Specifications

1351
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S2
Conditions: This symptom observed on a Cisco 12000 series when there are link-bundle
subinterfaces configured on the 4-port ISE Gigabit Ethernet line card. A list of the affected releases
can be found at http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCed63480.
Cisco IOS software releases that are not listed in the “First Fixed-in Version” field at this location
are not affected.
Workaround: There is no workaround.
• CSCee40349
Symptoms: Cisco 12816 and 12810 routers need to have specific MBSU 5v and on- board 5v
thresholds other than the values in the legacy system. Otherwise, there may be error messages in the
console logs that complain that the voltages are abnormal.
Conditions: This symptom is observed on Cisco 128xx series routers.
Workaround: The no show environment command can be configured, but only if this problem is
seen.
• CSCee41728
Symptoms: Some voltage threshold levels may not be set correctly and may cause a line card to
power down without any warning messages if the voltage drops below 3v. Note: There has been no
reports of this happening yet.
Conditions: This symptom is observed on Cisco 12000 series routers.
Workaround: The no show environment command can be configured, but only if this problem is
seen.
• CSCee42198
Symptoms: Engine 4+ loadsharing does not work correctly in a VPN imposition situation. The
problem is not seen with Engines 0, 2 and 3.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(27)S when traffic enters on a VRF interface and is loadshared over four links to the
core. Traffic is loadshared over only two of the four links.
Workaround: Use three-path loadbalancing.
• CSCee43855
Symptoms: Starting with Cisco IOS Release 12.0(26)S, the Cisco 10720 router supports the IPv6
ACL feature. The IPv6 packets are corrupted (including the IPv6 header) for the following scenario:
For a packet in 6PE decapsulation case (MPLS to IPv6), if output ACLs are applied at the output
interface and these ACLs are long enough to require a second PXF pass (known as output ACL split
case), then the outgoing IPv6 packet is corrupted.
Conditions: This symptom is observed on Cisco 10720 routers that are running Cisco IOS
Release 12.0(26)S or later releases.
Workaround: There is no workaround.
• CSCee55457
Symptoms: When the channel-group is removed on the controller, class-default queue gets stuck on
next time slot/channel (removed channel+1).
Conditions: This symptom is observed on a Cisco 10000 series that is configured with 24-port
channelized E1/T1 line cards with high traffic rate on removed channel.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command.