i saved my log from my tp-link, where it works.
my oberservation is, that my tp-link hardware-net-interfaces have all the same mac-adress. surprise.
i logged the discover, but i have now clue it this helps somehow..
9:19:38.574811 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has ip-178-201-179-194.hsi08.unitymediagroup.de tell ip-178-201-176-1.hsi08.unitymediagroup.de, length 46
19:19:38.591660 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from f8:d1:11:be:34:2e (oui Unknown), length 300, xid 0x60579735, Flags [none] (0x0000)
Client-Ethernet-Address f8:d1:11:be:34:2e (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
MSZ Option 57, length 2: 576
Parameter-Request Option 55, length 7:
Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
Domain-Name, BR, NTP
Vendor-Class Option 60, length 12: "udhcp 1.22.1"
19:19:38.593062 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has ip-95-222-130-51.hsi15.unitymediagroup.de tell ip-95-222-128-1.hsi15.unitymediagroup.de, length 46
19:19:38.630799 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.45.56.236 tell 10.45.56.1, length 46
19:19:38.738863 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 328)
ip-178-203-204-1.hsi10.unitymediagroup.de.bootps > ip-178-203-207-51.hsi10.unitymediagroup.de.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 300, hops 1, xid 0x60579735, Flags [none] (0x0000)
Your-IP ip-178-203-207-51.hsi10.unitymediagroup.de
Server-IP 81.210.129.74
Gateway-IP 10.207.4.1
Client-Ethernet-Address f8:d1:11:be:34:2e (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: 10.207.4.1
Lease-Time Option 51, length 4: 3470
Subnet-Mask Option 1, length 4: 255.255.252.0
Default-Gateway Option 3, length 4: ip-178-203-204-1.hsi10.unitymediagroup.de
Domain-Name-Server Option 6, length 8: de-bom01a-dns-res-01.bom.unity-media.net,de-dtm01a-dns-res-01.dtm.unity-media.net
BR Option 28, length 4: 255.255.255.255
Hostname Option 12, length 12: "185933738bb9"
19:19:38.739624 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from f8:d1:11:be:34:2e (oui Unknown), length 300, xid 0x60579735, Flags [none] (0x0000)
Client-Ethernet-Address f8:d1:11:be:34:2e (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Requested-IP Option 50, length 4: ip-178-203-207-51.hsi10.unitymediagroup.de
Server-ID Option 54, length 4: 10.207.4.1
MSZ Option 57, length 2: 576
Parameter-Request Option 55, length 7:
Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
Domain-Name, BR, NTP
Vendor-Class Option 60, length 12: "udhcp 1.22.1"
19:19:38.750139 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 328)
ip-178-203-204-1.hsi10.unitymediagroup.de.bootps > ip-178-203-207-51.hsi10.unitymediagroup.de.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 300, hops 1, xid 0x60579735, Flags [none] (0x0000)
Your-IP ip-178-203-207-51.hsi10.unitymediagroup.de
Server-IP 81.210.129.74
Gateway-IP 10.207.4.1
Client-Ethernet-Address f8:d1:11:be:34:2e (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 10.207.4.1
Lease-Time Option 51, length 4: 3470
Subnet-Mask Option 1, length 4: 255.255.252.0
Default-Gateway Option 3, length 4: ip-178-203-204-1.hsi10.unitymediagroup.de
Domain-Name-Server Option 6, length 8: de-bom01a-dns-res-01.bom.unity-media.net,de-dtm01a-dns-res-01.dtm.unity-media.net
BR Option 28, length 4: 255.255.255.255
Hostname Option 12, length 12: "185933738bb9"
19:19:38.796895 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.47.3.131 tell 10.47.0.1, length 46
19:19:39.109091 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has ip-88-153-148-7.hsi04.unitymediagroup.de t