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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-12
Chapter
Caveats in Cisco IOS XE 3.7S Releases
Symptom: Interface module (IM) IM FPGA upgrade fails.
Conditions: Occurs on some IMs when you install an IOS image with bundled FPGA software.
Workaround: Manually upgrade the FPGA.
• CSCuc98590
Symptom: The router can crash when you remove a boundary clock (BC) configuration.
Conditions: Occurs very rarely when you remove a BC configuration.
Workaround: There is no workaround. However, the issue occurs very rarely.
• CSCud12587
Symptom: When handling IS-IS packets, the router punts the traffic to the Route Switch Processor
(RSP) and applies policing to limit the traffic to 1 Mbps.
Conditions: Occurs when you enable IS-IS over an Ethernet over MPLS (EoMPLS) connection.
Workaround: Use IS-IS over another connection type or limit the IS-IS traffic to less than 1 Mbps.
• CSCud13535
Symptom: The router drops imposition traffic sent to a neighbor device over a VPLS pseudowire.
Conditions: Occurs when the neighbor device configuration includes the no split horizon group
command.
Workaround: Remove the no split horizon group command from the VPLS neighbor device.
• CSCud28787
Symptom: The 10 gigabit Ethernet interface module (IM) flaps.
Conditions: Occurs when the IM passes high traffic volumes for an extended period of time.
Workaround: There is no workaround.
• CSCud43580
Symptom: The router does not apply the bandwidth remaining percent command within a QoS
policy in some instances.
Conditions: The issue can occur occasionally when:
–
There is a large discrepancy in bandwidth remaining values between QoS classes
– The classes containing the bandwidth remaining statements are oversubscribed at a low rate
or have a low queue-limit.
Workaround: Apply the following workaround:
– Increase the queue-limit value to 120 kilobytes or above.
–
If the QoS configuration uses WRED, increase the minimum threshold value.
– Alter the bandwidth remaining values to reduce the ratio between values.
Open Caveats—Cisco IOS XE Release 3.7(1)aS
This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in
Cisco IOS XE Release 3.7(1)aS.
• CSCts95896
Symptoms: The router stops passing traffic on EVC interfaces.