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Routing
Note
From SD-WAN 11.5 release onwards, all the routing configurations are supported only through Citrix SD-WAN Orchestrator service. For information regarding Citrix SD-WAN Orchestrator service routing configurations, see Routing.
Dynamic Routing
Citrix SD-WAN introduces support for well known Routing protocols under the Dynamic Routing feature. This feature facilitates the discovery of LAN subnets, advertise virtual path routes to work more seamlessly within networks using the BGP and OSPF protocols, allowing SD-WAN to be seamlessly deployed in an existing environment without the need for static route configurations and graceful router failover.
Route Filtering
For networks with Route Learning enabled, Citrix SD-WAN provides more control over which SD-WAN routes are advertised to routing neighbors rather and which routes are received from routing neighbors, rather than advertising and accepting all or no routes.
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Export Filters are used to include or exclude routes for advertisement using OSPF and BGP protocols based on specific match criteria.
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Import Filters are used to accept or not accept routes which are received using OSPF and BGP neighbors based on specific match criteria.
Route filtering is implemented on LAN routes and Virtual Path routes in an SD-WAN network (Data Center/Branch) and is advertised to a non-SD-WAN network through using BGP and OSPF.
Route Summarization
Route summarization reduces the number of routes that a router must maintain. A summary route is a single route that is used to represent multiple routes. It saves bandwidth by sending a single route advertisement, reducing the number of links between routers. It saves memory because only one route address is maintained. The CPU resources are used more efficiently by avoiding recursive lookups.
VRRP
Virtual Router Redundancy Protocol (VRRP) is a widely used protocol that provides device redundancy to eliminate the single point of failure inherent in the static default-routed environment. VRRP allows you to configure two or more routers to form a group. This group appears as a single default gateway with one virtual IP address and one virtual MAC address.
Citrix SD-WAN (release version 10.0 and later) supports VRRP version 2 and version 3 to inter-operate with any third party routers. The SD-WAN appliance acts as a master router and direct the traffic to use the Virtual Path Service between sites. You can configure the SD-WAN appliance as the VRRP master by configuring the Virtual Interface IP as the VRRP IP and by manually setting the priority to a higher value than the peer routers. You can configure the advertisement interval and the preempt option.
Using CLI to Access Routing Functionality
You can view additional information related to dynamic routing and the protocol status. Type the following command and syntax to access the routing daemon and view the list of commands.
` dynamic_routing? `
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