SOLVED Issue with VLAN not send arp out interface

ropeguru

Dabbler
Joined
Jan 25, 2022
Messages
29
So I have a TrueNAS Scale, latest version, up and running with the following network setup.

10Gb interface on an access port with br0 configured and an ip in the 192.168.1.0/24 subnet

10Gb interface on a trunk port with only vlan 20 assigned, and an IP in the 172.18.10.0/24 range

Issue I am having is that I cannot ping the vlan 20 IP from my firewall unless I manually add an arp entry. Doing a tcpdump on interface vlan20, I can see the arp request come from the firewall and the arp reply go back out, but it never reaches the firewall. Like wise, if I ping from the TrueNAS server, I see the arp request go out, but the firewall never receives it.

Is this an issue by having the dual 10Gb interface setup?

Here is what the tcpdump on vlan20 looks like. There is only the TrueNAS and firewall on this vlan

root@truenas[~]# tcpdump -i vlan20
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on vlan20, link-type EN10MB (Ethernet), snapshot length 262144 bytes
11:08:23.094206 ARP, Request who-has 172.18.10.2 (Broadcast) tell 172.18.10.1, length 46
11:08:23.094224 ARP, Reply 172.18.10.2 is-at 0c:c4:7a:bb:69:f5 (oui Unknown), length 28
11:08:24.525104 ARP, Request who-has 172.18.10.2 (Broadcast) tell 172.18.10.1, length 46
11:08:24.525122 ARP, Reply 172.18.10.2 is-at 0c:c4:7a:bb:69:f5 (oui Unknown), length 28
 
Last edited:

ropeguru

Dabbler
Joined
Jan 25, 2022
Messages
29
Ok, I figured out a way to setup a quick container and attach to this vlan. Looks like the issue is on the firewall side as from this container, I can ping the TrueNAS server but cannot ping the firewall..

So from a TrueNAS perspective, this is solved..
 
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