++,
Hi Raktim,
> -----Original Message-----
> From: users <users-boun...@dpdk.org> On Behalf Of raktim bhatt
> Sent: Saturday, January 16, 2021 10:46 AM
> To: users@dpdk.org
> Subject: [dpdk-users] DPDK: MPLS packet processing
>
> Hi All,
>
> I am trying to build a multi-RX-queue dpdk program, using RSS to split the
> incoming traffic into RX queues on a single port. Mellanox ConnectX-5 and
> DPDK Version 19.11 is used for this purpose. It works fine when I use IP
> over Ethernet packets as input. However when the packet contains IP over
> MPLS over Ethernet, RSS does not seem to work. As a result, all packets
> belonging to various flows (with different src & dst IPs, ports over MPLS)
> are all sent into the same RX queue.
>
>
> My queries are
>
> 1. Is there any parameter/techniques in DPDK to distribute MPLS packets to
> multiple RX queues?
>
I've tried it over my setup with testpmd:
./build/app/dpdk-testpmd -n 4 -w 0000:08:00.0 -- --mbcache=512 -i --nb-cores=27
--rxq=4 --txq=4 --rss-ip
testpmd> set verbose 1
testpmd> start
then tried to send two MPLS packets with different src IP:
packet1 = Ether()/MPLS()/IP(src='1.1.1.1')
packet2 = Ether()/MPLS()/IP(src='1.1.1.2')
and I see that both packets are being spread over the queues, see the bellow
testpmd dump output:
testpmd> port 0/queue 3: received 1 packets
src=00:00:00:00:00:00 - dst=FF:FF:FF:FF:FF:FF - type=0x8847 - length=60 -
nb_segs=1 - RSS hash=0x43781943 - RSS queue=0x3 - hw ptype: L2_ETHER
L3_IPV4_EXT_UNKNOWN L4_NONFRAG - sw ptype: L2_ETHER - l2_len=14 - Receive
queue=0x3
ol_flags: PKT_RX_RSS_HASH PKT_RX_L4_CKSUM_UNKNOWN PKT_RX_IP_CKSUM_GOOD
PKT_RX_OUTER_L4_CKSUM_UNKNOWN
port 0/queue 1: received 1 packets
src=00:00:00:00:00:00 - dst=FF:FF:FF:FF:FF:FF - type=0x8847 - length=60 -
nb_segs=1 - RSS hash=0xb8631e05 - RSS queue=0x1 - hw ptype: L2_ETHER
L3_IPV4_EXT_UNKNOWN L4_NONFRAG - sw ptype: L2_ETHER - l2_len=14 - Receive
queue=0x1
ol_flags: PKT_RX_RSS_HASH PKT_RX_L4_CKSUM_UNKNOWN PKT_RX_IP_CKSUM_GOOD
PKT_RX_OUTER_L4_CKSUM_UNKNOWN
first packet was received on queue 3 and the second one was received over queue
1,
by the way, this is with both 19.11.0 and v19.11.6
> 2. Is there any way to strip off MPLS tags (between Eth and IP) in
> hardware, something like hw_vlan_strip?
>
For this I'm not sure we have such thing in dpdk maybe Thomas can confirm this
here?
>
> My Port configuration is
>
>
> const struct rte_eth_conf default_port_conf = {
>
> .rxmode = {
>
> .hw_vlan_strip = 0, /* VLAN strip enabled. */
>
> .header_split = 0, /* Header Split disabled. */
>
> .hw_ip_checksum = 0, /* IP checksum offload disabled. */
>
> .hw_strip_crc = 0, /* CRC stripping by hardware disabled.
> */
>
> },
>
> .rx_adv_conf = {
>
> .rss_conf = {
>
> .rss_key = NULL,
>
> .rss_key_len = 0,
>
> .rss_hf = ETH_RSS_IP,
>
> },
>
> } };
>
> _______________________
>
>
> Thanks and Regards
>
> Raktim Bhatt
