Hi, Vijay,
Sorry to ask dumb question, can you make sure the interface in your VM (either
Linux Kernel or DPDK) is “UP”?
Regards,
Yichen
From: <vpp-dev@lists.fd.io> on behalf of "steven luong via Lists.Fd.Io"
<sluong=cisco....@lists.fd.io>
Reply-To: "Steven Luong (sluong)" <slu...@cisco.com>
Date: Monday, August 6, 2018 at 12:10 PM
To: "Chandra Mohan, Vijay Mohan" <vijch...@ciena.com>, "vpp-dev@lists.fd.io"
<vpp-dev@lists.fd.io>
Cc: "vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io>
Subject: Re: [vpp-dev] tx-drops with vhost-user interface
Vijay,
From the show output, I can’t really tell what your problem is. If you could
provide additional information about your environment, I could try setting it
up and see what’s wrong. Things I need from you are exact VPP version, VPP
configuration, qemu startup command line or the XML startup file if you use
virsh, and the version of the VM distro.
Steven
From: <vpp-dev@lists.fd.io> on behalf of "Chandra Mohan, Vijay Mohan"
<vijch...@ciena.com>
Date: Monday, August 6, 2018 at 10:31 AM
To: "vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io>
Subject: [vpp-dev] tx-drops with vhost-user interface
Hi,
I am trying to pass traffic with vhost-user interface and seeing tx-drops on
virtual interface. Here is the setup: created a bridge domain with a physical
interface and a vhost-user interface. Physical interface GigabitEthernet5/0/0
is connected to traffic generator. As shown below, observing drops on
VirtualEthernet0/0/0 .
Following is the config and vhost-user commands o/p:
DBGvpp# show bridge-domain 1 detail
BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding
ARP-Term BVI-Intf
1 1 0 off on on on on off
N/A
Interface If-idx ISN SHG BVI TxFlood
VLAN-Tag-Rewrite
GigabitEthernet5/0/0 3 1 0 - * none
GigabitEthernet5/0/1 4 1 0 - * none
VirtualEthernet0/0/0 5 1 0 - * none
Virtual interface is operationally up. Connected to virtual interface server in
VM.
DBGvpp# show hardware-interfaces VirtualEthernet0/0/0
Name Idx Link Hardware
VirtualEthernet0/0/0 5 up VirtualEthernet0/0/0
Ethernet address 02:fe:98:19:c2:6b
DBGvpp# show interface VirtualEthernet0/0/0
Name Idx State Counter Count
VirtualEthernet0/0/0 5 up tx packets
1
tx bytes
60
drops
1
DBGvpp# show errors
Count Node Reason
3 l2-output L2 output packets
2 l2-learn L2 learn packets
2 l2-learn L2 learn misses
2 l2-input L2 input packets
3 l2-flood L2 flood packets
1 VirtualEthernet0/0/0-tx tx packet drops (no available
descriptors)
DBGvpp# show vhost-user VirtualEthernet0/0/0
Virtio vhost-user interfaces
Global:
coalesce frames 32 time 1e-3
number of rx virtqueues in interrupt mode: 0
Interface: VirtualEthernet0/0/0 (ifindex 5)
virtio_net_hdr_sz 12
features mask (0xffffffffffffffff):
features (0x150208000):
VIRTIO_NET_F_MRG_RXBUF (15)
VIRTIO_NET_F_GUEST_ANNOUNCE (21)
VIRTIO_F_INDIRECT_DESC (28)
VHOST_USER_F_PROTOCOL_FEATURES (30)
VIRTIO_F_VERSION_1 (32)
protocol features (0x3)
VHOST_USER_PROTOCOL_F_MQ (0)
VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
socket filename /socket/vnet-0 type client errno "Success"
rx placement:
thread 0 on vring 1, polling
tx placement: lock-free
thread 0 on vring 0
Memory regions (total 3)
region fd guest_phys_addr memory_size userspace_addr
mmap_offset mmap_addr
====== ===== ================== ================== ==================
================== ==================
0 50 0x0000000100000000 0x00000001c0000000 0x00007fe393600000
0x00000000c0000000 0x00007fc0e4a00000
1 51 0x0000000000000000 0x00000000000a0000 0x00007fe2d3600000
0x0000000000000000 0x00007fc024800000
2 52 0x00000000000c0000 0x00000000bff40000 0x00007fe2d36c0000
0x00000000000c0000 0x00007fbf648c0000
Virtqueue 0 (TX)
qsz 256 last_avail_idx 0 last_used_idx 0
avail.flags 0 avail.idx 0 used.flags 1 used.idx 0
kickfd 53 callfd 54 errfd -1
Virtqueue 1 (RX)
qsz 256 last_avail_idx 0 last_used_idx 0
avail.flags 0 avail.idx 0 used.flags 1 used.idx 0
kickfd 46 callfd 55 errfd -1
Tried dumping descriptors from Rx queue and didn’t find any entries. It’s all
zeros.
Any idea what is going on here ?
Thanks,
Vijay
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