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some packet loss and other weirdness when running weave in NAT'ed VMs #469
Open
Description
MongoDB host machine: dell R620 server (40 cores, 128GB ram) Ubuntu 14.04, Docker 1.4.1 uname -a:
Linux london 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Client machine: Ubuntu 14.04 VMWare Fusion 7.1.1 VM (hardware version 11) (provisioned 12GB RAM + 8 cores), Docker 1.5.0 uname -a:
Linux ubuntu 3.13.0-46-generic #77-Ubuntu SMP Mon Mar 2 18:23:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Both are using the latest weave release:
sudo weave version
weave script 0.9.0
weave router 0.9.0
weave DNS 0.9.0
weave tools 0.9.0
The client is able to insert small documents into MongoDB over the weave network, but unable to insert large documents, output from sudo tcpdump -i weave on the client machine shows messages about "need to frag"
Sample server setup (server physical IP is 192.168.130.95):
sudo weave stop
sudo weave reset
sudo weave launch
sudo weave expose 10.0.9.101/24
sudo weave run 10.0.9.19/24 -d -t --name=mongo1 -p :27017:27017 mongo:3.0.0 mongod --storageEngine wiredTiger
Client setup:
sudo weave stop
sudo weave reset
sudo weave launch 192.168.130.95
sudo weave expose 10.0.9.102/24
Small write over weave network from client:
docker run -it --rm mongo:3.0.0 mongo "10.0.9.19:27017/test" --eval "db.somecollection.insert({ a: 'bc'});"
MongoDB shell version: 3.0.0-rc8
connecting to: 10.0.9.19:27017/test
WriteResult({ "nInserted" : 1 })
Large write over the weave network from client (hangs):
docker run -it --rm mongo:3.0.0 mongo "10.0.9.19:27017/test" --eval "db.somecollection.insert({ a: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'});"
MongoDB shell version: 3.0.0-rc8
connecting to: 10.0.9.19:27017/test
Same large write over the physical network (works fine):
docker run -it --rm mongo:3.0.0 mongo "192.168.130.95:27017/test" --eval "db.somecollection.insert({ a: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'});"
MongoDB shell version: 3.0.0-rc8
connecting to: 192.168.130.95:27017/test
WriteResult({ "nInserted" : 1 })
Output from client sudo tcpdump -i weave
listening on weave, link-type EN10MB (Ethernet), capture size 65535 bytes
10:50:55.405307 ARP, Request who-has 10.0.9.19 tell 10.0.9.102, length 28
10:50:55.407795 ARP, Reply 10.0.9.19 is-at be:1b:9e:e8:24:8e (oui Unknown), length 28
10:50:55.407832 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [S], seq 164960364, win 29200, options [mss 1460,sackOK,TS val 20069498 ecr 0,nop,wscale 7], length 0
10:50:55.409096 IP 10.0.9.19.27017 > 172.17.0.24.47892: Flags [S.], seq 2370793204, ack 164960365, win 43690, options [mss 65495,sackOK,TS val 15892260 ecr 20069498,nop,wscale 7], length 0
10:50:55.409137 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], ack 2370793205, win 229, options [nop,nop,TS val 20069499 ecr 15892260], length 0
10:50:55.409334 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [P.], seq 0:60, ack 1, win 229, options [nop,nop,TS val 20069499 ecr 15892260], length 60
10:50:55.410562 IP 10.0.9.19.27017 > 172.17.0.24.47892: Flags [.], ack 61, win 342, options [nop,nop,TS val 15892261 ecr 20069499], length 0
10:50:55.411040 IP 10.0.9.19.27017 > 172.17.0.24.47892: Flags [P.], seq 1:80, ack 61, win 342, options [nop,nop,TS val 15892261 ecr 20069499], length 79
10:50:55.411074 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], ack 80, win 229, options [nop,nop,TS val 20069499 ecr 15892261], length 0
10:50:55.412388 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [P.], seq 60:122, ack 80, win 229, options [nop,nop,TS val 20069500 ecr 15892261], length 62
10:50:55.414015 IP 10.0.9.19.27017 > 172.17.0.24.47892: Flags [P.], seq 80:274, ack 123, win 342, options [nop,nop,TS val 15892261 ecr 20069500], length 194
10:50:55.416389 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [P.], seq 122:955, ack 274, win 237, options [nop,nop,TS val 20069501 ecr 15892261], length 833
10:50:55.416545 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:50:55.416597 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20069501 ecr 15892261], length 500
10:50:55.416602 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [P.], seq 622:955, ack 274, win 237, options [nop,nop,TS val 20069501 ecr 15892261], length 333
10:50:55.416633 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:50:55.418500 IP 10.0.9.19.27017 > 172.17.0.24.47892: Flags [.], ack 123, win 350, options [nop,nop,TS val 15892263 ecr 20069500,nop,nop,sack 1 {623:956}], length 0
10:50:55.620941 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20069552 ecr 15892263], length 500
10:50:55.621070 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:50:56.028061 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20069654 ecr 15892263], length 500
10:50:56.028278 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:50:56.845105 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20069858 ecr 15892263], length 500
10:50:56.845278 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:50:58.479914 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20070267 ecr 15892263], length 500
10:50:58.480052 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
10:51:01.748340 IP 10.0.9.102.47892 > 10.0.9.19.27017: Flags [.], seq 122:622, ack 274, win 237, options [nop,nop,TS val 20071084 ecr 15892263], length 500
10:51:01.748508 IP 10.0.9.19 > 172.17.0.24: ICMP 10.0.9.19 unreachable - need to frag (mtu 490), length 36
Server docker logs weave output
weave 2015/03/18 14:41:05.486129 Command line options: map[wait:20 iface:ethwe name:7a:46:86:82:f5:92]
weave 2015/03/18 14:41:05.486195 Command line peers: []
weave 2015/03/18 14:41:06.487123 Communication between peers is unencrypted.
