Host spanning problems

[AlexVeber]

Hi,

I have 2 ESXi servers in the cluster dedicated for vCD, i have created a vcloud isolated network and routed it to the external network.

my problem is that only a VM that runs on the same Host as the vShield EDGE appliance get network connectivity, if the vShield EDGE is on Host1 and the VM is on Host2 i can't even ping the default gateway (which is the vShield EDGE).

Please note that my vShield Manager is in a diffrent cluster connected to adiffrent dvswitch, is that a problem? I couldn't find anywhere in the documantation that thats a problem, I only found in the vSheild install docs that the manager and the EDGE muste belong to the same vcenter, which they are.

Please help me resolve this issue.

Thanks.

[AlexVeber]

Ok I found the problem.

When I created the Network Pool I didn't provide a VLAN ID, and because we are using 2 nics with trunk the Host Spanning couldn't communicate between the hosts.

[depping]

Please note that there is a slight overhead in vCNI. In order to avoid fragmentation it is recommended to increase the MTU size to at least 1524 on the dvSwitch you are using for vCNI. Just a tip,

Duncan

VMware Communities User Moderator | VCDX

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[admin]

hi there

if no VLAN ID is used in the VCN-I network pool it wil use the Native VLAN - if you physical switches are configured to drop packets if they get tagged with the native VLAN you will get this happening.