next-hop (VXLAN Routing)
Syntax
Hierarchy Level
Release Information
Statement introduced in Junos OS Release 17.3R1 for QFX Series switches.
Description
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.
Options
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.
Default: 8000
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.