xuanyuanaosheng commented on issue #7838:
URL: https://github.com/apache/cloudstack/issues/7838#issuecomment-1692814768
@weizhouapache
I have dump on one blade server using `tcpdump -i cloudbr1 port 8472 -nn -s0
-e -vvv`:
the detail as:
```
13:50:05.839405 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 140: (tos 0x0, ttl 10, id 58443, offset 0, flags [none], proto
UDP (17), length 126)
10.71.231.43.60487 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 90:
(tos 0x0, ttl 64, id 53547, offset 0, flags [DF], proto UDP (17), length 76)
10.28.21.93.37196 > 10.25.28.26.123: [udp sum ok] NTPv4, length 48
Client, Leap indicator: (0), Stratum 0 (unspecified), poll 7 (128s),
precision 32
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: (unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 2349871944.725348397 (1974/06/19 22:12:24)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 2349871944.725348397 (1974/06/19
22:12:24)
13:50:05.840273 20:67:7c:19:67:78 > ac:16:2d:ab:e3:e4, ethertype IPv4
(0x0800), length 140: (tos 0x0, ttl 10, id 53841, offset 0, flags [none], proto
UDP (17), length 126)
10.71.231.42.54654 > 10.71.231.43.8472: [bad udp cksum 0xe35f ->
0xae97!] OTV, flags [I] (0x08), overlay 0, instance 2884
02:00:1e:2d:00:02 > 02:00:46:bf:00:03, ethertype IPv4 (0x0800), length 90:
(tos 0xc0, ttl 60, id 36401, offset 0, flags [DF], proto UDP (17), length 76)
10.25.28.26.123 > 10.28.21.93.37196: [udp sum ok] NTPv4, length 48
Server, Leap indicator: (0), Stratum 2 (secondary reference), poll 7
(128s), precision -23
Root Delay: 0.082061, Root dispersion: 0.046310, Reference-ID:
58.176.194.96
Reference Timestamp: 3901930443.431726703 (2023/08/25 13:34:03)
Originator Timestamp: 2349871944.725348397 (1974/06/19 22:12:24)
Receive Timestamp: 3901931405.840823480 (2023/08/25 13:50:05)
Transmit Timestamp: 3901931405.840973115 (2023/08/25 13:50:05)
Originator - Receive Timestamp: +1552059461.115475082
Originator - Transmit Timestamp: +1552059461.115624717
13:50:06.672705 20:67:7c:19:67:78 > 01:00:5e:00:0a:f6, ethertype IPv4
(0x0800), length 92: (tos 0x0, ttl 10, id 38002, offset 0, flags [none], proto
UDP (17), length 78)
10.71.231.42.41486 > 239.0.10.246.8472: [bad udp cksum 0xebb3 ->
0x2505!] OTV, flags [I] (0x08), overlay 0, instance 2806
02:00:6e:3c:00:01 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42:
Ethernet (len 6), IPv4 (len 4), Request who-has 10.28.17.254 tell 10.28.17.30,
length 28
13:50:07.696709 20:67:7c:19:67:78 > 01:00:5e:00:0a:f6, ethertype IPv4
(0x0800), length 92: (tos 0x0, ttl 10, id 38718, offset 0, flags [none], proto
UDP (17), length 78)
10.71.231.42.41486 > 239.0.10.246.8472: [bad udp cksum 0xebb3 ->
0x2505!] OTV, flags [I] (0x08), overlay 0, instance 2806
02:00:6e:3c:00:01 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42:
Ethernet (len 6), IPv4 (len 4), Request who-has 10.28.17.254 tell 10.28.17.30,
length 28
13:50:07.919105 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 232: (tos 0x0, ttl 10, id 58519, offset 0, flags [none], proto
UDP (17), length 218)
10.71.231.43.45383 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 182:
(tos 0x0, ttl 64, id 3640, offset 0, flags [DF], proto UDP (17), length 168)
10.28.21.93.50574 > 10.25.9.129.514: [udp sum ok] SYSLOG, length: 140
Facility daemon (3), Severity info (6)
Msg: Aug 25 13:50:07 debian231 telegraf[857]: 2023-08-25T05:50:07Z W!
