[ovs-discuss] Debugging Packet Loss in Bridge
Klaus Darilion
klaus.mailinglists at pernau.at
Wed Jun 13 08:54:05 UTC 2018
Hi!
I have the following problem. Server: Debian 9 with Proxmox 5.2.
Kernel: pve-kernel-4.15.17
OVS: 2.7.0-2
VM
tap100
|
|
ovs-bridge
|
|
4x1G SUN NIC (niu.ko)
| |
server server
A B
Packets from VM->server traverse the bridge fine. Packets from
servers->VM traverse the bridge only if they are approx < 1000 Bytes
(ping payload). For bigger packets I see them with tcpdump on the
physical interface, but not on the tap interface.
After some googling I found this issue:
https://github.com/torvalds/linux/commit/14224923c3600bae2ac4dcae3bf0c3d4dc2812be
The proxmox guys provided me with a new kernel where they backported
this patch.
Now, frankle, large packets from server-> VM work on one port of the
NIC, but not on the other port.
Now I am stuck, if my issue actually is related to the referenced
bugfix, or something else.
How can I debug why a packet does not traverse the bridge?
Thanks
Klaus
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