Cisco OL-4015-08 Manual de usuario Pagina 19

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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)S7
This is the ninth clock cycle of SCL. SDA driven low during SCLs rising edge is detected as ACK.
But here, the SDA is driven low during falling edge of SCL. That means, SDAs falling edge
coincides with SCLs falling edge. This may sometimes be detected as a START condition by the
slave (the START condition is a LOW on SCL during falling edge of SDA). The SFP state machine
is disturbed with this, and it probably goes into START mode. So, the SFP does not drive any data
onto the bus, whereas the master reads FF on the bus because the default state of SDA is HIGH.
Conditions: An SFP OIR.
Workaround: There is no workaround.
CSCtb73450
Symptoms: Start-Control-Connection-Request (SCCRQ) packets may cause a tunnel to reset after
digest failure.
Conditions: This symptom occurs when the SCCRQ packets are sent with a wrong hash.
Workaround: There is no workaround.
CSCtc14824
Symptoms: Interface flapping in a link bundling may cause the linecards to crash.
Conditions: When an Engine 5 linecard and a Gigabit SPA are configured as part of a LB member
and when bidirectional multicast traffic is sent through the LB interface that goes down, the linecard
may crash.
Workaround: Perform one of the following two options:
Option 1: Where possible, consider building a port-channel from the same slot. For example, if your
present configuration has the following:
!
interface GigabitEthernet0/1/1
channel-group 1
!
interface GigabitEthernet1/0/0
channel-group 1
!
Then consider the following, if feasible:
!
interface GigabitEthernet0/1/1
channel-group 1
!
interface GigabitEthernet0/2/0 <=== (channel-gr 1 from Gi 1/0/0 to Gi 0/2/0)
channel-group 1
!
Option 2: This crash is seen when there is user intervention that leads to physical interaction with
the module/interface hardware, when traffic is actively flowing. Consider shutting the interfaces
down before touching the hardware/interfaces.
CSCtc45384
Symptoms: IPv6 packets stop matching Class in the service policy when a shut/no shut of the
interface is performed.
Conditions: This symptom is observed when a shut/no shut is performed on the interface.
Workaround: Remove and reapply the service policy.
CSCtc61836
Symptoms: MLPPP sequence numbers received by the remote end have missing sequences and/or
interrupted multicast traffic with the MLPPP interface as the outgoing link.
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