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Cisco Bug: CSCvs09799 - When sub interfaces(with SAME Higher bits) are configured with IPv6, only 1 is active.

Last Modified

Jul 17, 2020

Products (2)

  • Cisco vEdge Router
  • Cisco vEdge Router Model

Known Affected Releases


Description (partial)

When sub-interfaces are configured with IPv6 addresses having the same subnet mask but with different network addresses, only one of those addresses gets correctly configured.

Example: 2001:10::1/119 and 2001:10::201/119
Here, both the IPv6 addresses have a subnet mask of 119. Meaning, the last 9 bits reserved for hosts. But their initial 119 bits of prefix differs.

Multiple sub-interfaces configured with the same subnet mask.
2001:10::1/119 and 2001:10::201/119
2001:10::1/118 and 2001:10::401/118
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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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