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

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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.

Table 1. Routing next-hops reserved on OS10 switchesRouting next-hops reserved on OS10 switches
OS10 Switch Overlay next-hop entries Underlay next-hop entries Overlay L3 RIF entries Underlay L3 RIF entries

S41xx-ON series:

default-overlay-routing

disable-overlay-routing

balanced-overlay-routing

scaled-overlay-routing

4096

0

16384

24576

28672

32768

16384

8192

2048

0

6144

10240

10240

12288

6144

2048

S4048T-ON and S6010-ON:

default-overlay-routing

disable-overlay-routing

balanced-overlay-routing

scaled-overlay-routing

8192

0

24576

40960

4096

49152

24576

8192

2048

49152

24576

8192

2048

0

6144

10240

S52xx-ON series:

default-overlay-routing

disable-overlay-routing

balanced-overlay-routing

scaled-overlay-routing

8192

0

32768

53248

57344

65536

32768

12288

2048

0

8192

12288

14336

16384

8192

4096

S4248-ON:

default-overlay-routing

20480

110592

4096

28672

NOTE: The S4248-ON switch supports only one default profile to reserve resources for overlay ARP entries.

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

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