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interface-num

Syntax

Hierarchy Level

Description

Configure the maximum number of physical interfaces reserved for use in an Ethernet VPN-Virtual Extensible LAN (EVPN-VXLAN) overlay network.

Juniper Networks switches support a maximum number of physical interfaces for use in either an underlay network or an EVPN-VXLAN overlay network. By default, a switch allocates 4096 physical interfaces for use in an EVPN-VXLAN network, which leaves the remaining physical interfaces for use in an underlay network. For example, a QFX5110 switch supports a maximum of 12288 physical interfaces. Subtracting the default value of 4096 interfaces from that maximum number leaves 8192 physical interfaces for use in an underlay network. The interface-num configuration statement enables you to re-allocate the maximum number of physical interfaces reserved for use in an EVPN-VXLAN network.

If you do not plan to use a switch in an EVPN-VXLAN network, you can set the interface-num configuration statement to 0, which allocates all physical interfaces for use in underlay networks.

Conversely, if you plan to use a switch in an EVPN-VXLAN network, you can re-allocate a greater number of the physical interfaces to the EVPN-VXLAN network.

Note:

Changing the default number of physical interfaces reserved for use in an EVPN-VXLAN network causes the Packet Forwarding Engine to restart. Restarting the Packet Forwarding Engine interrupts all forwarding operations. Therefore, we strongly recommend using this configuration statement before the EVPN-VXLAN network becomes operational.

Options

integer

Maximum number of physical interfaces reserved for use in an EVPN-VXLAN overlay network on a switch.

  • Range: QFX5110 switches: 0 through 12288. QFX5120 switches: 0 through 14336. The specified value must be a multiple of 2048—for example, 2048, 4096, 6144, and so on.

  • Default: 4096

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 17.3R1.