Hi,
I have a network that consists of a number of docker containers running on the
same host, and vpp (v20.09) is running on one of them. The vpp has two
interfaces (created via 'create host-interface'). The problem is that when I
ping an interface's neighbor in 'vppctl' with a single echo request (i.e.,
'#vpp ping 10.100.0.2 repeat 1'), I see ~253 duplicate echo requests being
sent. Have you seen this kind of a behavior before? If I issue the same ping
command without the vpp up, it works without problem. Any tips or help would
be greatly appreciated.
Thanks,
--Hyong
===== startup conf =====
unix {
cli-listen /run/vpp/cli.sock
log /tmp/vpp.log
}
socksvr {
socket-name /run/vpp/api.sock
}
logging {
default-log-level debug
}
api-segment {
prefix vpp
}
api-trace {
on
}
===== interfaces =====
vpp# show int
Name Idx State MTU (L3/IP4/IP6/MPLS) Counter
Count
host-eth0 1 up 9000/0/0/0 rx packets
13
rx bytes 1054
tx packets 7
tx bytes 634
drops 13
ip4 5
ip6 6
host-eth2 2 up 9000/0/0/0 rx packets
1027
rx bytes 112418
tx packets 510
tx bytes 55964
drops 21
ip4 1016
ip6 7
local0 0 down 0/0/0/0
===== interface addresses =====
vpp# show int addr
host-eth0 (up):
L3 10.100.5.2/24
host-eth2 (up):
L3 10.100.0.1/24
local0 (dn):
====== ip neighbors =====
vpp# show ip neighbors
Time IP Flags Ethernet
Interface
116.3940 10.100.5.1 D 54:ed:63:8e:b6:5c
host-eth0
106.6661 10.100.0.2 D 20:6b:cb:d9:20:33
host-eth2
===== vpp routing table =====
pv4-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ] epoch:0
flags:none locks:[adjacency:1, default-route:1, nat-hi:2, ]
0.0.0.0/0
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:1 buckets:1 uRPF:0 to:[0:0]]
[0] [@0]: dpo-drop ip4
0.0.0.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:2 buckets:1 uRPF:1 to:[0:0]]
[0] [@0]: dpo-drop ip4
10.100.0.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:14 buckets:1 uRPF:15 to:[0:0]]
[0] [@0]: dpo-drop ip4
10.100.0.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:13 buckets:1 uRPF:14 to:[1:96]]
[0] [@4]: ipv4-glean: host-eth2: mtu:9000 next:2 ffffffffffff02feaac7f6c80806
10.100.0.1/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:16 buckets:1 uRPF:19 to:[516:49592]]
[0] [@2]: dpo-receive: 10.100.0.1 on host-eth2
10.100.0.2/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:17 buckets:1 uRPF:18 to:[510:48960]]
[0] [@5]: ipv4 via 10.100.0.2 host-eth2: mtu:9000 next:3
206bcbd9203302feaac7f6c80800
10.100.0.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:15 buckets:1 uRPF:17 to:[0:0]]
[0] [@0]: dpo-drop ip4
10.100.5.0/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:10 buckets:1 uRPF:9 to:[0:0]]
[0] [@0]: dpo-drop ip4
10.100.5.1/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:18 buckets:1 uRPF:20 to:[5:480]]
[0] [@5]: ipv4 via 10.100.5.1 host-eth0: mtu:9000 next:4
54ed638eb65c02fe50d983f90800
10.100.5.0/24
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:9 buckets:1 uRPF:8 to:[1:96]]
[0] [@4]: ipv4-glean: host-eth0: mtu:9000 next:1 ffffffffffff02fe50d983f90806
10.100.5.2/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:12 buckets:1 uRPF:13 to:[10:960]]
[0] [@2]: dpo-receive: 10.100.5.2 on host-eth0
10.100.5.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:11 buckets:1 uRPF:11 to:[0:0]]
[0] [@0]: dpo-drop ip4
224.0.0.0/4
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:4 buckets:1 uRPF:3 to:[0:0]]
[0] [@0]: dpo-drop ip4
240.0.0.0/4
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:3 buckets:1 uRPF:2 to:[0:0]]
[0] [@0]: dpo-drop ip4
255.255.255.255/32
unicast-ip4-chain
[@0]: dpo-load-balance: [proto:ip4 index:5 buckets:1 uRPF:4 to:[0:0]]
[0] [@0]: dpo-drop ip4
====== ping 10.100.0.2 =====
vpp# ping 10.100.0.2 repeat 1
116 bytes from 10.100.0.2: icmp_seq=1 ttl=64 time=5.2880 ms
116 bytes from 10.100.0.2: icmp_seq=1 ttl=64 time=5.4023 ms
...