[outputs.influxdb] Metric buffer overflow; 31 metrics have been dropped
0x0000: 3c33 303e 4175 6720 3235 2031 333a 3530
0x0010: 3a30 3720 6465 6269 616e 3233 3120 7465
0x0020: 6c65 6772 6166 5b38 3537 5d3a 2032 3032
0x0030: 332d 3038 2d32 3554 3035 3a35 303a 3037
0x0040: 5a20 5721 205b 6f75 7470 7574 732e 696e
0x0050: 666c 7578 6462 5d20 4d65 7472 6963 2062
0x0060: 7566 6665 7220 6f76 6572 666c 6f77 3b20
0x0070: 3331 206d 6574 7269 6373 2068 6176 6520
0x0080: 6265 656e 2064 726f 7070 6564
13:50:07.919144 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 232: (tos 0x0, ttl 10, id 58520, offset 0, flags [none], proto
UDP (17), length 218)
10.71.231.43.59843 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 182:
(tos 0x0, ttl 64, id 9111, offset 0, flags [DF], proto UDP (17), length 168)
10.28.21.93.51379 > 10.26.0.17.51554: [udp sum ok] UDP, length 140
13:50:07.919256 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 339: (tos 0x0, ttl 10, id 58521, offset 0, flags [none], proto
UDP (17), length 325)
10.71.231.43.45383 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 289:
(tos 0x0, ttl 64, id 3641, offset 0, flags [DF], proto UDP (17), length 275)
10.28.21.93.50574 > 10.25.9.129.514: [udp sum ok] SYSLOG, length: 247
Facility daemon (3), Severity info (6)
Msg: Aug 25 13:50:07 debian231 telegraf[857]: 2023-08-25T05:50:07Z E!
[outputs.influxdb] When writing to [http://localhost:8086]: failed doing req:
Post "http://localhost:8086/write?db=telegraf": dial tcp 127.0.0.1:8086:
connect: connection refused
0x0000: 3c33 303e 4175 6720 3235 2031 333a 3530
0x0010: 3a30 3720 6465 6269 616e 3233 3120 7465
0x0020: 6c65 6772 6166 5b38 3537 5d3a 2032 3032
0x0030: 332d 3038 2d32 3554 3035 3a35 303a 3037
0x0040: 5a20 4521 205b 6f75 7470 7574 732e 696e
0x0050: 666c 7578 6462 5d20 5768 656e 2077 7269
0x0060: 7469 6e67 2074 6f20 5b68 7474 703a 2f2f
0x0070: 6c6f 6361 6c68 6f73 743a 3830 3836 5d3a
0x0080: 2066 6169 6c65 6420 646f 696e 6720 7265
0x0090: 713a 2050 6f73 7420 2268 7474 703a 2f2f
0x00a0: 6c6f 6361 6c68 6f73 743a 3830 3836 2f77
0x00b0: 7269 7465 3f64 623d 7465 6c65 6772 6166
0x00c0: 223a 2064 6961 6c20 7463 7020 3132 372e
0x00d0: 302e 302e 313a 3830 3836 3a20 636f 6e6e
0x00e0: 6563 743a 2063 6f6e 6e65 6374 696f 6e20
0x00f0: 7265 6675 7365 64
13:50:07.919305 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 231: (tos 0x0, ttl 10, id 58522, offset 0, flags [none], proto
UDP (17), length 217)
10.71.231.43.45383 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 181:
(tos 0x0, ttl 64, id 3642, offset 0, flags [DF], proto UDP (17), length 167)
10.28.21.93.50574 > 10.25.9.129.514: [udp sum ok] SYSLOG, length: 139
Facility daemon (3), Severity info (6)
Msg: Aug 25 13:50:07 debian231 telegraf[857]: 2023-08-25T05:50:07Z E!
