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When running 16.6.4, IPDT entry has incorrect attribute ARP, even if IP was assigned to the device through DHCP: 9300-TEST#show ip dhcp snooping binding MacAddress IpAddress Lease(sec) Type VLAN Interface ------------------ --------------- ---------- ------------- ---- -------------------- 00:87:31:E0:BA:D0 172.20.80.22 86343 dhcp-snooping 80 GigabitEthernet2/0/2 Total number of bindings: 1 9300-TEST# 9300-TEST#show device-tracking database Binding Table has 2 entries, 1 dynamic (limit 100000) Codes: L - Local, S - Static, ND - Neighbor Discovery, ARP - Address Resolution Protocol, DH4 - IPv4 DHCP, DH6 - IPv6 DHCP, PKT - Other Packet, API - API created Preflevel flags (prlvl): 0001:MAC and LLA match 0002:Orig trunk 0004:Orig access 0008:Orig trusted trunk 0010:Orig trusted access 0020:DHCP assigned 0040:Cga authenticated 0080:Cert authenticated 0100:Statically assigned Network Layer Address Link Layer Address Interface vlan prlvl age state Time left ARP 172.20.80.22 0087.31e0.bad0 Gi2/0/2 80 0005 73s REACHABLE 229 s(90309 s) L 172.20.80.3 50f7.22d5.e6ca Vl80 80 0100 120s REACHABLE 9300-TEST# Issue is observed on 9300 and 3850 running 16.6.4.
IPDT is configured on the device running 16.6.4 and policy is assigned to the interface: device-tracking policy TRUNK trusted-port device-role switch no protocol udp interface GigabitEthernet2/0/1 description UPLINK switchport trunk allowed vlan 80 switchport mode trunk device-tracking attach-policy TRUNK ip dhcp snooping trust DHCP snooping is configured on the device and IP is assigned to the end host through DHCP.
no
Issue is not observed when switch is running 16.6.3, attribute is DH4: 9300-TEST#show ip dhcp snooping binding MacAddress IpAddress Lease(sec) Type VLAN Interface ------------------ --------------- ---------- ------------- ---- -------------------- 00:87:31:E0:BA:D0 172.20.80.21 86397 dhcp-snooping 80 GigabitEthernet2/0/2 Total number of bindings: 1 9300-TEST# 9300-TEST#show device-tracking database Binding Table has 2 entries, 1 dynamic (limit 100000) Codes: L - Local, S - Static, ND - Neighbor Discovery, ARP - Address Resolution Protocol, DH4 - IPv4 DHCP, DH6 - IPv6 DHCP, PKT - Other Packet, API - API created Preflevel flags (prlvl): 0001:MAC and LLA match 0002:Orig trunk 0004:Orig access 0008:Orig trusted trunk 0010:Orig trusted access 0020:DHCP assigned 0040:Cga authenticated 0080:Cert authenticated 0100:Statically assigned Network Layer Address Link Layer Address Interface vlan prlvl age state Time left DH4 172.20.80.21 0087.31e0.bad0 Gi2/0/2 80 0031 22s REACHABLE 279 s(86512 s) L 172.20.80.3 50f7.22d5.e6ca Vl80 80 0100 239mn REACHABLE 9300-TEST#
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