weave 2015/03/18 14:41:06.487661 Our name is 7a:46:86:82:f5:92
weave 2015/03/18 14:41:06.518895 Sniffing traffic on &{312 65535 ethwe d6:9e:64:84:78:ca up|broadcast|multicast}
weave 2015/03/18 14:41:06.518944 Discovered our MAC d6:9e:64:84:78:ca
weave 2015/03/18 14:41:06.614431 Discovered local MAC 32:ac:71:ec:0d:24
weave 2015/03/18 14:41:06.990526 Discovered local MAC 7a:46:86:82:f5:92
weave 2015/03/18 14:41:08.091084 ->[192.168.70.25:51570] connection accepted
weave 2015/03/18 14:41:08.092523 ->[192.168.70.25:51570] completed handshake with 7a:8a:74:ed:7c:64
weave 2015/03/18 14:41:08.092873 ->[7a:8a:74:ed:7c:64]: connection added
weave 2015/03/18 14:41:08.095855 ->[7a:8a:74:ed:7c:64]: connection fully established
weave 2015/03/18 14:41:08.095909 EMSGSIZE on send, expecting PMTU update (IP packet was 60064 bytes, payload was 60056 bytes)
weave 2015/03/18 14:41:08.095928 ->[7a:8a:74:ed:7c:64]: Effective PMTU set to 1438
weave 2015/03/18 14:41:08.099198 ->[7a:8a:74:ed:7c:64]: Effective PMTU verified at 1438
weave 2015/03/18 14:41:08.735417 Discovered remote MAC 7a:8a:74:ed:7c:64 at 7a:8a:74:ed:7c:64
weave 2015/03/18 14:41:22.966496 Discovered local MAC aa:df:0e:2b:63:f1
weave 2015/03/18 14:41:47.170530 ->[7a:8a:74:ed:7c:64]: connection shutting down due to error: EOF
weave 2015/03/18 14:41:47.170646 Removed unreachable Peer 7a:8a:74:ed:7c:64 (v5) (UID 17900529838048737883)
weave 2015/03/18 14:41:47.170690 ->[7a:8a:74:ed:7c:64]: connection deleted
weave 2015/03/18 14:41:49.646219 ->[192.168.70.25:51585] connection accepted
weave 2015/03/18 14:41:49.647336 ->[192.168.70.25:51585] completed handshake with 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:41:49.647479 ->[7a:67:a3:ad:5c:1e]: connection added
weave 2015/03/18 14:41:49.657602 ->[7a:67:a3:ad:5c:1e]: connection fully established
weave 2015/03/18 14:41:49.657720 EMSGSIZE on send, expecting PMTU update (IP packet was 60064 bytes, payload was 60056 bytes)
weave 2015/03/18 14:41:49.657740 ->[7a:67:a3:ad:5c:1e]: Effective PMTU set to 1438
weave 2015/03/18 14:41:49.699386 ->[7a:67:a3:ad:5c:1e]: Effective PMTU verified at 1438
weave 2015/03/18 14:41:50.059363 Discovered remote MAC 86:98:15:dd:e4:ef at 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:41:50.311578 Discovered remote MAC 7a:67:a3:ad:5c:1e at 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:46:42.586514 Discovered local MAC be:1b:9e:e8:24:8e
weave 2015/03/18 14:51:06.527351 Expired MAC d6:9e:64:84:78:ca at 7a:46:86:82:f5:92
weave 2015/03/18 14:52:06.527639 Expired MAC 32:ac:71:ec:0d:24 at 7a:46:86:82:f5:92
weave 2015/03/18 14:52:06.527653 Expired MAC 7a:46:86:82:f5:92 at 7a:46:86:82:f5:92
weave 2015/03/18 14:57:06.528694 Expired MAC aa:df:0e:2b:63:f1 at 7a:46:86:82:f5:92
Client docker logs weave output
weave 2015/03/18 14:41:48.704557 Command line options: map[iface:ethwe name:7a:67:a3:ad:5c:1e wait:20]
weave 2015/03/18 14:41:48.704654 Command line peers: [192.168.130.95]
weave 2015/03/18 14:41:49.705890 Communication between peers is unencrypted.
