Users Guide

● Multirack Layer 3 VLAN networks
General purpose networks
General purpose networks are L2 VLAN networks in VxRail and L2 VXLAN networks in L3 fabric.
For L3 fabric, SmartFabric services automatically creates a virtual network corresponding to a network. This virtual network has
one-to-one mapping with the network, which means for each VLAN, there exists a virtual network with VNI same as the VLAN
ID.
VXLAN networks
VXLAN network extends L2 connectivity over an underlay L3 connected network.
Association of VXLAN network to interface creates a binding and associates this interface to VXLAN bridge.
You need to create a virtual network template and a network template, and associate the virtual network template to network
template.
● The virtual network template defines the VNET-id.
● Network template defines the VLAN ID.
In addition to whatever is specified in the L2 VXLAN network, for L3 VXLAN, specify:
● List of IP addresses. One IP address for each leaf.
● ANY-CAST IP address
L3 VXLAN network supports asymmetric-IRB.
L3 VLAN network
L3 VLAN network is used for L3 VLAN underlay.
Specify:
● VLAN ID
● Pair of IP addresses to be assigned to the VLT pair.
● VRRP gateway IP address for VIP
L3 Routed network
L3 Routed network is used to assign IP address on a single interface. Specify the IP address.
Attach this network to any uplink that has a single interface. This network can only be attached to a single entity.
Multirack Layer 3 VLAN network
Multirack Layer 3 VLAN network is an SFS template that contains rack-specific IP configurations for a L3 VLAN. It is used to
configure IPv4 attributes for each rack in an NXS-T deployment consisting of multirack leaf spine topology.
A rack holds a pair of switches that are configured with VLT. The rack identifier is the same as the fabric ID. A rack containing a
single switch without VLT does not support multirack L3 VLAN network.
In an NSX-T topology that is connected to an SFS cluster, you can create a multirack L3 VLAN network by specifying the
network identifier, L3 VLAN ID, and list of rack-specific IPv4 configurations. Attach the created network as untagged or tagged
on any uplink or server interface of the rack. After you attach the network, SFS automatically creates a Layer 3 VLAN and
applies the rack-specific IP configurations to the respective rack within the topology. You can modify the IPv4 configuration for
a specific rack in the multirack L3 VLAN network.
NOTE:
For faster traffic convergence, Dell Technologies recommends setting the BGP keepalive timer to 1 second and
hold-time to 3 seconds on the NSX-T tier-0 node.
Uplinks
An uplink is a set of ports that are connected to the customer network.
This uplink entity contains a rigid set of network characteristics.
Layer 2 Uplinks from leaf nodes
Layer 2 uplinks are a set of user-selected ports that belong to same VLT peer nodes on which the Layer 2 network is applied.
SFS creates a VLT LAG for these connected ports. If the ports are from a single device, then the VLT LAG is a single armed VLT
LAG. In case these ports exist on multiple nodes, a VLT or multi-chassis LAG is formed across these ports. This LAG can be
made as an access point for a VXLAN layer 2 network.
Layer 3 uplinks
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SmartFabric Services