Dell Mellanox Family of Adapters User Manual
Page 47
User Manual for Mellanox ConnectX®-3 10/40 Gigabit Ethernet Adapters for Dell PowerEdge Servers
Rev 1.1
Mellanox Technologies
47
Example:
Step 3.
Read the administrative status of the GUID index.
To read the administrative status of GUID index
m
on port
n
:
Step 4.
Check the operational state of a GUID.
The values indicate what gids are actually configured on the firmware/hardware, and all the
entries are R/O.
Step 5.
Compare the value you read under the
"admin_guids"
directory at that index with the value
under the
"gids"
directory, to verify the change requested in Step 3 has been accepted by
the SM, and programmed into the hardware port GID table.
If the value under
admin_guids/
is different that the value under
gids/
, the request
is still in progress.
4.2.7.7 Ethernet Virtual Function Configuration when Running SR-IOV
4.2.7.7.1 VLAN Guest Tagging (VGT) and VLAN Switch Tagging (VST)
When running ETH ports on VGT, the ports may be configured to simply pass through packets as
is from VFs (Vlan Guest Tagging), or the administrator may configure the Hypervisor to silently
force packets to be associated with a VLan/Qos (Vlan Switch Tagging).
In the latter case, untagged or priority-tagged outgoing packets from the guest will have the
VLAN tag inserted, and incoming packets will have the VLAN tag removed. Any vlan-tagged
packets sent by the VF are silently dropped. The default behavior is VGT.
The feature may be controlled on the Hypervisor from userspace via iprout2 / netlink:
use:
•
where
NUM = 0..max-vf-num
•
vlan_id =
0..4095
(4095 means
"set VGT"
)
•
qos =
0..7
For example:
cd /sys/class/infiniband/mlx4_0/iov/ports/1/admin_guids
echo
a
"0x002fffff8118" > 3
a. echo "0x0" means let the SM assign a value to that GUID
echo "0xffffffffffffffff" means delete that GUID
echo
cat /sys/class/infiniband/mlx4_0/iov/ports/
/sys/class/infiniband/mlx4_0/iov/ports/
ip link set { dev DEVICE | group DEVGROUP } [ { up | down } ]
...
[ vf NUM [ mac LLADDR ]
[ vlan VLANID [ qos VLAN-QOS ] ]
...
[ spoofchk { on | off} ] ]
...
ip link set dev