weave 2015/03/18 14:41:49.706632 Our name is 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:41:49.738252 Sniffing traffic on &{63 65535 ethwe d6:53:0f:08:71:f5 up|broadcast|multicast}
weave 2015/03/18 14:41:49.738280 Discovered our MAC d6:53:0f:08:71:f5
weave 2015/03/18 14:41:49.738620 ->[192.168.130.95:6783] attempting connection
weave 2015/03/18 14:41:49.741230 ->[192.168.130.95:6783] completed handshake with 7a:46:86:82:f5:92
weave 2015/03/18 14:41:49.741735 ->[7a:46:86:82:f5:92]: connection added
weave 2015/03/18 14:41:49.749514 ->[7a:46:86:82:f5:92]: connection fully established
weave 2015/03/18 14:41:49.749593 EMSGSIZE on send, expecting PMTU update (IP packet was 60064 bytes, payload was 60056 bytes)
weave 2015/03/18 14:41:49.749608 ->[7a:46:86:82:f5:92]: Effective PMTU set to 1438
weave 2015/03/18 14:41:49.751365 ->[7a:46:86:82:f5:92]: Effective PMTU verified at 1438
weave 2015/03/18 14:41:50.152645 Discovered local MAC 86:98:15:dd:e4:ef
weave 2015/03/18 14:41:50.404767 Discovered local MAC 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:41:53.299722 Discovered remote MAC 7a:46:86:82:f5:92 at 7a:46:86:82:f5:92
weave 2015/03/18 14:41:55.169164 Discovered remote MAC aa:df:0e:2b:63:f1 at 7a:46:86:82:f5:92
weave 2015/03/18 14:42:32.933803 EMSGSIZE on send, expecting PMTU update (IP packet was 927 bytes, payload was 919 bytes)
weave 2015/03/18 14:42:32.933829 ->[7a:46:86:82:f5:92]: Effective PMTU set to 490
weave 2015/03/18 14:42:32.935258 ->[7a:46:86:82:f5:92]: Effective PMTU verified at 490
weave 2015/03/18 14:42:33.135939 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:33.136136 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:33.340041 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:33.748170 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:34.564017 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:36.200074 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:39.476301 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:46.021177 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:55.819624 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:55.819747 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:56.020357 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:56.428777 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:57.244153 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:58.880001 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:59.108630 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:42:59.516569 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:00.332423 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:01.968884 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:02.148167 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:05.236450 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:08.692113 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:09.100339 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:09.916668 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:11.552377 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:11.780143 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:14.820745 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:21.363987 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:24.868180 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:34.468679 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:43:51.044114 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:44:00.645135 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:46:42.686522 Discovered remote MAC be:1b:9e:e8:24:8e at 7a:46:86:82:f5:92
weave 2015/03/18 14:50:55.416498 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:50:55.416623 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:50:55.621037 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:50:56.028239 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:50:56.845245 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:50:58.480026 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:51:01.748469 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:51:08.292302 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:51:21.380276 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:51:47.524948 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:51:49.740238 Expired MAC d6:53:0f:08:71:f5 at 7a:67:a3:ad:5c:1e
weave 2015/03/18 14:52:39.876569 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:52:49.740522 Expired MAC 7a:46:86:82:f5:92 at 7a:46:86:82:f5:92
weave 2015/03/18 14:54:24.580261 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:56:24.644420 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 14:56:49.741403 Expired MAC aa:df:0e:2b:63:f1 at 7a:46:86:82:f5:92
weave 2015/03/18 14:58:24.965048 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 15:00:25.283968 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 15:02:25.604498 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490
weave 2015/03/18 15:04:25.924619 Sending ICMP 3,4 (10.0.9.19 -> 10.0.9.102): PMTU= 490