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Cisco Bug: CSCul67223 - IPv6 Router Adverts sent with wrong prefix len on Bundle interfaces

Last Modified

May 10, 2018

Products (6)

  • Cisco Carrier Routing System
  • Cisco IOS XR Software
  • Cisco ASR 9922 Router
  • Cisco ASR 9010 Router
  • Cisco ASR 9006 Router
  • Cisco ASR 9001 Router

Known Affected Releases


Description (partial)


IPv6 Stateless Address Autoconfiguration (SLAAC) fails for hosts connected 
to the router via Bundle-Ether interfaces and Bundle-Ether sub-interfaces.


The prefixes in IPv6 Router Advertisements sent on Bundle-Ether interfaces and 
Bundle-Ether sub-interfaces are advertised with a prefix length of 128 bits 
regardless of the prefix length that is configured. This prevents hosts
connected via these interface types from automatically configuring an
IPv6 address using SLAAC.

This issue is specific to Bundle-Ether interfaces and Bundle-Ether sub-interfaces.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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