Cisco ASR 900 Series Release Notes page 63

Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases
Ethernet IM Restrictions
The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces.
•
The Cisco ASR 903 Router does not support the mac-address command on Gigabit Ethernet
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interface modules.
• On the Cisco ASR 903 Router, 10 Gigabit Ethernet interface modules are not supported in slots 4
and 5.
• When you install a Gigabit Ethernet IM in the topmost interface module slot (slot 5), the last
interface (interface GigabitEthernet0/5/0) is not operational; the port is reserved for internal
communication.
OC-3 IM Restrictions
The configure replace command is not supported on the OC-3 IMs.
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SDH framing mode is supported; SONET is not supported.
•
• HDLC encapsulation is supported; other encapsulation types are not supported.
• Channelization is not supported.
• The optical interface module is designed for OC-3 and OC-12 traffic, but OC-12 functionality is not
currently supported.
Pseudowire/AToM Limitation
The Cisco ASR 903 Router supports ATM over MPLS N-to-one cell mode for a single ATM Virtual
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Channel Connections (VCCs) or Permanent Virtual Circuits (PVCs) to a pseudowire, but does not
support mapping to multiple VCCs or PVCs.
The Cisco ASR 903 Router does not support ATM over MPLS one-to-one cell mode.
•
• The Cisco ASR 903 Router supports pseudowire ping using the CW method; pseudowire ping using
the TTL method is not supported.
The Cisco ASR 903 Router supports a maximum of 2000 pseudowires in any combination.
•
Subinterfaces Limitation
• The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces.
Note
T1/E1 IM Limitations
IP addresses are not supported—The current software release does not support specifying an IP
•
address on a T1/E1 interface. You can specify an address on the interface by configuring it as a part
of a CEM group using the cem-group command or as a part of an ATM IMA ima-group command.
For more details, see the Cisco ASR 903 Series Aggregation Services Router Chassis Software
Configuration Guide.
• Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert
data interface command is not supported.
• Bit error rate test (BERT) patterns have limited support—Currently, only the 2^11, 2^15,
2^20-O153, and 2^20-QRSS patterns are supported for BERT.
OL-26630-12
You can configure similar functionality using multiple Ethernet Virtual Connections on an
interface. For more information, see
ASR 903 Router.
Configuring Ethernet Virtual Connections on the Cisco
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
Limitations and Restrictions
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