Okay.
steps and results:
situation:
nic2 belongs to switch0 with ip 192.168.11.98 (management)
nic3 belongs to switch2 eith ip 192.168.11.110 (vMotion)
pings are okay.
then I shutdown port on dell switch which is uplink for nic2.
No pings management interface (nic2/vSw0/192.168.11.98)
nic3 still pings well.
any another ideas?