Inter Traffic Domain Entity Bindings
You can bind services in one traffic domain to a virtual server in another traffic domain. All the services to be bound to a virtual server in a different traffic domain must reside in the same traffic domain.
You configure this support by using the existing bind lb vserver command or the related NetScaler GUI procedure.
This capability can facilitate interaction between different traffic domains. In an enterprise, servers can be grouped in different traffic domains. Virtual servers are created in a traffic domain that faces the internet. A virtual server from this traffic domain can be configured to load balance servers in another traffic domain. This virtual server receives connection requests from the Internet to be forwarded to the bound servers.
When a NetScaler appliance is used in a cloud infrastructure, each tenant can be assigned a separate traffic domain, and all the resources (including servers) for a tenant can be grouped together in the tenant’s traffic domain. For each tenant, a virtual server is created for load balancing servers in its traffic domain. All of these virtual servers are grouped together in a single traffic domain that faces the Internet.
Consider an example of in which cloud service provider Example-Cloud-A has three traffic domains, with IDs 10, 20, and 30, configured on NetScaler appliance NS1.
Example-Org-A and Example-Org-B are tenants of Example-Cloud-A. Tenant A is assigned traffic domain 20, and tenant B is assigned domain 30. Servers S1 and S2 reside in traffic domain 20 and servers S3 and S4 reside in traffic domain 30.
Traffic domain 10 faces the internet. Virtual servers LBVS-1 and LBVS-2 are created in traffic domain 10. LBVS-1, in traffic domain 10, is configured to load balance servers S1 and S2, which are in traffic domain 20. LBVS-2, in traffic domain 10, is configured to load balance servers S3 and S4, which are in traffic domain 30.
Therefore, these virtual servers accept Internet connection requests for servers that are in a different traffic domain than that of the virtual servers.