VLAN - dedicated or shared NIC
Posted on 2011-09-20
The current esx hosts each have 6 physical NICs.
Each of these physical NICs serves a different VLAN. ie: vmnic0 = mgmt & vmotion, vmnic1 = iscsi, vmnic2 = dmz, vmnic3 = database, vmnic4 = internal1, vmnic5 = internal2
I am now building a new esx host that has 8 physical NICs but I want to know if I should separate each VLAN physically, or whether it would be better to share on physical NICs. ie: vmnic0 = mgmt & vmotion, vmnic1 = iscsi, vmnic2 = dmz/database/internal1/internal2
I believe it is best practice to keep mgmt & vmotion separate, and keeping iscsi is also best kept dedicated.
However I'm unsure about the implications of sharing the data vlans?
Should DMZ be kept separate to the others even though the traffic will traverse the firewall?
Ports are gigabit so bandwidth shouldn't be too much of a concern.
If I share the ports, it allows me to setup redundancy if needed.
I'd appreciate any feedback on the new design