VMware vCenter Server 8.x
VMware vSphere ESXi 8.x
VMware vCenter Server 7.x
VMware vSphere ESXi 7.x
The vmkping command sources a ping from the local VMkernel port.
Instructions to test vmkernel ping connectivity with vmkping:
Verification of your MTU size can be obtained from a SSH session by running this command:
esxcfg-nics -l
Output should be similar to:
esxcfg-nics -l
Name PCI Driver Link Speed Duplex MAC Address MTU Description
vmnic0 0000:02:00.00 e1000 Up 1000Mbps Full ##:##:##:##:##:## 9000 Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
vmnic1 0000:02:01.00 e1000 Up 1000Mbps Full ##:##:##:##:##:## 9000 Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
esxcfg-vmknic -l
Output should be similar to:
esxcfg-vmknic -l
Interface Port Group/DVPort IP Family IP Address Netmask Broadcast MAC Address MTU TSO MSS Enabled Type
vmk1 iSCSI IPv4 10.10.10.10 255.255.255.0 10.10.10.255 ##:##:##:##:##:## 9000 65535 true STATIC
A successful ping response is similar to:
vmkping -I vmk0 10.0.0.1
PING server(10.0.0.1): 56 data bytes
64 bytes from 10.0.0.1: icmp_seq=0 ttl=64 time=10.245 ms
64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.935 ms
64 bytes from 10.0.0.1: icmp_seq=2 ttl=64 time=0.926 ms
--- server ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.926/4.035/10.245 ms
An unsuccessful ping response is similar to:
vmkping 10.0.0.2
PING server (10.0.0.2) 56(84) bytes of data.
--- server ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 3017ms
Note: The commands shown above are the same for ipv6. Just need to add the -6 option in the command, for example:
vmkping -6 and replace #.#.#.# by an ipv6 address ##:##:##:##:##:##:##:##
vmkping [args] [host]
arg | use |
---|---|
-4 | use IPv4 (default) |
-6 | use IPv6 |
-c <count> | set packet count |
-d | set DF bit (do not fragment) in IPv4 or Disable Fragmentation (IPv6) |
-D | vmkernel TCP stack debug mode |
-i <interval> | set interval (secs) |
-I <interface> | set outgoing interface, such as "-I vmk1" |
-N <next_hop> | set IP*_NEXTHOP- bypasses routing lookup for IPv4, -I is required to use -N |
-s <size> | set the number of ICMP data bytes to be sent The default is 56, which translates to a 64 byte ICMP frame when adding the 8 byte ICMP header (these sizes do not include the header) |
-t <ttl> | set IPv4 Time To Live or IPv6 Hop Limit |
-v | verbose |
-W <time> | set timeout to wait if no responses are received (secs) |
-X | XML output format for esxcli framework |
-S | sets the network stack instance name. If unspecified, the default stack is used. Note: only works for IPv4, not IPv6) |
Notes: