next-hop (VXLAN Routing)
Statement introduced in Junos OS Release 17.3R1 for QFX Series switches.
Configure the maximum number of next hops reserved for use in an Ethernet VPN-Virtual Extensible LAN (EVPN-VXLAN) overlay network.
Juniper Networks switches can store a maximum number of next hops for use in either an underlay network or an EVPN-VXLAN overlay network. By default, a switch allocates 8,000 next hops for use in an EVPN-VXLAN network, which leaves the remaining next hops for use in an underlay network. For example, the default setting of 8,000 next hops for a QFX5110 switch, which can store a maximum of 45,056 next hops, leaves 37,056 next hops for use in an underlay network. The next-hop configuration statement enables you to re-allocate the maximum number of next hops 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 next-hop configuration statement to 0, which allocates all next hops for use in an underlay network.
Conversely, if you plan to use a switch in an EVPN-VXLAN network, you can re-allocate a greater number of the next hops to the EVPN-VXLAN network.
Changing the default number of next hops 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.
Range: QFX5110 switches: 0 through 45056. QFX5120 switches: 0 through 61440. The specified value must be a multiple of 4096—for example, 4096, 8192, 12.288, and so on.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.