Cisco ASR 903 Release Notes page 189
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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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The SFP-GE-T module supports only 100 Mbps and 1000 Mbps speeds.
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Load balancing using an odd number of port-channel member links is not supported.
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IP Multicast Limitation
Bandwidth-Based Call Admission Control (CAC) feature is not supported.
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IPv6 Limitations
The following limitation applies when using IPv6 on the Cisco ASR 903 Router:
IPv6 Neighbor Discovery (ND) cache timer expiry is 4 hours. To prevent the neighbour adjacency
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from being deleted after the timer expires:
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IS-IS Limitations
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IS-IS over IPv6 is not supported on VRF instances.
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Only one IS-IS process is permitted when you configure IS-IS with the address-family ipv6 and
bfd-all-interfaces commands.
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The IS-IS total and per-stream convergence time increases as the number of prefixes increases.
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The Cisco ASR 903 Router supports up to 3000 IS-IS nodes.
MLPPP Limitations
The following limitations apply when using MLPPP on the Cisco ASR 903 Router:
All links in an MLPPP bundle must be on the same interface module.
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All links in an MLPPP bundle must be of the same bandwidth.
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The Cisco ASR 903 Router supports a maximum of 16 links per bundle
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To change the MLPPP bundle fragmentation mode between enabled and disabled, perform a
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shutdown/no shutdown on the bundle.
LFI is not supported
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Multiclass MLP is not supported
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The Cisco ASR 903 Router supports MLPPP statistics with the following limitations:
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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.
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
MPLS-TP is not supported over POS interfaces.
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OL-26630-08
configure hardware based BFD sessions with the neighbours, or
configure static IPv6 neighbours, or
configure the ipv6 nd cache expire timer refresh command.
Packet counters on the bundle display the number of fragments rather than packets.
Control packets are accounted on the bundle.
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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