1 gig trunk works, 10 gig trunk does not

[bruceg]

I have the following setup:

vyos router with 10-gig port
cisco 2960 - 24 gig - 2 10-gig
proxmox server - 4 gig - 2 10-gig

I created a trunk on the proxmox server on one of the gig-e interfaces and traffic happily passes from the internet through the vyos router, through the switch, to proxmox and to the vm.

I then created a trunk on the proxmox server on one of the 10-gig ports and connected it to the other 10-gig ports on the cisco switch, but it doesn't work.

I have the gig port and the 10 gig port on the cisco configured identically - same with the proxmox server.

Seems like it should just work but it doesn't. Any ideas where to look?

The configs:

proxmox:

auto lo
iface lo inet loopback

iface enp3s0f0 inet manual

allow-vmbr10 enp3s0f1
iface enp3s0f1 inet manual
ovs_type OVSPort
ovs_bridge vmbr10

iface enp4s0f0 inet manual

iface enp4s0f1 inet manual

allow-vmbr20 ens2f1
iface ens2f1 inet manual
ovs_type OVSPort
ovs_bridge vmbr20

iface ens2f0 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.88.240
netmask 255.255.255.0
gateway 192.168.88.1
bridge_ports enp3s0f0
bridge_stp off
bridge_fd 0

auto vmbr10
iface vmbr10 inet manual
ovs_type OVSBridge
ovs_ports enp3s0f1

auto vmbr12
iface vmbr12 inet static
address 100.64.205.11
netmask 255.255.255.0
bridge_ports enp4s0f0
bridge_stp off
bridge_fd 0

auto vmbr20
iface vmbr20 inet manual
ovs_type OVSBridge
ovs_ports ens2f1

cisco

interface GigabitEthernet1/0/3
description to prox-dal-1 enp4s0f0
switchport mode trunk
.
.
snip
.
.
interface TenGigabitEthernet1/0/1
description to vr-dal-1 eth1
switchport mode trunk
!
interface TenGigabitEthernet1/0/2
description to prox-dal-1 ens2f1
switchport mode trunk
!

 

[Richard]

Seems like it should just work but it doesn't. Any ideas where to look?

Follow the packets via tcpdump (or Wireshark) in order to figure out where they get lost.