Q: Is it possible to configure multiple Open Shortest Path First (OSPF) on a NetScaler appliance?
A: No. The NetScaler appliance supports type 1, type 2, and type 3 Link State Advertisement (LSA). Starting NetScaler software release, type 7 LSA for Not-So-Stubby-Areas (NSSAs) is also supported. However, the NetScaler appliance does not support the inter area and external link advertisements, which as type 4 and type 5 LSAs, respectively. As a result, you can configure the appliance only for a single area.
You can configure OSPF on the NetScaler appliance by using the vtysh shell. However, starting NetScaler software release 9.0, you can run the OSPF commands directly from the command line interface of the appliance. When you configure OSPF from the vtysh shell, the configuration is not available in the running configuration of the appliance. However, if configured appropriately, then the routes are available in the routing table of the appliance.
The following is a sample of configuring OSPF on a NetScaler appliance from the vtysh shell:> vtysh