Hi,

We found a strange behavior of the E810 VLAN offload.

We are running DPDK 24.11.2 with ice driver 1.15.4, firmware 4.60 and COMMS
DDP 1.3.46

 

The NIC receives an IPv4/UDP packet inside VLAN 300.

If we run dpdk-testpmd with a single queue, everything seems fine:

 

dpdk-testpmd -a 0000:4b:00.0 -c ffffff -n 8 -- -i

 

set verbose 5

port stop 0

port config 0 rx_offload vlan_strip on

port start 0

start

 

And the packet is correctly displayed:

  src=08:02:03:04:05:06 - dst=00:1A:CA:01:00:96 - pool=mb_pool_0 -
type=0x0800 - length=142 - nb_segs=1 - VLAN tci=0x12c - hw ptype: L2_ETHER
L3_IPV4_EXT_UNKNOWN L4_UDP  - sw ptype: L2_ETHER L3_IPV4 L4_UDP  - l2_len=14
- l3_len=20 - l4_len=8 - Destination UDP port=5398 - Receive queue=0x0

  ol_flags: RTE_MBUF_F_RX_VLAN RTE_MBUF_F_RX_L4_CKSUM_GOOD
RTE_MBUF_F_RX_IP_CKSUM_GOOD RTE_MBUF_F_RX_VLAN_STRIPPED
RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD

 

But if we use a different number of queues:

 

dpdk-testpmd -a 0000:4b:00.0 -c ffffff -n 8 -- -i --rxq=4 --txq=4

 

The VLAN is in fact removed, but there is no evidence of that:

 

  src=08:02:03:04:05:06 - dst=00:1A:CA:01:00:96 - pool=mb_pool_0 -
type=0x0800 - length=142 - nb_segs=1 - RSS hash=0xfae3080 - RSS queue=0x0 -
hw ptype: L2_ETHER L3_IPV4_EXT_UNKNOWN L4_UDP  - sw ptype: L2_ETHER L3_IPV4
L4_UDP  - l2_len=14 - l3_len=20 - l4_len=8 - Destination UDP port=5398 -
Receive queue=0x0

  ol_flags: RTE_MBUF_F_RX_RSS_HASH RTE_MBUF_F_RX_L4_CKSUM_GOOD
RTE_MBUF_F_RX_IP_CKSUM_GOOD RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD

 

There was a bug in some previous versions of DPDK about E810 and VLAN
offload, but it was fixed.

Are we doing something wrong or is there a problem with the driver?

 

Thank you

               Ernesto