Hi,
If the other vswitches seem ok first thing i'd check is on the host itself can you ping any other ip addresses on the same subnet, if you can check your default gateway settings.
is your management network running a NIC team? what version of ESX you running?
If you are running a team for your management network could try removing/adding a nic at a time. We had
a few management networks go AWOL when the teaming on the physical switch was changed to LACP without changing
the config on the vswitches.
esx 4.x
esxcfg-vswitch -l
(will list your vswitches
esxcfg-vswitch -U vmnic# <mgmt network vswitch> - to unlink a nic from a team -L to add a again
esx 5.x
check
Many tx
