Ping vpp tap interface via host tap interface also failed.
I checked vpp counters with ‘show runtime’, but it seems vpp doesn’t receive
any packets.
‘u16 n_left = vring->used->idx – last;’ in function
virtio_device_input_inline() is always 0.
Could you please give suggestions on root-causing the issue?
DBGvpp# show runtime
Thread 0 vpp_main (lcore 2)
Time 1.3, average vectors/node 0.00, last 128 main loops 0.00 per node 0.00
vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
Name State Calls Vectors
Suspends Clocks Vectors/Call
dpdk-process any wait 0 0
1 5.10e1 0.00
ikev2-manager-process any wait 0 0
1 5.20e1 0.00
ip6-icmp-neighbor-discovery-ev any wait 0 0
1 4.70e1 0.00
unix-cli-local:0 active 0 0
9 2.36e3 0.00
unix-epoll-input polling 382236 0
0 3.18e1 0.00
---------------
Thread 1 vpp_wk_0 (lcore 6)
Time 1.3, average vectors/node 0.00, last 128 main loops 0.00 per node 0.00
vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
Name State Calls Vectors
Suspends Clocks Vectors/Call
unix-epoll-input polling 701 0
0 1.27e1 0.00
virtio-input polling 718881 0
0 2.96e1 0.00
Thanks.
From: Lijian Zhang (Arm Technology China)
Sent: 2019年6月18日 13:35
To: vpp-dev@lists.fd.io
Cc: nd <n...@arm.com>
Subject: VPP tap interface issue on Arm servers
Hi,
We tried to create a VPP tap interface, assigned ip address to both VPP and
Linux side, and then ping VPP tap interface via host interface, and vice versa.
But ping failed on both side.
With below ping via VPP tap interface for example, it seems VPP has sent out
packets, but there’s no any counter increasing on the interface of host side.
Could you please suggest on this issue?
DBGvpp# create tap
DBGvpp# set int ip address tap0 16.0.10.2/24
DBGvpp# set int state tap0 up
$ sudo ip a add 16.0.10.1/24 dev tap0
DBGvpp# clear interfaces
DBGvpp# clear errors
DBGvpp# clear runtime
DBGvpp# ping 16.0.10.1
Statistics: 5 sent, 0 received, 100% packet loss
DBGvpp# show runtime
Thread 0 vpp_main (lcore 2)
Time 88.2, average vectors/node 1.00, last 128 main loops 0.00 per node 0.00
vector rates in 0.0000e0, out 5.6688e-2, drop 5.6688e-2, punt 0.0000e0
Name State Calls Vectors
Suspends Clocks Vectors/Call
api-rx-from-ring any wait 0 0
4 8.05e1 0.00
dhcp-client-process any wait 0 0
1 8.00e1 0.00
dpdk-process any wait 0 0
30 3.45e1 0.00
drop active 5 5
0 6.30e1 1.00
error-drop active 5 5
0 7.24e1 1.00
fib-walk any wait 0 0
44 4.35e1 0.00
ikev2-manager-process any wait 0 0
88 2.78e1 0.00
ip-neighbor-scan-process any wait 0 0
2 6.50e1 0.00
ip-route-resolver-process any wait 0 0
1 8.20e1 0.00
ip4-glean active 5 5
0 9.50e2 1.00
ip4-lookup active 5 5
0 1.39e2 1.00
ip4-reassembly-expire-walk any wait 0 0
9 4.09e1 0.00
ip6-icmp-neighbor-discovery-ev any wait 0 0
88 2.46e1 0.00
ip6-reassembly-expire-walk any wait 0 0
9 4.06e1 0.00
statseg-collector-process time wait 0 0
9 6.33e1 0.00
tap0-output active 5 5
0 8.16e1 1.00
tap0-tx active 5 5
0 7.20e1 1.00
unix-cli-stdin active 0 0
56 6.18e2 0.00
unix-epoll-input polling 25126436 0
0 3.14e1 0.00
---------------
Thread 1 vpp_wk_0 (lcore 6)
Time 88.2, average vectors/node 0.00, last 128 main loops 0.00 per node 0.00
vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
Name State Calls Vectors
Suspends Clocks Vectors/Call
unix-epoll-input polling 45817 0
0 1.47e1 0.00
virtio-input polling 46962827 0
0 2.96e1 0.00
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