Cisco ASR 903 Release Notes page 55
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Also See for ASR 903:
- Installation manual (200 pages) ,
- Hardware installation manual (196 pages) ,
- Manual (147 pages)
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Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases
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If you increase the maximum transmission unit (MTU) size on an MLPPP interface to a value higher
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than the maximum received reconstructed unit (MRRU) value on the peer interface, this can bring
the MLPPP tunnel down. To restore the tunnel, perform a shutdown/no shutdown on the interface.
MPLS VPN Limitation
MPLS VPN (L3VPN) Fragmentation does not function properly if an access interface has a higher
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MTU value than a core interface. To ensure that fragmentation functions correctly, configure the
core interface MTU with a value that exceeds the access interface MTU and relevant headers.
OC-3 IM Limitations
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SDH framing mode is supported; SONET is not supported.
Channelization is not supported.
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The optical interface module is designed for OC-3 and OC-12 traffic, but OC-12 functionality is not
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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.
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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.
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QoS Limitations
For a description of QoS features and limitations on the Cisco ASR 903 Router in release 3.6S, see
http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR903-Ch
assis-SW-36.html.
Software Upgrade Limitation
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We recommend you set the interface-module-delay value to 150 or greater in order to ensure
sufficient time for IM software upgrades.
Subinterfaces Limitation
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The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces.
Note
T1/E1 IM Limitations
Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert
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data interface command is not supported.
OL-26630-08
Packet counters on the bundle display the number of fragments rather than packets.
Control packets are accounted on the bundle.
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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- Quick Links:
- Cisco Asr 903 Router Overview
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