[agent] Error writing to outputs.influxdb: could not write any address
0x0000: 3c33 303e 4175 6720 3235 2031 333a 3530
0x0010: 3a30 3720 6465 6269 616e 3233 3120 7465
0x0020: 6c65 6772 6166 5b38 3537 5d3a 2032 3032
0x0030: 332d 3038 2d32 3554 3035 3a35 303a 3037
0x0040: 5a20 4521 205b 6167 656e 745d 2045 7272
0x0050: 6f72 2077 7269 7469 6e67 2074 6f20 6f75
0x0060: 7470 7574 732e 696e 666c 7578 6462 3a20
0x0070: 636f 756c 6420 6e6f 7420 7772 6974 6520
0x0080: 616e 7920 6164 6472 6573 73
13:50:07.919331 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 339: (tos 0x0, ttl 10, id 58523, offset 0, flags [none], proto
UDP (17), length 325)
10.71.231.43.59843 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 289:
(tos 0x0, ttl 64, id 9112, offset 0, flags [DF], proto UDP (17), length 275)
10.28.21.93.51379 > 10.26.0.17.51554: [udp sum ok] UDP, length 247
13:50:07.919349 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 231: (tos 0x0, ttl 10, id 58524, offset 0, flags [none], proto
UDP (17), length 217)
10.71.231.43.59843 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 181:
(tos 0x0, ttl 64, id 9113, offset 0, flags [DF], proto UDP (17), length 167)
10.28.21.93.51379 > 10.26.0.17.51554: [udp sum ok] UDP, length 139
13:50:11.311207 ac:16:2d:ab:e3:e4 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 92: (tos 0x0, ttl 10, id 60371, offset 0, flags [none], proto
UDP (17), length 78)
10.71.231.43.36573 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:46:bf:00:03 > 02:00:1e:2d:00:02, ethertype ARP (0x0806), length 42:
Ethernet (len 6), IPv4 (len 4), Request who-has 10.28.21.254 tell 10.28.21.93,
length 28
13:50:11.311483 20:67:7c:19:67:78 > ac:16:2d:ab:e3:e4, ethertype IPv4
(0x0800), length 92: (tos 0x0, ttl 10, id 58172, offset 0, flags [none], proto
UDP (17), length 78)
10.71.231.42.41486 > 10.71.231.43.8472: [bad udp cksum 0xe32f ->
0xe5e0!] OTV, flags [I] (0x08), overlay 0, instance 2884
02:00:1e:2d:00:02 > 02:00:46:bf:00:03, ethertype ARP (0x0806), length 42:
Ethernet (len 6), IPv4 (len 4), Reply 10.28.21.254 is-at 02:00:1e:2d:00:02,
length 28
13:50:13.070991 f4:03:43:9b:a4:c8 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 232: (tos 0x0, ttl 10, id 61949, offset 0, flags [none], proto
UDP (17), length 218)
10.71.231.41.43183 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:3c:f3:00:04 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 182:
(tos 0x0, ttl 64, id 7503, offset 0, flags [DF], proto UDP (17), length 168)
10.28.21.129.57996 > 10.25.9.129.514: [udp sum ok] SYSLOG, length: 140
Facility daemon (3), Severity info (6)
Msg: Aug 25 13:50:12 debian251 telegraf[872]: 2023-08-25T05:50:12Z W!
[outputs.influxdb] Metric buffer overflow; 31 metrics have been dropped
0x0000: 3c33 303e 4175 6720 3235 2031 333a 3530
0x0010: 3a31 3220 6465 6269 616e 3235 3120 7465
0x0020: 6c65 6772 6166 5b38 3732 5d3a 2032 3032
0x0030: 332d 3038 2d32 3554 3035 3a35 303a 3132
0x0040: 5a20 5721 205b 6f75 7470 7574 732e 696e
0x0050: 666c 7578 6462 5d20 4d65 7472 6963 2062
0x0060: 7566 6665 7220 6f76 6572 666c 6f77 3b20
0x0070: 3331 206d 6574 7269 6373 2068 6176 6520
0x0080: 6265 656e 2064 726f 7070 6564
13:50:13.071006 f4:03:43:9b:a4:c8 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 232: (tos 0x0, ttl 10, id 61951, offset 0, flags [none], proto
UDP (17), length 218)
10.71.231.41.33434 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:3c:f3:00:04 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 182:
(tos 0x0, ttl 64, id 16426, offset 0, flags [DF], proto UDP (17), length 168)
10.28.21.129.45903 > 10.26.0.17.51554: [udp sum ok] UDP, length 140
13:50:13.070991 f4:03:43:9b:a4:c8 > 20:67:7c:19:67:78, ethertype IPv4
(0x0800), length 339: (tos 0x0, ttl 10, id 61950, offset 0, flags [none], proto
UDP (17), length 325)
10.71.231.41.43183 > 10.71.231.42.8472: [udp sum ok] OTV, flags [I]
(0x08), overlay 0, instance 2884
02:00:3c:f3:00:04 > 02:00:1e:2d:00:02, ethertype IPv4 (0x0800), length 289:
(tos 0x0, ttl 64, id 7504, offset 0, flags [DF], proto UDP (17), length 275)
10.28.21.129.57996 > 10.25.9.129.514: [udp sum ok] SYSLOG, length: 247
Facility daemon (3), Severity info (6)
```
I think this is the key error:
```
10.71.231.42.41486 > 10.71.231.43.8472: [bad udp cksum 0xe32f ->
0xe5e0!] OTV, flags [I] (0x08), overlay 0, instance 2884
02:00:1e:2d:00:02 > 02:00:46:bf:00:03, ethertype ARP (0x0806), length 42:
Ethernet (len 6), IPv4 (len 4), Reply 10.28.21.254 is-at 02:00:1e:2d:00:02,
length 28
```
Any idears?
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