I am using VPP v21.06. Enabled linux-cp plugin. Created lcp as follows:
vppctl lcp create tn-eth2 host-if vpp2 netns inline_mgt_net
vppctl ip mroute add 224.0.0.0/24 via local Forward
vppctl ip mroute add 224.0.0.0/24 via tn-eth2 Accept
Then bring up vpp2 in Linux:
ip netns exec inline_mgt_net ip addr add 192.168.100.5/24 dev vpp2
ip netns exec inline_mgt_net ip link set dev vpp2 up
When I ping from my host (192.168.100.20) to 192.168.100.5 via tn-eth2, I can
see packets get sent out via tap3, but using tshark in Linux trying to see
packets on vpp2, I don't see any packets received on vpp2. ifconfig also show
vpp2 has no Rx packets:
bash-4.2# ip netns exec inline_mgt_net ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 57333 bytes 3304558 (3.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 57333 bytes 3304558 (3.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vpp2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 2004
inet 192.168.100.5 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 fe80::f816:3fff:fe3a:2883 prefixlen 64 scopeid 0x20<link>
ether fa:16:3f:3a:28:83 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 842 bytes 65492 (63.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Packet trace in VPP:
Packet 1
02:16:23:738692: dpdk-input
tn-eth2 rx queue 0
buffer 0x9a8d7: current data 0, length 98, buffer-pool 0, ref-count 1,
totlen-nifb 0, trace handle 0x0
ext-hdr-valid
l4-cksum-computed l4-cksum-correct
PKT MBUF: port 2, nb_segs 1, pkt_len 98
buf_len 2176, data_len 98, ol_flags 0x0, data_off 128, phys_addr 0xaaaa3640
packet_type 0x0 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
rss 0x0 fdir.hi 0x0 fdir.lo 0x0
IP4: fa:16:3f:53:ad:d6 -> fa:16:3f:3a:28:83
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738719: ethernet-input
frame: flags 0x1, hw-if-index 3, sw-if-index 3
IP4: fa:16:3f:53:ad:d6 -> fa:16:3f:3a:28:83
02:16:23:738730: ip4-input
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738737: ip4-lookup
fib 0 dpo-idx 10 flow hash: 0x00000000
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738742: ip4-local
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738745: ip4-icmp-input
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738746: ip4-punt
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
02:16:23:738749: ip4-punt-redirect
via redirect:0
02:16:23:738751: ip4-dvr-dpo
sw_if_index:7
02:16:23:738753: ip4-dvr-reinject
sw_if_index:7
02:16:23:738754: tap3-output
tap3 qos_class: 0 qos_type : 0
IP4: fa:16:3f:53:ad:d6 -> fa:16:3f:3a:28:83
ICMP: 192.168.100.20 -> 192.168.100.5
tos 0x00, ttl 64, length 84, checksum 0xf6a3 dscp CS0 ecn NON_ECN
fragment id 0xfa9a, flags DONT_FRAGMENT
ICMP echo_request checksum 0x9a6a id 15858
vpp# show lcp
lcp default netns '<unset>'
itf-pair: [0] tn-eth2 tap3 vpp2 11 type tap netns inline_mgt_net
vpp# show int
Name Idx State MTU (L3/IP4/IP6/MPLS)
Counter Count
host-vpp-veth 4 up 9000/0/0/0 rx packets
318
rx bytes
20450
tx packets
410
tx bytes
26380
drops
3
ip4
181
ip6
2
ipip0 5 up 9000/0/0/0 rx packets
274
rx bytes
26832
ip4
274
ipip1 6 up 9000/0/0/0 tx packets
180
tx bytes
22244
local0 0 down 0/0/0/0
tap3 7 up 9000/0/0/0 rx packets
832
rx bytes
64712
tx packets
7954
tx bytes
766484
drops
7704
ip4
815
ip6
17
tn-eth0 1 up 9000/0/0/0 rx packets
1033
rx bytes
113410
tx packets
748
tx bytes
75784
drops
275
ip4
829
ip6
2
tn-eth1 2 up 9000/0/0/0 rx packets
733
rx bytes
75370
tx packets
910
tx bytes
99792
drops
274
ip4
547
ip6
2
tn-eth2 3 up 9000/0/0/0 rx packets
8183
rx bytes
776322
tx packets
1048
tx bytes
73712
drops
7
ip4
7957
ip6
4
vpp# show error
Count Node Reason
Severity
1094 ikev2-ip4 processed
info
2 ikev2-ip4 ike_sa_init_retransmit
info
542 ikev2-ip4 keepalive
info
4 ikev2-ip4 rekey_req
info
4 ikev2-ip4 init_sa_req
info
2 ikev2-ip4 ike_auth_req
info
11 dpdk-input no error
error
741 arp-reply ARP replies sent
error
542 ip4-udp-lookup No error
error
274 esp4-decrypt-tun ESP pkts received
error
180 esp4-encrypt-tun ESP pkts received
error
274 ipsec4-tun-input good packets received
error
7 ipsec4-tun-input no matching tunnel
error
181 ip4-inacl input ACL misses
error
1 ip4-input valid ip4 packets
error
3 ip4-input Multicast RPF check failed
error
6 ip4-local ip4 spoofed local-address packet
dr error
2 ethernet-input no error
error
7 punt-dispatch No registrations
error
7702 tap3-tx no free tx slots
error
I don't know if the tap3-tx error "no free tx slots" is the reason why vpp2 not
receiving any packets. If it is the cause, how can I fix it?
Thanks for your attention.
Wei
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