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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(30)S5
Conditions: This symptom is observed on a Cisco 12000 series that is configured for mVPN, that
uses an Engine 3 line card for imposition, and that uses an Engine 4+ line card for disposition.
Workaround: Reload the router.
CSCei41469
Symptoms: The standby PRP crashes when you apply an IPv6 ACL on an interface of an ISE line
card.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with redundant
PRPs.
Workaround: There is no workaround.
CSCei48728
Symptoms: New subinterfaces and duplicate IP addresses are unexpectedly created for member
interfaces of a port-channel subinterface.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with dual Route
Processors that function in RPR mode when a clock and scheduler card (CSC) is shut down before
an RPR switchover occurs.
Workaround: There is no workaround.
CSCei51504
Symptoms: When you run an SNMP get or walk on the ifOperStatus object on a 1-port CHOC-12
OC-3 ISE line card, the status for the STS-1 path interface shows down although the channel is up.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(28)S3.
Workaround: There is no workaround.
CSCei58551
Symptoms: A 1-port OC-192 Engine 4+ line card (OC192E/POS) or a Modular GbE Engine 4+ line
card (EPA-GE/FE-BBRD with EPA-3GE-SX/LH-LC) may crash when an SSO switchover occurs or
when the router reloads.
Conditions: This symptom is observed on a Cisco 12000 series that runs a c12kprp-p-mz image of
Cisco IOS Release 12.0(31)S and that has two RPs.
Workaround: There is no workaround.
CSCei62762
Symptoms: Router may generate and/or forward crafted IP packets with the source IP address being
the routers tunnel interface for GRE or mGRE tunnels. Incorrect packet decoding may be seen with
“debug tunnel.
Conditions: The router needs to receive a specially crafted GRE packet sent to the tunnel end-point.
The outer IP packet must come from the configured tunnel source and be sent to the configured
tunnel destination IP address Present Routed bit must be set to 1.
Workaround: Upgrade Cisco IOS to a version containing fixes for: CSCuk27655 or CSCea22552 or
CSCei62762.
Further information: On the 6th September 2006, Phenoelit Group posted an advisory:
* Cisco Systems IOS GRE decapsulation fault
Cisco’s statement and further information are available on the Cisco public website at:
http://www.cisco.com/warp/public/707/cisco-sr-20060906-gre.shtml
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