Virtual Connect Flex-10 VLAN Configuration Question

[chuckk281]

Jack had a configuration question:

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Here is the configuration scenario:

1/ c7000 with 2 x Flex-10 modules working in Mapped mode, ESXi4.1 Update1 environment

2/ Defined 2 x SUS

                SUS_A

                                VLAN1_A

                                VLAN2_A

                                VLAN3_A

                SUS_B

                                VLAN1_B

                                VLAN2_B

                                VLAN3_B

3/ Creating an ESX server Profile

                Port1: Multiple Networks

                                VLAN1_A

                                VLAN2_A

                                VLAN3_A

                Port2: Multiple Networks

                                VLAN1_B

                                VLAN2_B

                                VLAN3_B

So far so good – everything works as expected

Now my question is whether I can configure Port3 like this

                Port3: Multiple Networks

                                VLAN1_A

                                VLAN4_A

                                VLAN5_A

When the customer does this the system does not post any error message however ESX will bring down both Port1 and Port3. As soon as VLAN1_A is removed from either Port1 or Port3 the operation of the ports is restored.

Is this an unsupported configuration or this particular configuration causes a network loop then the traffic from Port1 and Port3 is joined on the upstream switch?

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Ramu replied:

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Jack

Surely you would be associating a Vlan id for VLAN1_A. Two ports of a server can not be associated to same Vlan. That is the reason ESX brings down both the ports.

Why you want to configure two ports in same Vlan?. If you want more bandwidth please increase the bandwidth of the Port1.

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Vincent also joined in:

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VCM would give you an error if you try to assign a profile where 2 connections to the same VLAN would map to 2 FlexNICs of the same 10Gb port. Which blade model are you assigning this profile to ? Does it have mezz cards ?

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Comments? Other input for Jack?