Recently we found from a customer where the ESXi connection to vcenter drops during backup or
during vmotion.
1. Vmware might not support more than 100 connections per vmk port.
2. It is good to seperate vmotion into a seperate vmk nic and vlan than being with management port.
3. Firewall in ESXi might not be able to handle the traffic
4. Check the ethtool for any network drops.
~ # esxcli network ip connection list | sort -k 4| awk '{print $4}'|cut -d ":" -f 1| uniq -c
~ # esxcli network ip connection list | sort -k 4
----- ------ ------ ------------------ ------------------ ----------- -------- --------------------
tcp 0 0 0.0.0.0:22 0.0.0.0:0 LISTEN 0
udp 0 0 0.0.0.0:427 0.0.0.0:0 0
tcp 0 0 0.0.0.0:443 0.0.0.0:0 LISTEN 4936 hostd-worker
tcp 0 0 0.0.0.0:5989 0.0.0.0:0 LISTEN 0
tcp 0 0 0.0.0.0:80 0.0.0.0:0 LISTEN 4936 hostd-worker
tcp 0 0 0.0.0.0:8000 0.0.0.0:0 LISTEN 4739
tcp 0 0 0.0.0.0:8100 0.0.0.0:0 LISTEN 4739
udp 0 0 0.0.0.0:8182 0.0.0.0:0 5972 fdm
tcp 0 0 0.0.0.0:8182 0.0.0.0:0 LISTEN 5963 fdm
udp 0 0 0.0.0.0:8200 0.0.0.0:0 4739
udp 0 0 0.0.0.0:8301 0.0.0.0:0 4739
udp 0 0 0.0.0.0:8302 0.0.0.0:0 4739
tcp 0 0 0.0.0.0:902 0.0.0.0:0 LISTEN 0
udp 0 0 10.202.1.154:427 0.0.0.0:0 0
tcp 0 0 10.202.1.154:427 0.0.0.0:0 LISTEN 0
tcp 0 0 10.202.1.154:443 10.202.1.101:57247 ESTABLISHED 5225 hostd-worker
tcp 0 0 10.202.1.154:443 10.202.1.101:60137 ESTABLISHED 6356 hostd-worker
tcp 0 0 10.202.1.154:443 10.202.1.101:60142 ESTABLISHED 8571 hostd-worker
tcp 0 0 10.202.1.154:443 10.202.1.101:62014 ESTABLISHED 6351 hostd-worker
tcp 0 0 10.202.1.154:51421 10.202.1.170:443 ESTABLISHED 5589 vShield-Endpoint-Mux
tcp 0 0 10.202.1.154:56833 10.202.1.170:443 ESTABLISHED 5589 vShield-Endpoint-Mux
tcp 0 0 10.202.1.154:5989 10.202.1.101:58067 FIN_WAIT_2 0
tcp 0 0 10.202.1.154:60608 10.202.1.153:8182 ESTABLISHED 5977 fdm
tcp 0 0 10.202.1.154:897 10.202.1.250:2049 ESTABLISHED 4811 nfsLockFileUpdate
tcp 0 0 127.0.0.1:12000 0.0.0.0:0 LISTEN 225516 vpxa-worker
tcp 0 0 127.0.0.1:12001 0.0.0.0:0 LISTEN 4936 hostd-worker
tcp 0 0 127.0.0.1:427 0.0.0.0:0 LISTEN 0
tcp 0 0 127.0.0.1:443 127.0.0.1:50393 ESTABLISHED 6352 hostd-worker
tcp 0 0 127.0.0.1:49422 127.0.0.1:8307 ESTABLISHED 225530 vpxa-worker
tcp 0 0 127.0.0.1:49572 127.0.0.1:5988 CLOSE_WAIT 6355 hostd-worker
tcp 0 0 127.0.0.1:50058 127.0.0.1:80 ESTABLISHED 5873 sfcb-vmware_bas
tcp 0 0 127.0.0.1:50163 127.0.0.1:8307 ESTABLISHED 263472 vpxa-worker
tcp 0 0 127.0.0.1:50393 127.0.0.1:443 ESTABLISHED 984559 python
tcp 0 0 127.0.0.1:51125 127.0.0.1:8307 TIME_WAIT 0
tcp 0 0 127.0.0.1:52165 127.0.0.1:8089 ESTABLISHED 25860 hostd-worker
tcp 0 0 127.0.0.1:52240 127.0.0.1:8307 TIME_WAIT 0
tcp 0 0 127.0.0.1:52398 127.0.0.1:8307 ESTABLISHED 225532 vpxa-worker
tcp 0 0 127.0.0.1:53593 127.0.0.1:8307 ESTABLISHED 6352 hostd-worker
tcp 0 0 127.0.0.1:53696 127.0.0.1:8307 TIME_WAIT 0
tcp 0 0 127.0.0.1:54018 127.0.0.1:8307 FIN_WAIT_2 4936 hostd-worker
tcp 0 0 127.0.0.1:54093 127.0.0.1:80 CLOSE_WAIT 5867 sfcb-vmware_bas
tcp 0 0 127.0.0.1:54103 127.0.0.1:8307 ESTABLISHED 5975 fdm
tcp 0 0 127.0.0.1:54545 127.0.0.1:8089 ESTABLISHED 225466 hostd-worker
tcp 0 0 127.0.0.1:56006 127.0.0.1:8307 TIME_WAIT 0
tcp 0 0 127.0.0.1:56719 127.0.0.1:8307 ESTABLISHED 225533 vpxa-worker
tcp 0 0 127.0.0.1:57105 127.0.0.1:443 TIME_WAIT 0
tcp 0 0 127.0.0.1:57181 127.0.0.1:8089 ESTABLISHED 6352 hostd-worker
