VXLAN and BGP EVPN Configuration Guide for Dell EMC SmartFabric OS10 Release 10.5.2

L3 VXLAN route scaling

The S4100-ON series, S5200-ON series, S4048T-ON, S4248-ON series, and S6010-ON switches support native VxLAN routing — routing in and out of tunnels (RIOT). RIOT requires dedicated hardware resources reserved for overlay routing. You cannot use these dedicated resources for underlay routing.

Each overlay ARP entry requires a routing next-hop in the hardware to bind a destination tenant VM IP address to the corresponding tenant VM MAC address and VNI. Each virtual-network interface assigned to an IP subnet requires a routing interface in the hardware.

OS10 supports preset profiles to re-allocate the number of resources reserved for overlay ARP entries. The number of entries reserved for each preset mode differs according to OS10 switch.

To activate the profile after you configure an overlay routing profile, save the configuration and reload the switch.

Configure an overlay routing profile

• Enable an overlay routing profile in Configuration mode or disable the configured profile and return to the default.

  OS10(config)# hardware overlay-routing-profile {disable-overlay-routing | balanced-overlay-routing | 
  scaled-overlay-routing}

Display overlay routing profiles

• View the hardware resources available for overlay routing in different profiles; for example, in the S5200-ON series:

  OS10# show hardware overlay-routing-profile mode all 
  Mode                     Overlay Next-hop  Underlay Next-hop  Overlay L3 RIF  Underlay L3 RIF
                            Entries          Entries            Entries         Entries
  default-overlay-routing   8192             57344              2048            14336          
  disable-overlay-routing   0                65536              0               16384          
  balanced-overlay-routing  32768            32768              8192            8192           
  scaled-overlay-routing    53248            12288              12288           4096

• View the currently configured overlay routing profile; for example, in the S5200-ON series:

  show hardware overlay-routing-profile mode 
                                     Overlay    Underlay   Overlay   Underlay 
  Setting     Mode                   Next-hop   Next-hop   L3 RIF    L3 RIF
                                     Entries    Entries    Entries   Entries
  Current    default-overlay-routing   8192     57344      2048      14336          
  Next-boot  default-overlay-routing   8192     57344      2048      14336