[j-nsp] VMX 17.1 experiencing high latency/packet loss with SRIOV

[stephane.litkowski at orange.com]

Hi,

We are trying to setup a VMX in 17.1R1 in SRIOV mode.
When trying to ping a directly connected physical node over one of the SRIOV interface, we experience packet losses and a very high latency.
There is no issue with the virtio interfaces (like management...) that have a normal behavior, only SRIOV interfaces experience this issue.
Pinging VFP from the VCP does not show any issue also.
Pinging from the host OS through the same NIC port (over the PF) has no issue also (so this is not a cabling issue or whatever).
The NIC is an Intel XL710 running at 10Gbps.

VMX6 at VMX6> ping 111.0.0.34
PING 111.0.0.34 (111.0.0.34): 56 data bytes
64 bytes from 111.0.0.34: icmp_seq=0 ttl=64 time=1084.838 ms
64 bytes from 111.0.0.34: icmp_seq=1 ttl=64 time=83.023 ms
64 bytes from 111.0.0.34: icmp_seq=2 ttl=64 time=3080.092 ms
64 bytes from 111.0.0.34: icmp_seq=3 ttl=64 time=2072.148 ms
64 bytes from 111.0.0.34: icmp_seq=4 ttl=64 time=1070.143 ms
64 bytes from 111.0.0.34: icmp_seq=5 ttl=64 time=62.151 ms
64 bytes from 111.0.0.34: icmp_seq=6 ttl=64 time=2059.215 ms
64 bytes from 111.0.0.34: icmp_seq=7 ttl=64 time=1051.287 ms
64 bytes from 111.0.0.34: icmp_seq=8 ttl=64 time=49.274 ms
64 bytes from 111.0.0.34: icmp_seq=9 ttl=64 time=1211.442 ms
64 bytes from 111.0.0.34: icmp_seq=10 ttl=64 time=204.125 ms
64 bytes from 111.0.0.34: icmp_seq=11 ttl=64 time=3040.642 ms
64 bytes from 111.0.0.34: icmp_seq=12 ttl=64 time=2039.201 ms
64 bytes from 111.0.0.34: icmp_seq=13 ttl=64 time=1033.807 ms
64 bytes from 111.0.0.34: icmp_seq=14 ttl=64 time=31.215 ms
^C
--- 111.0.0.34 ping statistics ---
18 packets transmitted, 15 packets received, 16% packet loss
round-trip min/avg/max/stddev = 31.215/1211.507/3080.092/1014.173 ms


Does anyone already faced this issue ?

Brgds,

Stephane

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