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Cisco Bug: CSCvu25931 - DHCPv6 RELAY-REPLY dropped when punted on 9500

Last Modified

Sep 02, 2020

Products (1)

  • Cisco Catalyst 9500 Series Switches

Known Affected Releases

17.2

Description (partial)

Symptom:
- DHCPv6 RELAY-REPLY messages are dropped on devices which act as DHCPv6 relays when punted to CPU, if they ingress through an MPLS enabled interface and "no ipv6 dhcp-relay trust-all" is configured, even though the ingressing interface is marked as being trusted.

Conditions:
- RELAY-REPLY message ingresses the device through an MPLS enabled interface and "no ipv6 dhcp-relay trust-all" is configured, only specific interfaces are marked as relay trusted. 
- Device must be running 16.12.4 or 17.3.1
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Bug Details Include

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  • Status
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