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

Last Modified

Nov 10, 2020

Products (8)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco Catalyst 9500 Series Switches
  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 3650 Series Switches
  • Cisco Catalyst 9200 Series Switches
  • Cisco Catalyst 9600 Series Switches
  • Cisco Catalyst 9300 Series Switches
  • Cisco Catalyst 9400 Series Switches

Known Affected Releases

16.9.6 Gibraltar-16.11.1

Description (partial)

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

Catalyst 9500 acting as DHCPv6 Relay running 16.11.1 or any 16.12 (16.12.1 up to 16.12.3a) versions
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Bug Details Include

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