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natewilson
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Cisco Nexus 1000V VSM port group settings?

I have been unable to find the port group settings when running the VSM within a VM addressed in the Cisco docs.. they just say "create 3 port goups". But, the VLAN configuration for those PGs are not clear to me.

Within the VSM configuration, you defined the VLAN that each network (Mgmnt, Control, Packet) are on. This implies that the VSM VM will be generating tagged packets, so the port groups should be set as trunk / virtual guest tag.

But, if that's the case, why do they recommend 3 port groups? You should be able to use one trunk port group and let the physical switch handle the VLANs. So, are they instead expecting that the VLAN assignment will be done on the Port Groups?

The Cisco config docs give lots of info on the Cisco command-line config.. Can some give, or point to, the settings on the VMware port groups when using the VSM from within a VM?

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vctravis
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Hello

The VSM vm doesn't generate tagged packets but relies on the configuration of the Vswitch port-group VLAN ID to tag them. This is done as they egress the host machine on the vmnic associated with the Vswitch.

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vctravis
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Hello

The VSM vm doesn't generate tagged packets but relies on the configuration of the Vswitch port-group VLAN ID to tag them. This is done as they egress the host machine on the vmnic associated with the Vswitch.

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udaysrinivasan
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Yes that’s right..

The N1K VSM does not do tagging when it sends traffic out 3 ethernet ports (control/packet/management). All three ports are access ports and hence should not be configured in trunk/virtual guest tag.

Set up the virtual switch to which N1K VSM is connected as you would for any other VM. So you would connect the 3 VSM ports to port groups configured with corresponding vlans.

The configuration of the contro/packet vlans in the VSM is for internal use only and does not setup the virtual switch or any other uplink switch connected between the VSM and VEM.

natewilson
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Thanks for the responses. The VLAN config within the VSM VM threw me off. In standard VMs, the VM itself is unaware of any VLAN settings when the VLAN configured in the port group.

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