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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(33)S3
• CSCei45749
Symptoms: When you enter the clear interface command on an Inverse Multiplexing for ATM
(IMA) interface configured for dynamic bandwidth, the PVCs that are associated with the IMA
interface may become Inactive.
Conditions: This symptom is observed only for IMA interfaces that have the atm bandwidth
dynamic command enabled.
Workaround: Issuing the no atm bandwidth dynamic command from the IMA interface can
prevent the problem from happening. If the problem has been experienced already, using the no atm
bandwidth dynamic command followed by a shutdown and subsequent no shutdown from the
IMA interface can be used to work around the problem and clear the inactive PVC condition.
• CSCek77589
Symptoms: The following message is observed in syslog/console.
%UTIL-3-IDTREE_TRACE: SSM SEG freelist DB:Duplicate ID free
Conditions: This symptom was observed during scalability testing of a large number (over 2000) of
PPP sessions being brought up and torn down continuously.
Workaround: There is no workaround.
• CSCir01027
Symptoms: SNMP over IPv6 does not function.
Conditions: This symptom is observed on a Cisco router that integrates the fix for caveat
CSCsg02387. A list of the affected releases can be found at
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsg02387. Cisco IOS
software releases that are not listed in the “First Fixed-in Version” field at this location are not
affected.
Workaround: Use SNMP over IPv4.
• CSCsd23579
Symptoms: On PPP links that do not support duplicate address detection (DAD), the interface up
state can be signaled too early, for example before the interface is actually up. As a result, OSPFv3
neighbor relationship is not established.
Conditions: Any interface that does not support DAD could signal link local up before the interface
is up.
Workaround: There is no workaround.
• CSCsd47863
Symptoms: Summary Refresh messages are not sent downstream; consequently, the downstream
router notices missing refreshes, and, after some time, the tunnel goes down.
Conditions: This symptom is observed when there is an alternate FRR path and it becomes active.
The router that has refresh reduction enabled creates the problem. The command that creates the
problem is:
ip rsvp signalling refresh reduction
Workaround: Disable Refresh Reduction on the router using the following command:
no ip rsvp signalling refresh reduction
Further Problem Description: When an incoming interface on a router is shut down, FRR is
triggered, and tunnels takes another path.
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