NexthopsΒΆ
Nexthops define intermediary points in routes in SD-WAN. Multiple nexthops can be assigned to a route, providing for custom failover scenarios and granular control over routing configurations.
Nexthops can be one of four types. This is explained in the following table:
Type |
Description |
|---|---|
Peer |
Specifies a peer (tunnel) as the intermediary for routing traffic. The most common nexthop type for SD-WAN configurations. When used in a route, traffic is forwarded through the peer to reach its destination. |
Gateway |
Routes traffic directly via a gateway device (router or L3 switch) on the local network. An optional interface can be specified to limit forwarding to a specific interface. |
Interface |
Directs traffic to hosts on a local Layer-2 network. The destination host Layer-2 address will be determined using ARP if IPv4 and NDP if IPv6. |
Blackhole |
Silently discards matching traffic. Common uses include blocking unwanted traffic (e.g., DDoS mitigation), preventing routing loops, or to avoid sending high-bandwidth traffic over metered or low-bandwidth links when a more appropriate connection is down. |
Nexthops work in tandem with routes and VRFs to create SD-WAN routing configurations. See the routes and VRF documentation for details.
Refer to the following links for more information on adding, editing, and deleting nexthops.