116 bytes from 10.100.0.2: icmp_seq=1 ttl=64 time=22.2952 ms
Statistics: 1 sent, 254 received, -25300% packet loss
===== trace =======
------------------- Start of thread 0 vpp_main -------------------
Packet 1
00:10:35:217051: af-packet-input
af_packet: hw_if_index 2 next-index 4
tpacket2_hdr:
status 0x20000001 len 110 snaplen 110 mac 66 net 80
sec 0x5fea567e nsec 0x17700ce7 vlan 0 vlan_tpid 0
00:10:35:217065: ethernet-input
IP4: 02:fe:aa:c7:f6:c8 -> 20:6b:cb:d9:20:33
00:10:35:217071: ip4-input
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 254, length 96, checksum 0xa7d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
00:10:35:217081: ip4-lookup
fib 0 dpo-idx 2 flow hash: 0x00000000
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 254, length 96, checksum 0xa7d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
00:10:35:217086: ip4-rewrite
tx_sw_if_index 2 dpo-idx 2 : ipv4 via 10.100.0.2 host-eth2: mtu:9000 next:3
206bcbd9203302feaac7f6c80800 flow hash: 0x00000000
00000000: 206bcbd9203302feaac7f6c808004500006000000000fd01a8d20a6400010a64
00000020: 00020800e3ae738200013cb3d73d1e55050000010203040506070809
00:10:35:217091: host-eth2-output
host-eth2
IP4: 02:fe:aa:c7:f6:c8 -> 20:6b:cb:d9:20:33
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 253, length 96, checksum 0xa8d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
Packet 2
00:10:35:217051: af-packet-input
af_packet: hw_if_index 2 next-index 4
tpacket2_hdr:
status 0x20000001 len 110 snaplen 110 mac 66 net 80
sec 0x5fea567e nsec 0x1770eba3 vlan 0 vlan_tpid 0
00:10:35:217065: ethernet-input
IP4: 20:6b:cb:d9:20:33 -> 02:fe:aa:c7:f6:c8
00:10:35:217071: ip4-input
ICMP: 10.100.0.2 -> 10.100.0.1
tos 0x00, ttl 64, length 96, checksum 0xb369 dscp CS0 ecn NON_ECN
fragment id 0xb269
ICMP echo_reply checksum 0xebae
00:10:35:217081: ip4-lookup
fib 0 dpo-idx 8 flow hash: 0x00000000
ICMP: 10.100.0.2 -> 10.100.0.1
tos 0x00, ttl 64, length 96, checksum 0xb369 dscp CS0 ecn NON_ECN
fragment id 0xb269
ICMP echo_reply checksum 0xebae
00:10:35:217088: ip4-local
ICMP: 10.100.0.2 -> 10.100.0.1
tos 0x00, ttl 64, length 96, checksum 0xb369 dscp CS0 ecn NON_ECN
fragment id 0xb269
ICMP echo_reply checksum 0xebae
00:10:35:217092: ip4-icmp-input
ICMP: 10.100.0.2 -> 10.100.0.1
tos 0x00, ttl 64, length 96, checksum 0xb369 dscp CS0 ecn NON_ECN
fragment id 0xb269
ICMP echo_reply checksum 0xebae
00:10:35:217105: ip4-icmp-echo-reply
ICMP4 echo id 29570 seq 1 send to cli node 667
Packet 3 (this is a duplicate of Packet 1)
00:10:35:217189: af-packet-input
af_packet: hw_if_index 2 next-index 4
tpacket2_hdr:
status 0x20000001 len 110 snaplen 110 mac 66 net 80
sec 0x5fea567e nsec 0x177249bc vlan 0 vlan_tpid 0
00:10:35:217193: ethernet-input
IP4: 02:fe:aa:c7:f6:c8 -> 20:6b:cb:d9:20:33
00:10:35:217195: ip4-input
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 253, length 96, checksum 0xa8d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
00:10:35:217198: ip4-lookup
fib 0 dpo-idx 2 flow hash: 0x00000000
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 253, length 96, checksum 0xa8d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
00:10:35:217201: ip4-rewrite
tx_sw_if_index 2 dpo-idx 2 : ipv4 via 10.100.0.2 host-eth2: mtu:9000 next:3
206bcbd9203302feaac7f6c80800 flow hash: 0x00000000
00000000: 206bcbd9203302feaac7f6c808004500006000000000fc01a9d20a6400010a64
00000020: 00020800e3ae738200013cb3d73d1e55050000010203040506070809
00:10:35:217203: host-eth2-output
host-eth2
IP4: 02:fe:aa:c7:f6:c8 -> 20:6b:cb:d9:20:33
ICMP: 10.100.0.1 -> 10.100.0.2
tos 0x00, ttl 252, length 96, checksum 0xa9d2 dscp CS0 ecn NON_ECN
fragment id 0x0000
ICMP echo_request checksum 0xe3ae
....
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