaround: There is no workaround. You can reenable dCEF by entering the clear cef linecard
command.
• CSCee39972
Symptoms: A Cisco router may experience a memory leak in the IPC buffers:
Interface buffer pools: IPC buffers, 4096 bytes (total 41664, permanent 624): 0 in free list (208 min,
2080 max allowed) 3339198 hits, 75195 fallbacks, 0 trims, 41040 created 4254 failures (65497 no
memory)
You can also see that the Pool Manager process is holding onto more and more memory:
PID TTY Allocated Freed Holding Getbufs Retbufs Process 5 0 246913476 44522964 202605044
176561380 2654280 Pool Manager
Conditions: This symptom is observed on a Cisco 7500 series that runs Cisco IOS
Release 12.0(26)S or 12.0(26)S1. The memory leak is triggered by the SNMP polling of specific
OIDs within the ciscoEnhancedMemPoolMIB MIB.