5
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-12
Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases
Limitations and Restrictions
Ethernet IM Restrictions
•
The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces.
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The Cisco ASR 903 Router does not support the mac-address command on Gigabit Ethernet
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.
•
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
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The Cisco ASR 903 Router supports ATM over MPLS N-to-one cell mode for a single ATM Virtual
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.
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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
You can configure similar functionality using multiple Ethernet Virtual Connections on an
interface. For more information, see
Configuring Ethernet Virtual Connections on the Cisco
ASR 903 Router.
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.