Specifications

1318
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S3
Conditions: This symptom is observed when a GRE tunnel between two routers is up and you ping
from the GRE interface of one router to the GRE interface of the other router.
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 Cisco IOS 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 Cisco IOS 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.
• CSCef14150
Symptoms: The show policy-map interface command and its corresponding MIB,
CISCO-CBQOS-MIB, report no or fewer Random Drops than what the router actually drops.
Conditions: The problem occurs only on interfaces at or faster than 500 Mbps.
Workaround: There is no workaround.