vNIC works do not on the blades of the B series

FI: 6248

Chassis: 5108

Blades: B200 M2 x 2

Uplink: 5548UP

I'll put up a pretty standard UCS deployment and I the uplinks VPC of the 6248 fab 'normal' on the link 5548 s. Uplinks seem to work properly as I can manage UCS without any problem and can KVM to each blade. I set up the pool mgmt ext and each blade receives an address correctly.

Initially, I set up a Xenserver blade and was able to connect on a virtual local network server that I created. However, since then I have rebooted the server and may not have to work again little matter what I try. I also tried to load a Windows 2008 x 64 server and while I am able to load the operating system and configure the network adapters in Windows (after installing the drivers B200), there is no network connectivity... It's as if the VLAN tagged traffic is not sent upstream.

I checked that all our VLAN are passed on to the uplink between FIs them and the 5548 s nexus and I know that it worked at some point, so it intrigued me.

I must have been misconfigured something but I can't for the life of understand me what it was. I've recreated the VLAN, Services, models of Service profiles, etc. Whenever I reload a blade, whether with Xenserver or windows standard, I am able to see and configure network adapters, but I can't get any traffic. I can't do a ping from within the 6248 s since this cmd is not support, nor I see any troubleshooting traffic being passed.

Can someone please pass along some troubleshooting tips and/or the places that I can look for problems where the traffic is dying? I'm pulling my hair out!

TIA!

Just to clarify,

Native of VLANS and VLAN by default are two different things.  Native simply refers to the VLAN on a 802. 1 q trunked link which will not be added a tag VLAN.  By default VLAN is the VLAN 'automatically assigned' to all interfaces vNIC.  By default, the "vlan by default ' is vlan 1, but this can be changed.

When you create a profile Service (or a model by the way), you can use the Simple, or Assistant Expert.  The Simple Wizard assumes that each vNIC will work as an "access port" by being assigned to only one vlan.  In expert mode, you can select either the port to operate as a Port of access (VLAN unique) or trunk (multiple VLANs).  It is only with the vNIC trunk configuration where you can select the option button VLAN "native".

So let's say you have a Windows host to be assigned to VLAN 10.

You could create a simple vNIC than acccess VLAN 10 only, or you can create a trunk Interface, but set as the native VLAN 10.  Each method returns the same result.

To as ESX & Hyper-V operating systems you can indeed Trunking and therefore allowing several VLANS.

On top of that, although we present what seems to be 'Access' and 'Trunk' ports, now there actually no access port.  That means UCS, when you select a vNIC to be an access port is just make a trunk with the only interface VLAN as the native.

You can see this NXOS if you look at 'int trunk.

Kind regards

Robert

Tags: Cisco DataCenter

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