Catch 22 - Port Trunk Configurations: how to combine identifiers VLAN native with DHCP (but allows traffic of VM)

Catch 22 - Port Network Configurations: how to combine identifiers VLAN native with DHCP (but allow the virtual computer)

I came across a Catch 22.  Maybe someone can restore the directly here.  I found a "witch hunt" for sure.

It comes with the Ports of junction on the side of the switch of the ESX host network.

Context:

Ok. The Setup is a HP Blade C7000 enclosure.  I try to configure ports for switching to the blades.  ESX 3.5 U4 will be installed the BL460cs.  Installation is preferred method: revive unattended.  No problem with the syntax of Kick-Start,

I am here, it's the side network.

The problem:

I find a major complication in that the switch ports must be configured for both traffic Service Console and VMkernel, more Virtual Machine since only two NICs by blade. Not best practices, but we have only two switches Cisco 3020 inside.  The two uplink physical NIC is paired in the same vSwitch.  (No iSCSI does fortunately).

So the Catch 22 question is as follows:

If the id VLAN native set up on the switch port, DHCP works of course and the VMware boot loader is able to grasp a binary / packets on the network (FTP Site) and install OK.  But after no installation, no communication with SC unless I set the VLAN id of the SC to '0 '.  The value "4" 0 does not communication, but "40" is the VLAN native.

If id configuring VLAN native retired from the Switch port, DHCP will not work and host does not have IP address during the VMware boot process.  This is as expected as traffic without label is not assigned an eligible

VLAN, so no comms.

The Port of the Switch configuration:

interface GigabitEthernet0/16

SERVERNAME description

switchport trunk encapsulation dot1q

switchport trunk vlan native 40

switchport trunk allowed vlan 40-254

switchport mode trunk

switchport nonegotiate

Speed 1000

No cdp enable

spanning tree portfast trunk

end

Summary

OK, let's summarize where things are and if possible please attach responses to their digital identity.

(1) is there a way to delete the VLAN tagging altogether side ESX host? Not only the id '0 '. The problem is with clearly with the VLAN native defined as "40".  If "40" IDs specified on the Group of ports for the Service Console, no joy, no comms. If the id of '0' value, capable of ping gateway and communicate on the network.

(2) what is the problem with the definition of VLAN native as "40" when the config for the switch port is set as VLAN native "40"?  Or if it was a problem?  Both parameters clearly do not work together.

(3) a switch receiving a unmarked frame it will assign to the VLAN Trunk native. Ok. Trunking bases and why I need a VLAN specified on the port for DHCP native work.  But it seems that since the id VLAN is set manually even as VLAN native, closed communications and no traffic as possible.

(4) executives made tag 802. 1 q VLAN native?  I think that it is not and this could well be the problem. Since the id VLAN "40" is not labeled, but try to score the side host vSwitch port group.

Please let me know your thoughts, community and how in general, we are approaching 2 NIC ESX configurations.

When trunking multiple VLANs, you either have a default VLAN is nothing is tagged, or you don't.  That's what the vlan native to you, it defines which VLAN would be used if no tag is visible on the packets traversing the network.  For servers, if you are marking, then everything has to tag, if you're not marking at the server level, then the port must be either an access port or a VLAN native or default must be set.  I also don't keep your service console the same network as your vm.  Keep this isolated for the security of the network.  If you isolate this VLAN, you can separate and use a single IP address for installation and one for post construction.

Or, you can provide an IP address during the build.

-KjB

VMware vExpert

Tags: VMware

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