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Cisco Bug: CSCvs22896 - DHCPv6 RELAY-REPLY packet is being dropped

Last Modified

Dec 18, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

Gibraltar-16.11.1

Description (partial)

Symptom:
End clients connected to DHCPv6 Relay sends DHCPv6 INFORMATION-REQUEST packet for getting additional network information such as DNS-Server-Addresses. Catalyst 9500 acting as DHCP-Relay is sending DHCPV6 RELAY-FORWARD message to DHCPv6-Server.DHCPv6-Server is answering correctly with an DHCPv6 RELAY-REPLY which arrives at cat 9500, however it is not forwarded to the end client

Conditions:
Catalyst 9500 acting as DHCPv6 Relay running 16.11.1
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