You can use show commands to display information about DHCP relay statistics, relay addresses for a device, and relay addresses for an interface.
device# show ipv6 dhcp relay address DHCPv6 unique identifier(DUID): 0102f8f10027f8d43dfb Interface Relay Address VRF Name Outgoing Interface --------- ------------- -------- ------------------ eth 1/17 2002::10 default-vrf eth 1/17 2000::10 default-vrf eth 0/9 eth 1/17 2019::10 test ve 102 ve 94 2011::10 default-vrf
device# show ipv6 dhcp relay address interface ethernet 1/40 DHCPv6 unique identifier(DUID): 01021025768ef804e005 Interface Relay Address VRF Name Outgoing Interface --------- ------------- -------- ------------------ Eth 1/40 2019::10 default-vrf
device# show ipv6 dhcp relay statistics DHCPv6 Relay Statistics ------------------------ Packets dropped : 0 Error : 0 Packets received : 60 SOLICIT : 6 REQUEST : 6 CONFIRM : 0 RENEW : 2 REBIND : 0 RELEASE : 6 DECLINE : 0 INFORMATION-REQUEST : 0 RELAY-FORWARD : 0 RELAY-REPLY : 40 Packets sent : 60 RELAY-FORWARD : 20 REPLY : 40