Cisco ASR 903 Release Notes

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Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-08
Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases
Limitations and Restrictions
• 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.
Limitations and Restrictions in Cisco IOS XE Release 3.6S
The following limitations apply to the Cisco ASR 903 Router in IOS XE Release 3.6S:
Note For a summary of limitations in Release 3.5S, see the IOS XE 3.5 Release Notes.
EFP Limitation
• QinQ is not supported on trunk EFP interfaces.
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.
MLPPP Limitations
The following limitations apply when using MLPPP in IOS XE Release 3.6 on the
CiscoASR903Router:
• All links in an MLPPP bundle must be on the same interface module.
• All links in an MLPPP bundle must be of the same bandwidth.
• The Cisco ASR 903 Router supports a maximum of 8 links per bundle
• To change the MLPPP bundle fragmentation mode between enabled and disabled, perform a
shutdown/no shutdown on the bundle.
• LFI is not supported
• Multiclass MLP is not supported
• The Cisco ASR 903 Router supports MLPPP statistics with the following limitations:
– Packet counters on the bundle display the number of fragments rather than packets.
– Control packets are accounted on the bundle.
• If you increase the maximum transmission unit (MTU) size on an MLPPP interface to a value higher
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.
ATM IMA Limitation
• You can create a maximum of 16 IMA groups on each T1/E1 interface module.
Clocking and Timing Limitation
• Only a single clocking input source can be configured within each group of eight ports (0-7 and
8-15) on the T1/E1 interface module using the network-clock input-source command.
Ethernet IM Restrictions
• The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces.

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English