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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(32)S12
• CSCsl61164
Symptoms: Router may crash @ipflow_fill_data_in_flowset when changing the flow version.
Conditions: Occurs when NetFlow is running with data export occurring while manually changing
the flow-export version configuration from version 9 to version 5 and then back again to version 9.
Workaround: Do not change the NetFlow flow version while the router is exporting data and routing
traffic.
• CSCsl67149
Symptoms: A sync issue is observed with the standby and active configuration.
Conditions: This symptom is observed on a Cisco 12000 series router that is configured for
MLPP/MFR. When an attempt is made to remove and add the members before the unprovisioning
is completed, the member is added in standby but not in active; hence the configuration sync issue.
Workaround: Add the member after the unprovisioning is completed.
• CSCsm27071
A vulnerability in the handling of IP sockets can cause devices to be vulnerable to a denial of service
attack when any of several features of Cisco IOS software are enabled. A sequence of specially
crafted TCP/IP packets could cause any of the following results:
–
The configured feature may stop accepting new connections or sessions.
–
The memory of the device may be consumed.
–
The device may experience prolonged high CPU utilization.
–
The device may reload. Cisco has released free software updates that address this vulnerability.
Workarounds that mitigate this vulnerability are available in the “workarounds” section of the
advisory. The advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20090325-ip.shtml
• CSCsm45113
Symptom: Router may install duplicate routes or incorrect route netmask into routing table. It could
happen on any routing protocol. Additionally, for OSPF, crash was observed.
Conditions: The problem is triggered by SNMP polling of ipRouteTable MIB. The problem is
introduced by CSCsj50773, see the Integrated-in field of CSCsj50773 for affected images.
Workaround: Do not poll ipRouteTable MIB, poll newer replacement ipForward MIB. instead. The
ipRouteTable MIB was replaced by ipForward MIB in RFC 1354.
Further problem description: The clear ip route * command can correct the routing table until the
next poll of ipRouteTable MIB.
• CSCsm70668
Symptoms: A soft OIR over E3:POS impacts complete traffic with a biscuit tunnel.
Condition: A soft OIR over E3:POS impacts complete traffic with a biscuit tunnel configured. In
OIR “test mbus power 6 off” and “test mbus power 6 on” are performed followed by a microcode
reload on slot 6.
Workaround: There is no workaround.
• CSCsm74769
Symptoms: if_num mismatch is seen in the uidb, sometimes along with the L2TPv3 bit set to zero.
As a result, customer saw L2TPv3 packet drops over FR in Cisco 12000 series Internet router.
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