June 10, 20242 yr Hi all. After the great JorgeB solved my network configuration problem, I was left with the fact that the eth0, which is a gigabyte onboard NIC, only runs at 100mb/s. Changed cable, switch port, checked to see if there was a ethernet BIOS option (there is not ), used the "ethtool -s eth0 speed 1000 duplex full autoneg off" command, all stuff I found here searching the forum. I have this nic connected to my gigabyte switch -> router -> internet. And another NIC, 2,5gbe, connected directly to my MacBook through a 2.5gbe-thunderbolt adapter. I suspect the problem is with the nic controller... Ethernet controller: Intel Corporation Ethernet Controller I225-V (rev 03) Now, if I was to change the switch to a 2.5gbe enabled, I could just disable (or just disconnect) the gigabyte onboard nic, and use the 2.5 nic as my eth0, connect all devices to the switch, so the server connection to the internet would be ok as well as the MacBook connection to the server would be at 2.5gbe speed...is that correct? root@Calango:~# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Link partner advertised pause frame use: Symmetric Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 100Mb/s Duplex: Full Auto-negotiation: on Port: Twisted Pair PHYAD: 0 Transceiver: external MDI-X: Unknown Supports Wake-on: pumbg Wake-on: d Link detected: yes root@Calango:~# ethtool eth1 Settings for eth1: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full 2500baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full 2500baseT/Full Advertised pause frame use: Symmetric Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: 2500Mb/s Duplex: Full Auto-negotiation: on Port: Twisted Pair PHYAD: 0 Transceiver: internal MDI-X: off (auto) Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000007 (7) drv probe link Link detected: yes
June 11, 20242 yr Author 2 hours ago, JorgeB said: Does your switch support 2.5GbE? Not the current one, thinking abou buying one…
June 11, 20242 yr Community Expert Solution OK, so if you do that now it will only work at gigabit speeds.
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