Caveats In Cisco Ios Xe 3.7S Releases - Cisco ASR 903 Release Notes

Caveats in Cisco IOS XE 3.7S Releases

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Pseudowire/AToM Limitation
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QoS Limitations
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Software Upgrade Limitation
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Subinterfaces Limitation
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Note
T1/E1 IM Limitations
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Caveats in Cisco IOS XE 3.7S Releases
Caveats describe unexpected behavior. Severity 1 caveats are the most serious caveats. Severity 2 caveats
are less serious. Severity 3 caveats are moderate caveats and only select severity 3 caveats are included
in this chapter.
This section describes caveats in Cisco IOS XE 3.7S releases.
In this section, the following information is provided for each caveat:
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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
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If you issue the no card type command on the controller, you must reload the router in order to
configure a new card type value.
We recommend that you use Release 3.7.2 or later when using the OC-3 IM with high availability
(HA) features such as stateful switchover (SSO).
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.
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.
For a description of QoS features and limitations on the Cisco ASR 903 Router in release 3.7S, see
http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903-
Chassis-SW-37.html.
We recommend you set the interface-module-delay value to 150 or greater in order to ensure
sufficient time for IM software upgrades.
The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces.
You can configure similar functionality using multiple Ethernet Virtual Connections on an
interface. For more information, see
ASR 903 Router.
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.
Symptom—A description of what is observed when the caveat occurs.
Conditions—The conditions under which the caveat has been known to occur.
Configuring Ethernet Virtual Connections on the Cisco
Chapter
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