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Cisco Bug: CSCuq07785 - IPv6 Hardening: Special CPE can't online if Solicit PD first

Last Modified

Jul 11, 2017

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases


Description (partial)

1. DHCPv6 Solicit received when there is no LLA, currently we will drop the Solicit message. 

2. CPE Issued DHCPv6 Solicit with IA_PD first, then Solicit with IA_NA. CMTS will lost PD address.

This is caused by some strange CPE behavior.
1. CPE start DHCPv6 without doing NS(DAD).
2. CPE try to get IA_PD, IA_NA with separate DHCPv6 messages. And it try to get IA_PD first.
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