Product Documentation

Route Filtering

Aug 09, 2017

For  networks  with Route  Learning  enabled,  NetScaler SD-WAN  provides  more  control over  which  SD-WAN routes  are  advertised  to  routing  neighbors  rather  than  advertising  all  or  no  routes. Export  Filters  are  used  to  include  or  exclude  routes  for  advertisement  using  OSPF  and  BGP protocols  based  on  specific  match  criteria. Route filtering is implented on LAN routes in an SD-WAN network (Data Center/Branch) and are advertised to a Non SD-WAN network through eBGP.

How to Configure Route Import and Export Filters

  1.   In the Configuration Editor, navigate to Connections [Site Name] Route Learning
  2.  Expand Import Filters and Export Filters to view the existing route filters. Import Filters are separate and  distinct from Export Filters.  You can configure up to 32 Export Filters.    

Note

If there is only one Routing Domain configured, the Routing Domain column will not appear.  

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Use the following criteria to construct each Export Filter that you want to create.  

Field Criteria Description Value(s)

Order

The Order in which filters are prioritized. The first filter that a route matches to will be applied to that route.  

  • 100
  • 200
  • 300
  • 400
  • 500
  • 600

Routing Domain

To match routes from a specific routing domain, choose one of the configured Routing Domains from the drop-down menu.

  • <Any>
  • Def_RD - default

Network Address

Enter  the  IP  Address and  Netmask  or  configured  Network  Object  that  describes  the  route’s  network.    

  • IP address

Prefix

To match routes by prefix, choose a match predicate from the drop-down menu and enter a Route prefix in the adjacent field. 

  • eq: Equal to
  • lt: Less than
  • le: Less than or equal to
  • gt: Greater than
  • ge: Greater than or equal to

NetScaler SD-WAN Cost

The  method  (predicate)  and  the SD-WAN Route  Cost  that  are  used  to  narrow the  selection  of  routes  exported.    

  • Numeric value

Service Type

Select the Service types that will be assigned to matching routes from a list of the existing, supported NetScaler SD-WAN Services.

Service Types:

  • Any
  • Local
  • Virtual Path
  • Internet
  • Intranet
  • LAN GRE Tunnel
  • LAN IPsec Tunnel

Site/Service Name

For Intranet, LAN GRE Tunnel, and LAN IPsec Tunnel, specify the name of the configured Service Type to use. 

  • Text string

Gateway IP Address

If you choose LAN GRE Tunnel as the Service Type, enter the Gateway IP for the tunnel.  

  • IP address

Include

Click the checkbox to Include routes that match this filter. Otherwise matching routes are ignored.  

  • None

Enabled

Click the checkbox to Enable this filter. Otherwise the filter is ignored

  • None

Clone

Click the Clone icon to make copy of an existing Filter.

  • None