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Cisco Bug: CSCvi62746 - Client cannot pass IPv6 traffic for 15 seconds after associating

Last Modified

Jul 16, 2018

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

8.3(140.0)

Description (partial)

Symptom:
A wireless client sees a 15 second delay when it associates to a network before it can pass IPv6 traffic.

Conditions:
This will occur for clients that rely solely on Stateless Address Auto-Configuration (SLAAC) router advertisements (RAs) to get an IPv6 address.  That is, the clients do not send any DHCPv6 request packets.  On networks that disable the SLAAC M and O bits, many clients will not send DHCPv6 even if they would normally.
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Bug Details Include

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