Specifications

1184
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S1
• CSCef08388
Symptoms: After a forced switchover, if you shut down a POS interface and save the configuration,
the shutdown command does not show for this interface in the output of the show running-config
command even though the output of the show ip interface brief shows that this interface is in the
DOWN/DOWN state.
Conditions: The symptom is observed on a Cisco 12410 and Cisco 12416 that run Cisco IOS
Release 12.0(25)S4. The symptom does not occur for a Gigabit Ethernet interface.
Workaround: There is no workaround.
• CSCef08774
Symptoms: Certain types of fragmented packets are dropped when the ingress line card is an E6 line
card and the egress line card is an E4+ line card. (CSCed22100 addresses this symptom for the E4+
line card.)
Conditions: This symptom is observed on a Cisco 12000 series when there is an Engine 1 GE line
card along the path before the traffic enters the E6 line card and when this Engine 1 GE line card
does not have any features enabled.
Workaround: Configure a feature such as Sampled NetFlow on the Engine 1 GE line card.
• CSCef09884
Symptoms: The RP that is supposed to become the primary RP may crash when an RP switchover
occurs.
Conditions: This symptom is observed on a Cisco 12000 series that runs a Cisco IOS interim release
of Release 12.0(26)S3. This caveat is resolved in Release 12.0(26)S3.
Workaround: There is no workaround.
• CSCef11214
Symptoms: An Engine 2 Quad OC-12 POS line card release may fail when it is processing traffic.
Conditions: This symptom is observed on a Cisco 12000 series that runs a Cisco IOS interim release
of Release 12.0(26)S3. This caveat is resolved in Release 12.0(26)S3.
Workaround: There is no workaround.
• CSCef12828
Symptoms: When traffic passes through a router, the router blocks traffic for certain prefixes behind
a port-channel link. Traffic that originates from the router itself (that is, process-switched traffic)
works fine.
Conditions: This symptom is observed on a Cisco 12410 that runs Cisco IOS Release 12.0(27)S1
and that is configured with two PRP-2 processors.
Workaround: There is no workaround.
• CSCef13024
Symptoms: An Engine 2 line card in a Cisco 12000 series router does not forward packets destined
to default route in hardware. Instead it is routed through the line card CPU.
Conditions: Cisco IOS Release 12.0(27)S2 is affected by this problem.
Workaround: There is no workaround. Traffic goes through the local CPU and so performance might
be an issue.
Further Problem Description: This problem is a side effect of the caveat CSCdz42137.