Instable network connection after network bridge setup

TrueNAS General
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1

I setup a network bridge on my truenas server, to be able to connect my VMs with my Truenas host. I used this tutorial: https://www.youtube.com/watch?v=uPkoeWUfiHU

However, after the setup I experience regular connection timeouts on the truenas host and the VM (win11 via remote desktop)

I tried AI for debugging, but I didn’t find a prober solution.

Info:

root@truenas-192[~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.4.100  netmask 255.255.255.0  broadcast 192.168.4.255
        inet6 fe80::b884:10ff:fe34:dc9  prefixlen 64  scopeid 0x20<link>
        ether 3e:b0:f0:19:2b:92  txqueuelen 1000  (Ethernet)
        RX packets 803200  bytes 27266238514 (25.3 GiB)
        RX errors 0  dropped 5880  overruns 0  frame 0
        TX packets 648783  bytes 266142751 (253.8 MiB)
        TX errors 0  dropped 197 overruns 0  carrier 0  collisions 0

enp1s0f1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether d0:50:99:d9:49:96  txqueuelen 1000  (Ethernet)
        RX packets 41093132  bytes 60242131908 (56.1 GiB)
        RX errors 0  dropped 12770  overruns 0  frame 0
        TX packets 29520074  bytes 21219678011 (19.7 GiB)
        TX errors 0  dropped 15 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 481831  bytes 620259277 (591.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 481831  bytes 620259277 (591.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
		
root@truenas-192[~]# ifconfig br0
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.4.100  netmask 255.255.255.0  broadcast 192.168.4.255
        inet6 fe80::b884:10ff:fe34:dc9  prefixlen 64  scopeid 0x20<link>
        ether 3e:b0:f0:19:2b:92  txqueuelen 1000  (Ethernet)
        RX packets 803901  bytes 27266277128 (25.3 GiB)
        RX errors 0  dropped 5984  overruns 0  frame 0
        TX packets 649527  bytes 266290332 (253.9 MiB)
        TX errors 0  dropped 197 overruns 0  carrier 0  collisions 0
		
root@truenas-192[~]# ifconfig enp1s0f1
enp1s0f1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether d0:50:99:d9:49:96  txqueuelen 1000  (Ethernet)
        RX packets 41094773  bytes 60242272413 (56.1 GiB)
        RX errors 0  dropped 12774  overruns 0  frame 0
        TX packets 29521685  bytes 21219986452 (19.7 GiB)
        TX errors 0  dropped 15 overruns 0  carrier 0  collisions 0

Edit:
OS: TrueNAS Scale-25.04.2.4
HW Info
CPU: AMD Ryzen 9 3900X
RAM: 128GB ECC RAM (2x M391A4G43MB1-CTD, 2x M391A4G43AB1-CVF)
MB: X470D4U2-2T
onboard NIC: X550-AT2
HBA: Adaptec ASR-78165
HBA Expander: 2x Intel RES2SV240

2

@Stux A use tried following your video.

TrueNAS Scale: Setting up a Static IP and Network Bridge // Access NAS host from VM

3

I’m guessing you ran the commands pretty much back to back, which means that is a fairly high amount of dropped packets that is actively increasing… Any chance you tried physically reseating the cable or swapping it out?

How is whatever you’re using connecting to the nas? Are you experiencing any network issues on client device?

What NIC is this?

1 Like
4

no, the cable hasn’t been touched

it is connected to a MikroTik CRS305-1G-4S. No problems so far within the existing network.

no

X550-AT2

5

i think i found the problem: it was a lose rj45 connection. Never had this problem with sfp+.

1 Like
6

Had a feeling it may have just been a loose connection!