Cisco ASR 903 Release Notes page 75

Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases
CSCty44345
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Symptoms: The router experiences packet drops when passing 64 byte packets.
Conditions: Occurs when the router is passing 64 byte packets at the line rate on the OC-3 interface
module.
Workaround: Configure a larger packet size on the interface.
CSCty45058
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Symptoms: Some CEM groups do not function correctly.
Conditions: Occurs when you configure more than 196 CEM groups on the T1/E1 or OC-3 interface
module.
Workaround: There is no workaround; avoid configuring more than 196 CEM groups.
CSCty45463
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Symptoms: The router stops passing VPLS unicast traffic.
Conditions: Occurs after you reload the router while it is passing VPLS unicast traffic.
Workaround: Perform one of the following actions:
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CSCty46058
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Symptoms: Shutting down a static multisegment VFI causes traffic to flow in one direction.
Conditions: This issue is observed when you configure a point-to-point VFI with two static
neighbors and then shut down the VFI by using the shutdown command.
Workaround: There is no workaround.
• CSCty48710
Symptoms: The router drops multicast packets on layer 3 interfaces.
Conditions: Occurs when you configure 63 bridge domains per port and the router sends IGMP
joins from all of the bridge domains to the same IGMP group.
Workaround: You can apply the following workarounds:
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CSCty49041
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Symptoms: The router drops VPLS traffic on one or more virtual circuits (VCs).
Conditions: Occurs when you reload a CPE or UPE device when there approximately 100 VCs
configured between the UPE and NPE devices.
Workaround: Issue the clear xconnect command on the affected VC.
CSCty49157
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Symptoms: Some members in an IMA group do not become active even though the interface
controllers are up.
Conditions: Occurs when you perform an OIR on a remote line card or when the standby RSP
becomes the active RSP.
Workaround: There is no workaround.
CSCty50377
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OL-26630-08
Clear the mac-address table on the affected virtual circuit (VC)
Stop VPLS traffic until the MAC address table is cleared, then resume VPLS traffic.
Applying a policy-map on each EVC can reduce the packet drops to some extent.
Increase the default port queue size.
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
Caveats in Cisco IOS XE 3.6S Releases
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