Ben,
I'm glad you got it to work - thanks for the info!
Interestingly, I had already modified those 4 lines in dpdk.mk from 'n' to 'y'
and I still get the "EAL: Driver cannot attach the device" errors when starting
VPP.
I noticed in your config file above that it says DPDK_VERSION ?= 19.08. My
dpdk.ml file currently shows DPDK_VERSION ?= 19.05 because I am trying to build
and use VPP version 19.08.1-release and I believe DPDK 19.05 is the
corresponding version to use with this version of VPP. Which version of VPP did
you use in your current test environment where you got the devices to attach
properly? Perhaps one that is meant to be used with DPDK_VERSION 19.08?
Also, could you please share the dpdk section of your VPP startup.conf? Mine
looks like this:
dpdk {
dev 0002:00:02.0
vdev net_vdev_netvsc0,iface=eth1
dev 0003:00:02.0
vdev net_vdev_netvsc1,iface=eth2
}
On another note, when you say that I should use static ARP as a workaround, I
assume you mean using VPP's 'set ip arp' command, right?
One other thing my colleague discovered that might affect the situation is
weirdness with the TAP interfaces on Azure (dtap0 and dtap1) when DPDK is
binding to interfaces using vdev_netsvc. Basically, dtap1 was getting renamed
to one of the 'renameX' interfaces which was preventing DPDK's testpmd from
forwarding traffic and I'm wondering if this could be related to the ARP issues
you're seeing. Creating the /etc/systemd/network/10dtap.link file containing
the following solved this issue:
[Match]
OriginalName=dtap*
[Link]
NamePolicy=kernel
This change might require a 'sudo systemctl daemon-reload' to take effect, not
sure.
Thanks,
Chris
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