tcp 0 0 127.0.0.1:57196 127.0.0.1:8089 ESTABLISHED 225479 hostd-worker
tcp 0 0 127.0.0.1:57311 127.0.0.1:8089 TIME_WAIT 0
tcp 0 0 127.0.0.1:57541 127.0.0.1:8089 TIME_WAIT 0
tcp 0 0 127.0.0.1:57720 127.0.0.1:443 TIME_WAIT 0
tcp 0 0 127.0.0.1:57807 127.0.0.1:8307 ESTABLISHED 5977 fdm
tcp 0 0 127.0.0.1:57981 127.0.0.1:8307 ESTABLISHED 225529 vpxa-worker
tcp 0 0 127.0.0.1:59574 127.0.0.1:8307 ESTABLISHED 225528 vpxa-worker
tcp 0 0 127.0.0.1:5988 0.0.0.0:0 LISTEN 0
tcp 0 0 127.0.0.1:5988 127.0.0.1:49572 FIN_WAIT_2 0
tcp 0 0 127.0.0.1:5988 127.0.0.1:56961 TIME_WAIT 0
tcp 0 0 127.0.0.1:60625 127.0.0.1:8307 ESTABLISHED 263472 vpxa-worker
tcp 0 0 127.0.0.1:61171 127.0.0.1:8307 ESTABLISHED 5963 fdm
tcp 0 0 127.0.0.1:62139 127.0.0.1:8307 ESTABLISHED 225479 hostd-worker
tcp 0 0 127.0.0.1:80 127.0.0.1:50058 ESTABLISHED 6588 hostd-worker
tcp 0 0 127.0.0.1:80 127.0.0.1:54093 FIN_WAIT_2 4936 hostd-worker
tcp 0 0 127.0.0.1:8089 0.0.0.0:0 LISTEN 225516 vpxa-worker
tcp 0 0 127.0.0.1:8089 127.0.0.1:52165 ESTABLISHED 225532 vpxa-worker
tcp 0 0 127.0.0.1:8089 127.0.0.1:54545 ESTABLISHED 225525 vpxa-worker
tcp 0 0 127.0.0.1:8089 127.0.0.1:57181 ESTABLISHED 263531 vpxa-worker
tcp 0 0 127.0.0.1:8089 127.0.0.1:57196 ESTABLISHED 225522 vpxa-worker
tcp 0 0 127.0.0.1:8307 0.0.0.0:0 LISTEN 4936 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:49422 ESTABLISHED 225477 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:50163 ESTABLISHED 6355 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:52398 ESTABLISHED 225466 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:53593 ESTABLISHED 5225 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:54018 CLOSE_WAIT 4965 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:54103 ESTABLISHED 4966 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:56719 ESTABLISHED 22169 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:57807 ESTABLISHED 225482 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:57981 ESTABLISHED 4936 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:59574 ESTABLISHED 4962 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:60625 ESTABLISHED 6557 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:61171 ESTABLISHED 225480 hostd-worker
tcp 0 0 127.0.0.1:8307 127.0.0.1:62139 ESTABLISHED 6553 hostd-worker
tcp 0 0 127.0.0.1:8309 0.0.0.0:0 LISTEN 4936 hostd-worker
tcp 0 0 127.0.0.1:8889 0.0.0.0:0 LISTEN 5387 openwsmand
tcp 0 0 127.0.0.1:9089 0.0.0.0:0 LISTEN 5963 fdm
tcp 0 0 127.0.0.1:9090 0.0.0.0:0 LISTEN 5963 fdm
tcp 0 0 169.254.1.1:2222 0.0.0.0:0 LISTEN 4739
udp 0 0 169.254.1.1:427 0.0.0.0:0 0
tcp 0 0 169.254.1.1:427 0.0.0.0:0 LISTEN 0
tcp 0 0 192.168.5.1:22 192.168.5.2:49718 ESTABLISHED 0
udp 0 0 192.168.5.1:427 0.0.0.0:0 0
tcp 0 0 192.168.5.1:427 0.0.0.0:0 LISTEN 0
tcp 0 0 192.168.5.1:825 192.168.5.2:2049 ESTABLISHED 4811 nfsLockFileUpdate
tcp 0 0 192.168.5.1:826 192.168.5.2:2049 ESTABLISHED 6496 vmm0:D39
tcp 0 0 192.168.5.1:828 192.168.5.2:2049 ESTABLISHED 0
Proto Recv Q Send Q Local Address Foreign Address State World ID World Name
2. Seperate the vmotion and management vmknic/vlan
3. Firewall settings:
4. "ethtool -S vmnic0 |grep error| grep -v :\ 0"
5. Finally review vpxa.log and hostd.log on ESXi as well as vpxd.log in vcenter.
6. Fix when it is hung is to restart services ( services.sh restart)