* [dpdk-dev] vhost-switch TX corrupted packet with Fedora 21 VM
@ 2015-04-16 2:55 Choi, Sy Jong
0 siblings, 0 replies; only message in thread
From: Choi, Sy Jong @ 2015-04-16 2:55 UTC (permalink / raw)
To: dev
Hi
Sending packets out from virtio to dpdk vhost to phy will cause packets corruption
I have tested this using
- DPDK 2.0.0 using vhost-cuse,
- qemu 1.6.1.
- DPDK vhost-switch sample app.
Fedara 21 (kernel 3.19), packets corrupted.
Debian Wheezy (kernel 3.2), packets are ok.
Sometime the packets was not even sent out, and I keep getting this message.
VHOST_DATA: (0) WARNING: This device is using an existing MAC address and has not been registered
VHOST_DATA: (0) WARNING: This device is using an existing MAC address and has not been registered
I think DPDK vhost-switch filter non register MAC address.
Occasionally, packets were being forwarded by vhost-switch.
Setup is very simple, just configure IP address (1.1.1.1/24) on the VM eth0, and ping an IP address (1.1.1.2) on the same subnet with Arp table entry added. __
+---------------------------------------------------+ |
| guest | |
| +-------------------------------------------+ | |
| | Ping ICMP | | |
| +-------------------------------------------+ | |
| : | |
| | | | guest
| v | |
| +-------------------------------------------+ | |
| | Kernel Virtio | | |
+---+---------------+-----------+---------------+---+ __|
:
|
v __
+---+---------------+----------+--------------=+---+ |
| | vhost net0 | | |
| +---------------+ | |
| : | |
| | | | host
| V | |
| +--------------+ | |
| | phy port | vhost-switch | |
+---+--------------+-------------------------------+ __|
:
|
V
+--------------------------------------------------+
| |
| traffic generator |
| |
+--------------------------------------------------+
ICMP packet has become:-
0010: 00000000100000001050b95a81000000 0088ffff1050b95a0088ffff2050b95a
0020: 0088ffff2050b95a0088ffff3050b95a 0088ffff3050b95a0088ffff4050b95a
0030: 0088ffff4050b95a0088ffff5050b95a 0088ffff5050b95a0088ffff6050b95a
0040: 0088ffff6050b95a
Regards,
Choi, Sy Jong
Platform Application Engineer
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