Regional Routing (RR)

🚀

Best Practice: ON (default)

Considerations:

• Environment size and organizational requirements

• 9.3.x.x and older

  30,000 route table limit

  9.4.x.x newer

  60,000 route table limit

🚧

RR affect routing advertisements from hub devices.

RR - OFF

• Hub does not send other Spoke routes to spokes via SDWAN
• Without a default route from the Hub, spokes cannot Hairpin through the HUB, need a route to attract the traffic to the hub, the hub routing table routes to the spoke.
  • Default route can be learned VIA BGP/OSFP or advertise only route.
    • RFC-1918 is also an option if default route is not an option
    • supnets/subnets of branches
    • Routes learned belong to the Zone they are learned in. More information in (Future link)
• Example: RR off Spoke only see HUB routes

RR- ON

• Hub sends all learned Spoke routes to all Spokes

• 🔎

  Metric of 50 added per hop, Maximum 2 hops

📘

Regional Routing (RR) affects the way routes are advertised in hub-and-spoke setups. In a mesh network, each appliance has routes to the appliances to which it has tunnels.