Hi,
Test 1:
We are trying to create a software bridge as mentioned below on SR-IOV enabled 40 gig PF NIC. Then We tried to create VM on the two vnet interface. The issue is whenever VM is sending some broadcast packet, it receiving it back by itself.
[root@hyp-1 ~]# brctl show brosf
bridge name bridge id STP enabled interfaces
brosf 8000.6805ca2d50c0 no ens3f0
vnet4
vnet7
# brctl showmacs brosf
port no mac addr is local? ageing timer
1 68:05:ca:2d:50:c0 yes 0.00
1 fa:ac:a4:00:f8:03 no 0.10
1 fa:ac:a4:00:f9:03 no 0.09
1 fa:ac:a4:01:f1:03 no 0.04
1 fa:ac:a4:02:73:03 no 0.03
2 fe:ac:a4:00:f8:03 yes 0.00
3 fe:ac:a4:00:f9:03 yes 0.00
where
Port 1 is ens3f0 (PF)
port 2 is vnet4
port 3 is vnet7
# ip link show ens3f0
7: ens3f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc mq master brosf state UP mode DEFAULT qlen 1000
link/ether 68:05:ca:2d:50:c0 brd ff:ff:ff:ff:ff:ff
vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto
vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state auto
Test 2:
We tried same thing by disabling the num of vf on the same 40 gig NIC. It is working fine. The details are as below:
[root@hyp-3 0000:04:00.0]# brctl show brosf
bridge name bridge id STP enabled interfaces
brosf 8000.6805ca2e7f00 no ens3
vnet2
vnet5
[root@hyp-3 0000:04:00.0]# brctl showmacs brosf
port no mac addr is local? ageing timer
1 68:05:ca:2e:7f:00 yes 0.00
1 fa:ac:a4:00:f8:03 no 0.11
1 fa:ac:a4:00:f9:03 no 0.00
2 fa:ac:a4:01:f1:03 no 0.07
3 fa:ac:a4:02:73:03 no 0.04
2 fe:ac:a4:01:f1:03 yes 0.00
3 fe:ac:a4:02:73:03 yes 0.00
[root@hyp-3 0000:04:00.0]# ip link show ens3
31: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master brosf state UP mode DEFAULT qlen 1000
link/ether 68:05:ca:2e:7f:00 brd ff:ff:ff:ff:ff:ff
Details:
Host Os
Centos 7
PF:
04:00.0 Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 01)
# modinfo i40e
filename: /lib/modules/3.10.0-123.9.3.el7.x86_64/kernel/drivers/net/ethernet/intel/i40e/i40e.ko
version: 1.0.15
license: GPL
description: Intel(R) Ethernet Connection XL710 Network Driver
vermagic: 3.10.0-123.9.3.el7.x86_64 SMP mod_unload modversions
Observation
In both scenario, there is difference in population mac address.
Query
I gone through some article, they mentioned if SR IOV is enabled, Physical Function (PF) does not work in bridge mode. May i know the reason for this?
May i know the reason, why with vf is enabled, the broadcast packets are received by VM itself.