The original post: /r/techsupport by /u/THRILLMONGERxoxo on 2025-02-19 00:55:41.

I have my M1 Mac connected to an iVanky FusionDock Max 1 via Thunderbolt. It has a 2.5G port built in the back. In that port I have an ethernet cable plugged into my router which is a TP-Link Archer AXE300.

The iVanky also has multiple Thunderbolt 4 ports. I have one of those ports populated with a OWC 10G Thunderbolt Ethernet adapter. The adapter is plugged into my 10G TP Link TL-SX105 switch.

The switch also has both of my Sonology DS1819+ plugged in Via their installed 10G Ethernet Cards.

The AXE300 LAN is set to 10.10.10.1 and the Subnet is 255.255.255.0

The AXE300 Internet subnet is set to 255.255.254.0

On my Mac:

The 2.5G Port on the iVanky (Device en10) is set to IP: 10.10.10.101 Subnet 255.255.255.0Router: 10.10.10.1

The 10G Ethernet Adapter (Device en9) is set to IP: 10.10.10.10 with the subnet 255.255.255.0 and the Router: 10.10.10.1

I also have a WiFi connection (en0)

On the Synologys I have the IPs set to 10.10.10.5 and 10.10.10.6 Subnet set to 255.255.255.0

What’s making my Mac route all the traffic through the 2.5 port and completely ignoring my 10G Ethernet unless the 2.5G port is unplugged and the wifi is turned off?

When I set the 10G Ethernet Thunderbolt Adapter as the first in the networking order why does my mac shut down the entire internet?

Can I have it so that I can browse over the 2.5G and have my Synology connect with my Macbook at 10G? Why isn’t my Mac able to figure this out? I think all other parts of this connection are working just fine.

Here is my Netstat:

Last login: Tue Feb 18 16:22:27 on console

Restored session: Tue Feb 18 16:21:23 PST 2025

(base) user@MacBook-Pro ~ % netstat -nr

Routing tables

Internet:

Destination        Gateway            Flags               Netif Expire

default            10.10.10.1UGScg                en10

default            10.10.10.1UGScIg                en9

default            link#26            UCSIg               utun5

8.8.4.4link#26            UHWIig              utun5

8.8.8.8link#26            UHWIig              utun5

10.10.10/24        link#14            UCS                  en10      !

10.10.10/24        link#20            UCSI                  en9      !

10.10.10.1/32link#14            UCS                  en10      !

10.10.10.168:7f:f0:2:50:e    UHLWIir              en10   1195

10.10.10.168:7f:f0:2:50:e    UHLWIir               en9   1196

10.10.10.1/32link#20            UCSI                  en9      !

10.10.10.590:9:d0:15:ce:2c   UHLWIi               en10   1153

10.10.10.690:9:d0:78:2d:d7   UHLWI                en10   1153

10.10.10.7f0:4:e1:82:c0:f    UHLWI                en10   1144

10.10.10.10/32link#20            UCS                   en9      !

10.10.10.15dc:a2:66:58:8a:17  UHLWI                en10   1148

10.10.10.101/32link#14            UCS                  en10      !

10.10.10.255ff:ff:ff:ff:ff:ff  UHLWbI               en10      !

100.64/10          link#26            UCS                 utun5

100.97.162.107100.97.162.107UH                  utun5

100.100.100.100/32 link#26            UCS                 utun5

100.100.100.100link#26            UHWIi               utun5

127                127.0.0.1UCS                   lo0

127.0.0.1127.0.0.1UH                    lo0

169.254            link#14            UCS                  en10      !

169.254            link#20            UCSI                  en9      !

224.0.0/4          link#14            UmCS                 en10      !

224.0.0/4          link#20            UmCSI                 en9      !

224.0.0/4          link#26            UmCSI               utun5

224.0.0.2511:0:5e:0:0:fb      UHmLWI               en10

239.255.255.2501:0:5e:7f:ff:fa    UHmLWI               en10

255.255.255.255/32 link#14            UCS                  en10      !

255.255.255.255/32 link#20            UCSI                  en9      !

255.255.255.255/32 link#26            UCSI                utun5